The document discusses hydraulic pumps and provides details on positive displacement pumps. It describes different types of positive displacement pumps including reciprocating pumps like piston pumps, plunger pumps, and diaphragm pumps. It also discusses rotary positive displacement pumps such as gear pumps, lobe pumps, screw pumps, and vane pumps. For each type of pump, it provides information on working principles, advantages, disadvantages, applications and compatibility with different fluids.
Pumps are used to deliver hydraulic fluid throughout a hydraulic circuit. There are two main types of pumps - positive displacement pumps and non-positive displacement pumps. Positive displacement pumps precisely regulate fluid output with each cycle, while non-positive displacement pumps like centrifugal pumps rely on fluid velocity to move fluid and output varies with pressure. Common positive displacement pump designs include gear pumps, vane pumps, and piston pumps which use rotating gears, vanes, or pistons to draw fluid in and push it out in fixed volumes. Selection of the appropriate pump type depends on factors like operating pressure, flow requirements, drive type, and tolerance to contamination.
Pumps move fluid from one place to another by converting energy into hydraulic energy and pressure. There are several types of pumps including positive displacement pumps which apply direct pressure on the fluid. Reciprocating positive displacement pumps use pistons, plungers or diaphragms and valves to move fluid in an oscillating motion. Specific examples described include piston pumps such as lift pumps and force pumps, axial piston pumps which have pistons arranged circularly in a housing, and diaphragm pumps which use a reciprocating diaphragm and valves to pump fluid.
A pump is a mechanical device that uses mechanical action to move fluids from one place to another. There are two main types of pumps: positive displacement pumps and hydrodynamic pumps. Positive displacement pumps work by trapping a fixed amount of fluid and forcing it to the discharge side, including types like reciprocating pumps (piston pumps, plunger pumps, diaphragm pumps), rotary pumps (gear pumps, screw pumps, lobe pumps, vane pumps). Reciprocating positive displacement pumps include piston pumps, diaphragm pumps, and plunger pumps. Piston pumps can be further divided into types like axial piston pumps and radial piston pumps.
This document provides information on various types of pumps used in hydraulic systems. It discusses the basic classifications of pumps as either positive displacement pumps or non-positive displacement pumps. Positive displacement pumps deliver a fixed volume of fluid per cycle, while non-positive displacement pumps output depends on resistance. Common positive displacement pump types described include gear pumps, vane pumps, piston pumps, and lobe pumps. Operating characteristics, advantages/disadvantages, and examples of different pump designs are provided. Factors that affect pump performance and potential problems that can occur are also summarized.
The document discusses various types of pumps including centrifugal pumps, positive displacement pumps, and reciprocating pumps. It describes the main components and working principles of centrifugal pumps, including the impeller, casing, suction and delivery pipes, and shaft. Centrifugal pumps work by using an impeller to impart kinetic energy to the fluid and a volute casing to convert this to pressure. Reciprocating pumps use pistons while positive displacement pumps include gear pumps.
Week 4 pe 3231 pump cyl mot tank accu sho abs rev oct 16 finalCharlton Inao
This document provides information about hydraulic pumps, motors, cylinders, and power packs/tanks. It defines different types of pumps including gear, vane, and piston pumps. It also discusses motors including gear, vane, and piston motors. It describes the components and functions of hydraulic cylinders and power packs/tanks including reservoirs, baffles, and sizing considerations. The key objectives are to understand different input and output devices used in hydraulic systems.
Air Distribution & Hydraulics lecture-5Javaid Toosy
Positive displacement pumps (PDP) transfer liquid from the suction to discharge side with each cycle. Dynamic or non-PDP pumps allow fluid to circulate if the discharge is shut off. PDPs can be reciprocating, rotary, or diaphragm. Reciprocating pumps use pistons and check valves. Rotary pumps use gears, screws, or vanes to trap fluid. Gear pumps use meshing gears. Screw pumps use helical screws. Vane pumps use sliding vanes in a cammed housing. Diaphragm pumps use a reciprocating diaphragm instead of pistons.
Rotodynamic pumps can be axial flow, mixed flow, or centrifugal. Axial and mixed flow pumps are commonly used for high-volume, low-pressure applications like water supplies, flood control, and irrigation. They generate head pressure through axial, radial, or a combination of motions. Mixed flow pumps produce greater head pressure than axial pumps alone.
Pumps are used to deliver hydraulic fluid throughout a hydraulic circuit. There are two main types of pumps - positive displacement pumps and non-positive displacement pumps. Positive displacement pumps precisely regulate fluid output with each cycle, while non-positive displacement pumps like centrifugal pumps rely on fluid velocity to move fluid and output varies with pressure. Common positive displacement pump designs include gear pumps, vane pumps, and piston pumps which use rotating gears, vanes, or pistons to draw fluid in and push it out in fixed volumes. Selection of the appropriate pump type depends on factors like operating pressure, flow requirements, drive type, and tolerance to contamination.
Pumps move fluid from one place to another by converting energy into hydraulic energy and pressure. There are several types of pumps including positive displacement pumps which apply direct pressure on the fluid. Reciprocating positive displacement pumps use pistons, plungers or diaphragms and valves to move fluid in an oscillating motion. Specific examples described include piston pumps such as lift pumps and force pumps, axial piston pumps which have pistons arranged circularly in a housing, and diaphragm pumps which use a reciprocating diaphragm and valves to pump fluid.
A pump is a mechanical device that uses mechanical action to move fluids from one place to another. There are two main types of pumps: positive displacement pumps and hydrodynamic pumps. Positive displacement pumps work by trapping a fixed amount of fluid and forcing it to the discharge side, including types like reciprocating pumps (piston pumps, plunger pumps, diaphragm pumps), rotary pumps (gear pumps, screw pumps, lobe pumps, vane pumps). Reciprocating positive displacement pumps include piston pumps, diaphragm pumps, and plunger pumps. Piston pumps can be further divided into types like axial piston pumps and radial piston pumps.
This document provides information on various types of pumps used in hydraulic systems. It discusses the basic classifications of pumps as either positive displacement pumps or non-positive displacement pumps. Positive displacement pumps deliver a fixed volume of fluid per cycle, while non-positive displacement pumps output depends on resistance. Common positive displacement pump types described include gear pumps, vane pumps, piston pumps, and lobe pumps. Operating characteristics, advantages/disadvantages, and examples of different pump designs are provided. Factors that affect pump performance and potential problems that can occur are also summarized.
The document discusses various types of pumps including centrifugal pumps, positive displacement pumps, and reciprocating pumps. It describes the main components and working principles of centrifugal pumps, including the impeller, casing, suction and delivery pipes, and shaft. Centrifugal pumps work by using an impeller to impart kinetic energy to the fluid and a volute casing to convert this to pressure. Reciprocating pumps use pistons while positive displacement pumps include gear pumps.
Week 4 pe 3231 pump cyl mot tank accu sho abs rev oct 16 finalCharlton Inao
This document provides information about hydraulic pumps, motors, cylinders, and power packs/tanks. It defines different types of pumps including gear, vane, and piston pumps. It also discusses motors including gear, vane, and piston motors. It describes the components and functions of hydraulic cylinders and power packs/tanks including reservoirs, baffles, and sizing considerations. The key objectives are to understand different input and output devices used in hydraulic systems.
Air Distribution & Hydraulics lecture-5Javaid Toosy
Positive displacement pumps (PDP) transfer liquid from the suction to discharge side with each cycle. Dynamic or non-PDP pumps allow fluid to circulate if the discharge is shut off. PDPs can be reciprocating, rotary, or diaphragm. Reciprocating pumps use pistons and check valves. Rotary pumps use gears, screws, or vanes to trap fluid. Gear pumps use meshing gears. Screw pumps use helical screws. Vane pumps use sliding vanes in a cammed housing. Diaphragm pumps use a reciprocating diaphragm instead of pistons.
Rotodynamic pumps can be axial flow, mixed flow, or centrifugal. Axial and mixed flow pumps are commonly used for high-volume, low-pressure applications like water supplies, flood control, and irrigation. They generate head pressure through axial, radial, or a combination of motions. Mixed flow pumps produce greater head pressure than axial pumps alone.
This presentation contains information about pumps used in industrial hydraulics. gear pump, vane pump, piston pump. it is useful for engineering students
• A pump is the heart of the hydraulic system, convert mechanical energy into hydraulic energy.
• Main purpose of the pump is to create the flow of oil through the system & thus assist transfer of power & motion.
• The combined pumping and driving motor unit is known as hydraulic pump.
• The hydraulic pump takes hydraulic fluid (mostly some oil) from the storage tank and delivers it to the rest of the hydraulic circuit.
• In general, the speed of pump is constant and the pump delivers an equal volume of oil in each revolution.
This document provides information on centrifugal and reciprocating pumps. It discusses the working principles, components, usages, and efficiencies of each pump type. For centrifugal pumps, the document explains how the impeller uses centrifugal force to move fluid outward from the center. It also covers volumetric, manometric, and mechanical efficiencies. For reciprocating pumps, it describes the single-acting and double-acting designs and how the reciprocating piston moves fluid in and out of the cylinder in each case. Common applications of each pump type are also listed.
Quick And Dirty Guide to Rotary Positive Displacement PumpsCrane Engineering
Ever wondered what the difference was between external gear and rotary vane pumps? Check out this short SlideShare to see the differences between a number of positive displacement pumps, their advantages and disadvantages.
Pump and pumps classification.Introduction of Pumps.Applications of Pumps.Types of pump.Centrifugal Pump. Diaphragm pump.lobe pump.Positive displacement pump
Gear pump. Uses of pump.
This document provides an introduction to different types of pumping equipment, including their principles of operation and categories. It discusses the main differences between rotodynamic pumps (like centrifugal pumps) and positive displacement pumps (like reciprocating and rotary pumps). Centrifugal pumps are best for medium to high flow rates and low to medium pressures, while positive displacement pumps can achieve very high pressures or handle low flows. The document also compares characteristics like flow patterns, pressure capabilities, cost considerations, and fluid handling for different pump categories.
Hydraulic pumps convert mechanical energy into pressure energy by using a prime mover to mechanically act on liquid. There are two main types of pumps: rotodynamic pumps which use kinetic energy to provide continuous flow, such as centrifugal pumps; and positive-displacement pumps which displace a fixed volume of liquid per cycle through close tolerances, such as piston pumps and gear pumps. Positive-displacement pumps are often used for high viscosity liquids, high pressure applications, or where high accuracy of liquid delivery is required.
Pump, its types and applications presentationziaul islam
This document discusses different types of pumps. It begins by defining a pump as a machine that converts mechanical energy into fluid energy by moving fluid from a region of low pressure to one of high pressure. There are two main types of pumps: positive displacement pumps and rotodynamic pumps. Positive displacement pumps work by trapping a fixed amount of fluid and forcing it into the discharge pipe. Rotodynamic pumps use rotational kinetic energy to increase the fluid's hydrodynamic energy. The document then discusses various sub-types of positive displacement pumps like gear pumps, screw pumps, and reciprocating pumps. It also covers different rotodynamic pump types such as centrifugal pumps, axial pumps, mixed-flow pumps, and turbine pumps. The document
This document provides information about various types of pumps. It discusses centrifugal pumps, rotary pumps, reciprocating pumps, and deep well pumps. It also covers pump classification, fundamental pump equations, centrifugal pump priming, positive displacement pumps, and plunger pumps. The key details covered include the operating principles of centrifugal, rotary, and reciprocating pumps. It also defines total dynamic head, fluid power, discharge, brake power, and efficiency equations.
Pumps can be classified as positive displacement pumps or nonpositive displacement pumps. Positive displacement pumps include gear pumps, vane pumps, piston pumps, and lobe pumps. Gear pumps are further classified as external gear pumps and internal gear pumps. External gear pumps have straight or helical gears that transport fluid through the expanding and contracting space between gears. Internal gear pumps have gears that remain constantly meshed to pump fluid. Vane pumps use a rotor with sliding vanes to pump fluid, and can be balanced or unbalanced. Piston pumps use reciprocating pistons to draw in and expel fluid and include axial, radial, and bent-axis configurations. Each pump type has different operating characteristics, advantages, and limitations for various industrial
The document discusses different types of pumps used in fluid flow creation and hydraulics applications. It distinguishes between positive displacement pumps, which displace a fixed volume of fluid per revolution, and non-positive displacement pumps, which use fluid inertia to displace fluid. The document goes on to describe various positive displacement pump types including gear pumps, vane pumps, piston pumps, and how their principles of operation differ. It also covers classifications such as fixed vs variable displacement and pressure compensation in pumps.
Pumps are mechanical devices that use external power to transfer fluids from one point to another. There are two main types of pumps: positive displacement pumps and rotodynamic pumps. Positive displacement pumps include reciprocating pumps, rotary lobe pumps, progressing cavity pumps, piston/plunger pumps, dosing pumps, and vacuum pumps. Rotodynamic pumps include centrifugal pumps. Each pump type has different characteristics that make it suitable for various fluid transfer applications.
Pumps are devices that use mechanical action to move fluids or slurries. There are two main types of pumps: positive displacement pumps and variable displacement pumps. Positive displacement pumps deliver a constant volume with varying pressure by alternately filling and displacing a chamber. Variable displacement pumps can change their volume based on pressure, discharge, and head. Common positive displacement pump examples include reciprocating pumps, axial piston pumps, and gear pumps, while centrifugal pumps are a common type of variable displacement pump.
Positive displacement pumps displace a fixed volume of fluid with each cycle or rotation. They are capable of developing high pressures at low suction pressures, unlike centrifugal pumps whose capacity is affected by outlet pressure. There are two main types of positive displacement pumps: rotary pumps which displace a fixed volume per revolution using components like gears or screws; and reciprocating pumps which use pistons or diaphragms moving back and forth in a cylinder. Reciprocating pumps are generally more efficient and suitable for high-pressure, low-volume applications while rotary pumps have lower fuel consumption and noise. Both have advantages for different industrial uses.
This document discusses different types of pumps. It describes hydrodynamic or centrifugal pumps, which use centrifugal force to move fluid and are used for low pressure, high volume applications. It also describes hydrostatic or positive displacement pumps, which use close-fitting components to move a fixed amount of fluid with each cycle and can handle higher pressures. The document provides examples of different types of positive displacement pumps, including gear, vane, and piston pumps, and describes their applications. It also provides details on centrifugal pump components and operation.
Pumps add energy to liquids or gases, increasing their pressure and enabling movement. Common pumps include reciprocating pumps, which use pistons, and centrifugal pumps, which use rapidly rotating impellers to impart centrifugal force. Reciprocating pumps are self-priming but have more complex construction, while centrifugal pumps require priming but have simpler construction. Proper pump selection and operation is important to avoid issues like cavitation.
This document discusses different types of pumps used in fluid mechanics. It covers positive displacement pumps like reciprocating, rotary, and diaphragm pumps. It also covers dynamic pumps known as centrifugal pumps. For centrifugal pumps, it describes the main parts including casing, shaft, impeller, diffuser, and wearing rings. It discusses different types of impellers and volute casings. Centrifugal pumps can be radial flow, axial flow, or mixed flow. The document also covers concepts like cavitation, net positive suction head, and priming of centrifugal pumps.
Pumps are mechanical devices that use prime mover energy to move fluids from one place to another. Positive displacement pumps apply pressure directly to the liquid using reciprocating or rotating components. The main types of positive displacement pumps are reciprocating pumps like piston pumps and diaphragm pumps, and rotary pumps like gear pumps. Reciprocating piston pumps use oscillating pistons to move fluid, and can be single or multi-cylinder designs. Axial and radial piston pumps use rotating cylinders to pump fluid. Diaphragm pumps use a reciprocating rubber diaphragm and check valves to pump fluid on each stroke. Positive displacement pumps are suitable for high-pressure applications and handling viscous or abrasive fluids.
This document discusses hydraulic pumps used in industry. It begins by listing learning objectives related to classifying pumps, explaining their workings, and evaluating performance. It then defines the functions of pumps in converting mechanical to hydraulic energy. Pumps are classified as positive displacement or non-positive displacement, based on constant/variable delivery, and rotary/reciprocating motion. Key differences between these types are outlined. Specific pump types like gear, vane and piston are described in more detail regarding their construction, advantages, and uses.
This presentation contains information about pumps used in industrial hydraulics. gear pump, vane pump, piston pump. it is useful for engineering students
• A pump is the heart of the hydraulic system, convert mechanical energy into hydraulic energy.
• Main purpose of the pump is to create the flow of oil through the system & thus assist transfer of power & motion.
• The combined pumping and driving motor unit is known as hydraulic pump.
• The hydraulic pump takes hydraulic fluid (mostly some oil) from the storage tank and delivers it to the rest of the hydraulic circuit.
• In general, the speed of pump is constant and the pump delivers an equal volume of oil in each revolution.
This document provides information on centrifugal and reciprocating pumps. It discusses the working principles, components, usages, and efficiencies of each pump type. For centrifugal pumps, the document explains how the impeller uses centrifugal force to move fluid outward from the center. It also covers volumetric, manometric, and mechanical efficiencies. For reciprocating pumps, it describes the single-acting and double-acting designs and how the reciprocating piston moves fluid in and out of the cylinder in each case. Common applications of each pump type are also listed.
Quick And Dirty Guide to Rotary Positive Displacement PumpsCrane Engineering
Ever wondered what the difference was between external gear and rotary vane pumps? Check out this short SlideShare to see the differences between a number of positive displacement pumps, their advantages and disadvantages.
Pump and pumps classification.Introduction of Pumps.Applications of Pumps.Types of pump.Centrifugal Pump. Diaphragm pump.lobe pump.Positive displacement pump
Gear pump. Uses of pump.
This document provides an introduction to different types of pumping equipment, including their principles of operation and categories. It discusses the main differences between rotodynamic pumps (like centrifugal pumps) and positive displacement pumps (like reciprocating and rotary pumps). Centrifugal pumps are best for medium to high flow rates and low to medium pressures, while positive displacement pumps can achieve very high pressures or handle low flows. The document also compares characteristics like flow patterns, pressure capabilities, cost considerations, and fluid handling for different pump categories.
Hydraulic pumps convert mechanical energy into pressure energy by using a prime mover to mechanically act on liquid. There are two main types of pumps: rotodynamic pumps which use kinetic energy to provide continuous flow, such as centrifugal pumps; and positive-displacement pumps which displace a fixed volume of liquid per cycle through close tolerances, such as piston pumps and gear pumps. Positive-displacement pumps are often used for high viscosity liquids, high pressure applications, or where high accuracy of liquid delivery is required.
Pump, its types and applications presentationziaul islam
This document discusses different types of pumps. It begins by defining a pump as a machine that converts mechanical energy into fluid energy by moving fluid from a region of low pressure to one of high pressure. There are two main types of pumps: positive displacement pumps and rotodynamic pumps. Positive displacement pumps work by trapping a fixed amount of fluid and forcing it into the discharge pipe. Rotodynamic pumps use rotational kinetic energy to increase the fluid's hydrodynamic energy. The document then discusses various sub-types of positive displacement pumps like gear pumps, screw pumps, and reciprocating pumps. It also covers different rotodynamic pump types such as centrifugal pumps, axial pumps, mixed-flow pumps, and turbine pumps. The document
This document provides information about various types of pumps. It discusses centrifugal pumps, rotary pumps, reciprocating pumps, and deep well pumps. It also covers pump classification, fundamental pump equations, centrifugal pump priming, positive displacement pumps, and plunger pumps. The key details covered include the operating principles of centrifugal, rotary, and reciprocating pumps. It also defines total dynamic head, fluid power, discharge, brake power, and efficiency equations.
Pumps can be classified as positive displacement pumps or nonpositive displacement pumps. Positive displacement pumps include gear pumps, vane pumps, piston pumps, and lobe pumps. Gear pumps are further classified as external gear pumps and internal gear pumps. External gear pumps have straight or helical gears that transport fluid through the expanding and contracting space between gears. Internal gear pumps have gears that remain constantly meshed to pump fluid. Vane pumps use a rotor with sliding vanes to pump fluid, and can be balanced or unbalanced. Piston pumps use reciprocating pistons to draw in and expel fluid and include axial, radial, and bent-axis configurations. Each pump type has different operating characteristics, advantages, and limitations for various industrial
The document discusses different types of pumps used in fluid flow creation and hydraulics applications. It distinguishes between positive displacement pumps, which displace a fixed volume of fluid per revolution, and non-positive displacement pumps, which use fluid inertia to displace fluid. The document goes on to describe various positive displacement pump types including gear pumps, vane pumps, piston pumps, and how their principles of operation differ. It also covers classifications such as fixed vs variable displacement and pressure compensation in pumps.
Pumps are mechanical devices that use external power to transfer fluids from one point to another. There are two main types of pumps: positive displacement pumps and rotodynamic pumps. Positive displacement pumps include reciprocating pumps, rotary lobe pumps, progressing cavity pumps, piston/plunger pumps, dosing pumps, and vacuum pumps. Rotodynamic pumps include centrifugal pumps. Each pump type has different characteristics that make it suitable for various fluid transfer applications.
Pumps are devices that use mechanical action to move fluids or slurries. There are two main types of pumps: positive displacement pumps and variable displacement pumps. Positive displacement pumps deliver a constant volume with varying pressure by alternately filling and displacing a chamber. Variable displacement pumps can change their volume based on pressure, discharge, and head. Common positive displacement pump examples include reciprocating pumps, axial piston pumps, and gear pumps, while centrifugal pumps are a common type of variable displacement pump.
Positive displacement pumps displace a fixed volume of fluid with each cycle or rotation. They are capable of developing high pressures at low suction pressures, unlike centrifugal pumps whose capacity is affected by outlet pressure. There are two main types of positive displacement pumps: rotary pumps which displace a fixed volume per revolution using components like gears or screws; and reciprocating pumps which use pistons or diaphragms moving back and forth in a cylinder. Reciprocating pumps are generally more efficient and suitable for high-pressure, low-volume applications while rotary pumps have lower fuel consumption and noise. Both have advantages for different industrial uses.
This document discusses different types of pumps. It describes hydrodynamic or centrifugal pumps, which use centrifugal force to move fluid and are used for low pressure, high volume applications. It also describes hydrostatic or positive displacement pumps, which use close-fitting components to move a fixed amount of fluid with each cycle and can handle higher pressures. The document provides examples of different types of positive displacement pumps, including gear, vane, and piston pumps, and describes their applications. It also provides details on centrifugal pump components and operation.
Pumps add energy to liquids or gases, increasing their pressure and enabling movement. Common pumps include reciprocating pumps, which use pistons, and centrifugal pumps, which use rapidly rotating impellers to impart centrifugal force. Reciprocating pumps are self-priming but have more complex construction, while centrifugal pumps require priming but have simpler construction. Proper pump selection and operation is important to avoid issues like cavitation.
This document discusses different types of pumps used in fluid mechanics. It covers positive displacement pumps like reciprocating, rotary, and diaphragm pumps. It also covers dynamic pumps known as centrifugal pumps. For centrifugal pumps, it describes the main parts including casing, shaft, impeller, diffuser, and wearing rings. It discusses different types of impellers and volute casings. Centrifugal pumps can be radial flow, axial flow, or mixed flow. The document also covers concepts like cavitation, net positive suction head, and priming of centrifugal pumps.
Pumps are mechanical devices that use prime mover energy to move fluids from one place to another. Positive displacement pumps apply pressure directly to the liquid using reciprocating or rotating components. The main types of positive displacement pumps are reciprocating pumps like piston pumps and diaphragm pumps, and rotary pumps like gear pumps. Reciprocating piston pumps use oscillating pistons to move fluid, and can be single or multi-cylinder designs. Axial and radial piston pumps use rotating cylinders to pump fluid. Diaphragm pumps use a reciprocating rubber diaphragm and check valves to pump fluid on each stroke. Positive displacement pumps are suitable for high-pressure applications and handling viscous or abrasive fluids.
This document discusses hydraulic pumps used in industry. It begins by listing learning objectives related to classifying pumps, explaining their workings, and evaluating performance. It then defines the functions of pumps in converting mechanical to hydraulic energy. Pumps are classified as positive displacement or non-positive displacement, based on constant/variable delivery, and rotary/reciprocating motion. Key differences between these types are outlined. Specific pump types like gear, vane and piston are described in more detail regarding their construction, advantages, and uses.
Pumps are machines that use mechanical action to move fluids by increasing pressure or lifting them against gravity. There are two main types of pumps: positive displacement pumps and centrifugal pumps. Positive displacement pumps work by trapping a fixed amount of fluid and forcing it into the discharge pipe with a piston, plunger, gears, lobes or diaphragm. Centrifugal pumps use centrifugal force from an impeller to accelerate and direct fluid outwards into a discharge pipe. Proper maintenance is important for pump efficiency and performance.
This document provides an overview of reciprocating pumps. It discusses the key components of reciprocating pumps like pistons, cranks, and valves. It describes different types of reciprocating pumps such as single acting, double acting, and multi-cylinder pumps. Specific pump types - plunger pumps and diaphragm pumps - are explained in more detail including their working principles, advantages, disadvantages, and applications. A comparison is made between reciprocating and centrifugal pumps. Finally, the advantages and disadvantages of reciprocating pumps in general are summarized.
1) Pumps are devices that use mechanical energy to move fluids by increasing their velocity, pressure, or elevation. There are two main types - positive displacement pumps which move a fixed volume of fluid, and dynamic pumps which develop high fluid velocity and convert it to pressure.
2) Positive displacement pumps include rotary pumps like gear, screw, lobe and vane pumps which move fluid from an inlet to outlet as a chamber rotates. Reciprocating pumps use pistons or plungers on an intake and discharge stroke.
3) Common dynamic pumps are centrifugal pumps which use an impeller and casing to discharge fluid at high velocity converted to pressure, and axial pumps which develop pressure via propeller action on
This document provides an overview of different types of mechanical pumps, including:
- Positive displacement pumps like gear pumps, vane pumps, piston pumps, and diaphragm pumps.
- Dynamic pumps like centrifugal pumps and axial pumps.
- Details are given on pump components, design considerations for suction piping, and characteristics of specific pump types like centrifugal pumps, screw pumps, and membrane pumps.
Hydraulic pumps convert mechanical energy into hydraulic energy by drawing in hydraulic fluid and pressurizing it. The two main types are dynamic pumps and positive displacement pumps. Positive displacement pumps are universally used in hydraulic systems as they can generate high pressures and are well-suited to overcoming system resistances. Common positive displacement pump designs include gear pumps and piston pumps.
Pumps are devices that use mechanical energy to increase the velocity, pressure, or elevation of liquids and gases. There are two main types of pumps: positive displacement pumps and dynamic pumps. Positive displacement pumps apply pressure directly to the fluid using reciprocating or rotating components like pistons, plungers, or gears. Dynamic pumps like centrifugal pumps use an impeller to impart kinetic energy and convert it to pressure energy. Key factors in pump performance include head, which measures pressure energy, and net positive suction head (NPSH), which must be sufficient to prevent cavitation damage to the pump.
Hydraulic machines use fluid motion to convert between hydraulic energy and mechanical energy. There are two main types - hydraulic turbines which convert hydraulic energy to mechanical energy, and hydraulic pumps/compressors which convert mechanical energy to hydraulic energy. Pumps are then further classified based on their displacement and pumping motion, with the main types being centrifugal pumps and positive displacement pumps such as gear pumps. Centrifugal pumps use centrifugal force from an impeller to provide continuous flow, while positive displacement pumps eject fixed quantities of fluid per revolution through mechanisms like reciprocating motion or meshing gears.
Pumps are devices that use mechanical energy to increase the velocity, pressure, or elevation of liquids and gases. There are two main types of pumps: positive displacement pumps and dynamic pumps. Positive displacement pumps apply direct pressure on a liquid using a reciprocating piston or rotating components. Dynamic pumps use centrifugal force to generate high rotational velocities and convert the kinetic energy of liquids into pressure energy. Common positive displacement pump types include piston pumps, plunger pumps, and diaphragm pumps. Common dynamic pump types include centrifugal pumps which contain an impeller and casing. Proper consideration of factors like net positive suction head are important for pump selection and operation.
The document discusses different types of pumps used to transport liquids and gases. It describes pumps as mechanical devices that use pressure or suction to move fluids by forcing them in a specified direction. There are two main types of pumps - positive displacement pumps which deliver a fixed volume of fluid per cycle, and non-positive displacement pumps which do not control volume but can attain high pressures and flows. Examples of specific pump types discussed include centrifugal pumps, gear pumps, liquid ring pumps, screw pumps, piston pumps, and multistage centrifugal pumps. The document also addresses potential problems with pump operation like overloading or operating at excess speed.
Introduction to Pumps , Compressors,Fans & Blowers.pdfSana Khan
Centrifugal and positive displacement pumps are the two main categories of pumps. Centrifugal pumps use a rotating impeller to increase the velocity and pressure of a fluid. Positive displacement pumps use reciprocating or rotary mechanisms to move a fixed volume of fluid with each cycle. Common types of positive displacement pumps include piston pumps, plunger pumps, gear pumps, lobe pumps, and screw pumps. The performance of a pump can be shown through a pump curve, with head on the y-axis and flow rate on the x-axis. When a pump curve is overlaid with a system curve showing head loss versus flow rate, their point of intersection indicates the pump's operating point when used in that system.
INTRODUCTION TO PUMPS, COMPRESSORS, FANS & BLOWERS.pdfBagusSigit3
Centrifugal pumps operate by using a rotating impeller to impart velocity energy to the fluid being pumped. As the fluid passes through the impeller blades, it is accelerated outward and converted to pressure energy upon exiting the pump casing. There are two main categories of pumps - positive displacement pumps which move a fixed volume of fluid per rotation, and centrifugal pumps which increase fluid velocity and pressure through centrifugal action. Centrifugal pumps are commonly used and consist of an impeller, casing, and volute. Pump performance is represented by curves showing head versus flow rate. The operating point occurs where the pump curve intersects the system curve for a given application.
This document discusses different types of pumps used to move fluids. It describes positive displacement pumps, which work by trapping a fixed amount of fluid and forcing it out. Positive displacement pumps include rotary pumps like gear pumps and screw pumps, as well as reciprocating pumps like piston pumps. It also describes centrifugal pumps, which work by spinning an impeller to increase fluid velocity and pressure. Other pump types discussed include hydraulic ram pumps, jet pumps, gravity pumps, and valveless pumps. The document provides details on the mechanisms and applications of these various pump types.
PUMP in ........................................................................sizzack548
Pumps are devices that use mechanical energy to increase the velocity, pressure, or elevation of liquids and gases. There are two main types of pumps: positive displacement pumps and dynamic pumps. Positive displacement pumps apply pressure directly to the fluid using reciprocating or rotating components, while dynamic pumps like centrifugal pumps use rotation to impart kinetic energy and convert it to pressure energy. Common positive displacement pump types include piston pumps, plunger pumps, gear pumps, lobe pumps, screw pumps, and diaphragm pumps. Centrifugal pumps are widely used dynamic pumps that contain an impeller and casing and work by accelerating fluid outwards from the center of rotation.
Pumps are devices that use mechanical energy to increase the velocity, pressure, or elevation of fluids. There are two main types of pumps: positive displacement pumps and dynamic pumps. Positive displacement pumps apply pressure directly to fluids using reciprocating or rotating components, while dynamic pumps like centrifugal pumps use impellers to impart kinetic energy and convert it to pressure energy. Key factors in pump performance include types of heads like suction head, discharge head, and total head. Cavitation can occur if a pump's net positive suction head available is less than required.
Introduction, classification, principle of working and constructional details of vane pumps, gear pumps, radial and axial plunger pumps, screw pumps, power and efficiency calculations, characteristics curves, selection of pumps for hydraulic Power transmission.
Pumps move fluids like liquids and gases using mechanical action. There are many types of pumps that use different mechanisms and energy sources. Positive displacement pumps trap and displace a fixed volume of fluid with each cycle. Common types are reciprocating pumps like piston and plunger pumps and diaphragm pumps. Rotary pumps use rotating gears, lobes, screws, or vanes to pump fluid. Centrifugal pumps use an impeller and centrifugal force to move fluid outward, while turbine pumps combine high pressure and flexible operation.
This Presentation is about working principle of Pumps.Basic Presentation regarding pumps , will definitely help beginners to learn pump types , their working , their parts etc.
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...IJECEIAES
Climate change's impact on the planet forced the United Nations and governments to promote green energies and electric transportation. The deployments of photovoltaic (PV) and electric vehicle (EV) systems gained stronger momentum due to their numerous advantages over fossil fuel types. The advantages go beyond sustainability to reach financial support and stability. The work in this paper introduces the hybrid system between PV and EV to support industrial and commercial plants. This paper covers the theoretical framework of the proposed hybrid system including the required equation to complete the cost analysis when PV and EV are present. In addition, the proposed design diagram which sets the priorities and requirements of the system is presented. The proposed approach allows setup to advance their power stability, especially during power outages. The presented information supports researchers and plant owners to complete the necessary analysis while promoting the deployment of clean energy. The result of a case study that represents a dairy milk farmer supports the theoretical works and highlights its advanced benefits to existing plants. The short return on investment of the proposed approach supports the paper's novelty approach for the sustainable electrical system. In addition, the proposed system allows for an isolated power setup without the need for a transmission line which enhances the safety of the electrical network
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
Advanced control scheme of doubly fed induction generator for wind turbine us...IJECEIAES
This paper describes a speed control device for generating electrical energy on an electricity network based on the doubly fed induction generator (DFIG) used for wind power conversion systems. At first, a double-fed induction generator model was constructed. A control law is formulated to govern the flow of energy between the stator of a DFIG and the energy network using three types of controllers: proportional integral (PI), sliding mode controller (SMC) and second order sliding mode controller (SOSMC). Their different results in terms of power reference tracking, reaction to unexpected speed fluctuations, sensitivity to perturbations, and resilience against machine parameter alterations are compared. MATLAB/Simulink was used to conduct the simulations for the preceding study. Multiple simulations have shown very satisfying results, and the investigations demonstrate the efficacy and power-enhancing capabilities of the suggested control system.
Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
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ACEP Magazine edition 4th launched on 05.06.2024Rahul
This document provides information about the third edition of the magazine "Sthapatya" published by the Association of Civil Engineers (Practicing) Aurangabad. It includes messages from current and past presidents of ACEP, memories and photos from past ACEP events, information on life time achievement awards given by ACEP, and a technical article on concrete maintenance, repairs and strengthening. The document highlights activities of ACEP and provides a technical educational article for members.
Batteries -Introduction – Types of Batteries – discharging and charging of battery - characteristics of battery –battery rating- various tests on battery- – Primary battery: silver button cell- Secondary battery :Ni-Cd battery-modern battery: lithium ion battery-maintenance of batteries-choices of batteries for electric vehicle applications.
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Embedded machine learning-based road conditions and driving behavior monitoringIJECEIAES
Car accident rates have increased in recent years, resulting in losses in human lives, properties, and other financial costs. An embedded machine learning-based system is developed to address this critical issue. The system can monitor road conditions, detect driving patterns, and identify aggressive driving behaviors. The system is based on neural networks trained on a comprehensive dataset of driving events, driving styles, and road conditions. The system effectively detects potential risks and helps mitigate the frequency and impact of accidents. The primary goal is to ensure the safety of drivers and vehicles. Collecting data involved gathering information on three key road events: normal street and normal drive, speed bumps, circular yellow speed bumps, and three aggressive driving actions: sudden start, sudden stop, and sudden entry. The gathered data is processed and analyzed using a machine learning system designed for limited power and memory devices. The developed system resulted in 91.9% accuracy, 93.6% precision, and 92% recall. The achieved inference time on an Arduino Nano 33 BLE Sense with a 32-bit CPU running at 64 MHz is 34 ms and requires 2.6 kB peak RAM and 139.9 kB program flash memory, making it suitable for resource-constrained embedded systems.
2. What is a pump?
Pump is defined as a mechanical device that rotates or
reciprocates to move fluid from one place to another.
It converts Prime mover energy in to mechanical
energy , then mechanical energy into hydraulic
energy ( flow, pressure ).
3. Need Of a Pump
Used to pump a liquid from lower pressure area to a
High pressure area.
To increase Flow rate.
To move liquid from lower elevation to higher
elevation.
4. Different types of pump
Pumps
Hydrostatic or
positive
displacement pump
Hydro
Dynamic
Rotary Reciprocating Centrifugal Axial
5. Hydrostatic or
Positive Displacement Pump
Working Principle:
A positive displacement pump makes a fluid move by
trapping a fixed amount and forcing (displacing) that
trapped volume into the discharge pipe.
Some positive displacement pumps use an expanding
cavity on the suction side and a decreasing cavity on the
discharge side. Liquid flows into the pump as the cavity
on the suction side expands and the liquid flows out of the
discharge as the cavity collapses
6. Positive Displacement Pump
For each pump revolution
• Fixed amount of liquid taken from one end
• Positively discharged at other end
• a specific amount of fluid passes through the pump for each
rotation
If pipe blocked
• Pressure rises
• Can damage pump
• In order to avoid this happening, Relief valve is required
Used for pumping fluids other than water
7. Positive Displacement Pump
Positive Displacement pumps apply pressure directly to the liquid
by a reciprocating piston, or by rotating members.
Uses:
• can handle shear sensitive liquid.
• Use for high pressure application
• Use for variable viscosity applications.
Different Types
1. Reciprocating pump
2. Rotary pump
9. Reciprocating Positive
Displacement Pumps
Reciprocating pumps move the fluid using one or more
oscillating pistons, plungers, or membranes (diaphragms),
while valves restrict fluid motion to the desired direction.
Pumps in this category range from simplex, with one cylinder,
to in some cases quad (four) cylinders, or more. Many
reciprocating-type pumps are duplex (two) or triplex (three)
cylinder. They can be either single-acting with suction during
one direction of piston motion and discharge on the other,
or double-acting with suction and discharge in both directions.
The pumps can be powered manually, by air or steam, or by a
belt driven by an engine.
10. Reciprocating Positive
Displacement Pumps
1.Piston pump
A piston pump is a type of positive displacement
pump where the high-pressure seal reciprocates with the
piston. Piston pumps can be used to move liquids or
compress gases.
Types
1. Lift pump
2. Force pump
3. Axial piston pump
4. Radial piston pump
11. Reciprocating Positive
Displacement Pumps
1.1 Lift pump
In a lift pump, the upstroke of the
piston draws water, through a valve, into
the lower part of the cylinder. On the
down stroke, water passes through
valves, set in the piston, into the upper
part of the cylinder. On the next
upstroke, water is discharged from the
upper part of the cylinder via a spout.
12. Reciprocating Positive
Displacement Pumps
1.2 Force pump
In a force pump, the
upstroke of the piston draws water,
through a valve, into the cylinder.
On the down stroke, the water is
discharged, through a valve, into
the outlet pipe. And this has the
same mode of application as a lift
pump.
13. Reciprocating Positive
Displacement Pumps
1.3 Axial Piston Pump
An axial piston pump is a positive displacement pump
that has a number of pistons arranged in a circular array within a
housing which is commonly referred to as a cylinder block, rotor
or barrel. This cylinder block is driven to rotate about its axis of
symmetry by an integral shaft that is, more or less, aligned with
the pumping pistons (usually parallel but not necessarily).
15. Reciprocating Positive
Displacement Pumps
1.3 Axial Piston Pump
ADVANTAGES
high efficiency
high pressure
low noise level
very high load at lowest speed due to the hydrostatically balancedparts
possible
high reliability
DISADVANTAGES
Piston pumps cost more per unit to run compared to centrifugal and roller
pumps.
The mechanical parts are prone to wear , so the maintenance costs can be
high.
Piston pumps are heavy due to their large
16. Reciprocating Positive
Displacement Pumps
1.3 Axial PistonPump
COMPATIBILITY
Due to the hydrostatically balanced parts it is possible to use the pump
with various hydraulic fluids like
Mineral oil
Biodegradable oil
HFA (oil in water)
HFC (water-glycol)
HFD (synthetic ester) or cutting emulsion
APPLICATION
automotive sector (e.g., automatic transmission, hydraulic suspension control in
upper-class cars)
hydraulic systems of jet aircraft, being gear-driven off of the turbine engine's
main shaft
17. Reciprocating Positive
Displacement Pumps
1.4 Radial piston pump
A radial piston pump
is a form of hydraulic pump.
The working pistons extend
in a radial direction
symmetrically around the
drive shaft, in contrast to the
axial piston pump.
18. Reciprocating Positive
Displacement Pumps
1.4 Radial piston pump
The stroke of each piston is
caused by an eccentric drive
shaft or an external eccentric
tappet.
When filling the workspace
of the pumping pistons from
"inside" (e.g., over a hollow
shaft) it is called an inside
impinged radial piston pump.
If the workspace is filled
from "outside" it's called
an outside impinged radial
piston pump.
Outside impinged radial piston pump
19. Reciprocating Positive
Displacement Pumps
1.4 Radial piston pump
ADVANTAGES
high efficiency
high pressure (up to 1,000 bar)
low flow and pressure ripple (due
to the small dead volume in the
workspace of the pumping piston)
low noise level
very high load at lowest speed due
to the hydrostatically balanced
parts possible
no axial internal forces at the drive
shaft bearing
high reliability
Inside impinged radial piston pump
20. Reciprocating Positive
Displacement Pumps
1.4 Radial piston pump
DISADVANTAGES
A disadvantage are the bigger radial dimensions in comparison to
the axial piston pump, but it could be compensated with the shorter
construction in axial direction.
COMPATIBILITY
Due to the hydrostatically balanced parts it is possible to use
the pump with various hydraulic fluids like
Mineral oil
Biodegradable oil
HFA(oil in water)
HFC (water-glycol)
HFD (synthetic ester) or cutting emulsion.
21. Reciprocating Positive
Displacement Pumps
1.4 Radial piston pump
APPLICATIONS
Radial piston pumps are used in applications that involve high pressures (operating
pressures above 400 bar and up to 700 bar), such as presses, machines for
processing plastic and machine tools that clamp hydraulics. Radial piston pumps are
the only pumps capable of working satisfactorily at such high pressures, even under
continuous operation
machine tools (e.g., displace of cutting emulsion, supply for hydraulic equipment
like cylinders)
high pressure units (HPU) (e.g., for overload protection of presses)
test rigs
automotive sector (e.g., automatic transmission, hydraulic suspension control in
upper-class cars)
plastic- and powder injection molding
wind energy
Oil industry
22. Reciprocating Positive
Displacement Pumps
2.Diaphragm Pump
A diaphragm pump (also
known as a Membrane pump, Air
Operated Double Diaphragm
Pump (AODD) or Pneumatic
Diaphragm Pump) is a positive
displacement pump that uses a
combination of the reciprocating
action of a rubber, thermoplastic
or Teflon diaphragm and suitable
valves on either side of the
diaphragm (check valve, butterfly
valves, flap valves, or any other
form of shut-off valves) to pump a
fluid.
23. Reciprocating Positive
Displacement Pumps
2.Diaphragm Pump
WORKING
Suction stroke
To fill the pump cavity, positive
suction head (inlet pressure) is required.
When inlet valve A is lifted by the
pressure of the suction head, the slurry
completely fills the pump cavity. The
diaphragm returns to its normal convex
position and the air exhausts. Discharge
valve B, seated by line pressure, prevents
slurry from returning to the pump cavity.
24. Reciprocating Positive
Displacement Pumps
2.Diaphragm Pump
WORKING
Discharge stroke
Compressed air is admitted to
the chamber above the diaphragm.
The diaphragm descends, gradually
increasing the pressure in the pump
cavity. This in turn closes inlet valve
A and causes discharge valve B to
open when the line pressure is
exceeded. Further movement of the
diaphragm displaces the slurry from
the pump cavity.
25. Reciprocating Positive
Displacement Pumps
2.Diaphragm Pump
ADVANTAGES
have good suction lift characteristics. They can handle sludge and slurries with a
relatively high amount of grit and solid content.
Used for low pressure application like removing water from trenches
have good dry running characteristics.
can be used to make artificial hearts.
are used to make air pumps for the filters on small fish tanks.
can be up to 97% efficient.
have good self priming capabilities.
can handle highly viscous liquids.
Can handle tough corrosives, abrasives, temperatures to 200°F and slurries
containing up to 75% solids.
26. Reciprocating Positive
Displacement Pumps
2.Diaphragm Pump
DISADVANTAGES
Most air diaphragm pumps require around 20 standard cubic-feet perminute
and 100 psi of air intake to operate efficiently.
Also, these types of pumps tend not to pump very accurately at their bottom
end. A functioning air diaphragm pump pulsates, and a dampener must be
fitted onto the pump to reduce pulsing.
27. Reciprocating Positive
Displacement Pumps
2.Diaphragm Pump
COMPATIBILITY
Delicate crystal slurries
Highly concentrated and unusually viscous slurries
Highly abrasive slurries
Highly corrosive slurries
Very large solids in slurries
Extremely volatile slurries
Delicate and unstable slurries
Air-entrained slurries
Shear-sensitive slurries
28. Reciprocating Positive
Displacement Pumps
2.Diaphragm Pump
APPLICATIONS
For drum and small tank transfer, pickling solutions, chemical feed.
Filter press, tank cleaning systems, pigments and resins.
Paints, latex, ceramic slip, slurries, polymers, tank car fill and empty, foods.
Handling optical lens grinding rouges, waste glass slurries and cutting slurries.
Ship cleaning, dewatering holds, bilges, coffer dams, fire-fighting, sewage from
holding tanks, offshore drilling, sand blast slurries.
Mill scale, pickling tank chemicals, foundry sand slurries, palm oils, cutting oils.
Dewatering mines and construction sites, caissons, tunnels.
Transfer of frits, enamels, solvents, latex, pigments, additives, inhibitors, resins,
dryers.
Decanting and emptying of acid and alkaline bath solutions, pumping of heavy
contaminated sewage and slurries.
29. Reciprocating Positive
Displacement Pumps
3.Plunger pump
A plunger pump is a type of
positive displacement pump where the
high-pressure seal is stationary and a
smooth cylindrical plunger slides through
the seal. This makes them different from
piston pumps and allows them to be used
at higher pressures. This type of pump is
often used to transfer municipal and
industrial sewage.
30. Reciprocating Positive
Displacement Pumps
3.Plunger pump
ADVANTAGES
Plunger pumps are used in applications that could range from
70 to 2,070 bar (1,000 to 30,000 psi)
Pressure and flow rate changes have little effect on
performance.
Pressure can be controlled without affecting flow rate.
Wide pressure range - can achieve very high pressures
Have high efficiency
Capable of developing very high pressures.
Low and easy maintenance
31. Reciprocating Positive
Displacement Pumps
3.Plunger pump
DISADVANTAGES
Pulsating flow
Typically only handles lower flow
rates
Typically heavy and bulky
High operating and maintenance
costs.
not be compatible for use with highly
acidic fluids
APPLICATIONS
Raw and Digested sewage sludge
Industrial and chemical waste and
slurries
Lime putty and slurries
Pulp and paper stock
Settled oil solids
32. Rotary Positive Displacement
Pumps
The working of all the rotary type positive displacement
pumps are based on the same principle, i.e pumping of the liquid
with the help of rotating elements. The rotating elements can be
gears, screws, vanes or cam, etc.
The different types are
1. Gear pump
2. Lobe pump
3. Screw pump
4. Cam pump
5. Vane pump
6. Peristaltic pump
33. Rotary Positive Displacement
Pumps
1.Gear pump
A gear pump uses the meshing and De-meshing of gears
to pump fluid by displacement. They are one of the most common
types of pump for hydraulic fluid power applications. There are
two types of gear pumps, they are
1. External gear pump
2. Internal gear pump
34. Rotary Positive Displacement
Pumps
1.1 External Gear pump
External gear
uses two identical
rotating against each
pump
gears
other.
one gear is driven by a motor
and it in turn drives the other
gear. Each gear is supported
by a shaft with bearings on
both sides of the gear.
35. Rotary Positive Displacement
Pumps
1.1 External Gear pump
As the gears come out of mesh, they create expanding
volume on the inlet side of the pump. Liquid flows into
the cavity and is trapped by the gear teeth as they rotate.
Liquid travels around the interior of the casing in the
pockets between the teeth and the casing -- it does not
pass between the gears.
Finally, the meshing of the gears forces liquid through the
outlet port under pressure.
36. Rotary Positive Displacement
Pumps
1.1External Gear pump
ADVANTAGES
High speed
High pressure
No overhung bearing loads
Relatively quiet operation
Design accommodates wide variety of material
Low weight
Relatively high working pressures
Wide range of speeds
Wide temperature and viscosity range (i.e. flexibility)
Low cost
DISADVANTAGES
Four bushings in liquid area
No solids allowed
Fixed End Clearances
37. Rotary Positive Displacement
Pumps
1.1 External Gear pump
APPLICATIONS
Various fuel oils and lube oils
Chemical additive and polymer metering
Chemical mixing and blending (double pump)
Industrial and mobile hydraulic applications (log splitters, lifts,
etc.)
Acids and caustic (stainless steel or composite construction)
Low volume transfer or application
Lubrication pumps in machine tools
Fluid power transfer units and oil pumps in engines
38. Rotary Positive Displacement
Pumps
1.2 Internal gear pump
Internal gear pumps are
primarily used in non-mobile
hydraulics (e.g. machines for
plastics and machine tools,
presses, etc.) and in vehicles
that operate in an enclosed
space (electric fork-lifts, etc.).
The internal gear pump is
exceptionally versatile and also
capable of handling thick
fluids.
39. Rotary Positive Displacement
Pumps
1.2 Internal gear pump
Liquid enters the suction port between the rotor (large exterior gear)
and idler (small interior gear) teeth. The arrows indicate the direction
of the pump and liquid.
Liquid travels through the pump between the teeth of the "gear-
within-a-gear" principle. The crescent shape divides the liquid and
acts as a seal between the suction and discharge ports.
The pump head is now nearly flooded, just prior to forcing the liquid
out of the discharge port. Intermeshing gears of the idler and rotor
form locked pockets for the liquid which assures volume control.
Rotor and idler teeth mesh completely to form a seal equidistant
from the discharge and suction ports. This seal forces the liquid out
of the discharge port
40. Rotary Positive Displacement
Pumps
1.2 Internal gear pump
ADVANTAGES
This pump can transport liquids of any viscosity
Can work at even high and low temperatures.
Only two moving parts
Can create strong vacuum
Can be used as self vacuum pump for air and gases
Non-pulsating discharge
Excellent for high-viscosity liquids
Good suction and NPSH
Constant and even discharge regardless of pressure
conditions
Operates well in either direction
Single adjustable end clearance
Easy to maintain
Flexible design offers application customization
DISADVANTAGES
Usually requires moderate speeds
Medium pressure limitations
One bearing runs in the product
pumped
Overhung load on shaft bearing
41. Rotary Positive Displacement
Pumps
1.2 Internal gear pump
APPLICATIONS
All varieties of fuel oil, Cooking oil and lube oil
Resins and Polymers
Alcohols and solvents
Asphalt, Bitumen, and Tar
Polyurethane foam (Isocyanate and polyol)
Food products such as corn syrup, chocolate, and peanut butter
Paint, inks, and pigments
Soaps and surfactants
Glycol
Plastics, oil soap liquid, phenol resin, formalin, polycarbonate resin, acrylics, liquid
calcium, inks, latex compounds, high viscosity adhesives, cleansers, hot melt, epoxy
resin.
LPG, benzene, gasoline, alcohol, liquid Freon, heavy oils, coal tar, pitches, greases,
asphalt, Bitumen acid pitch.
42. Rotary Positive Displacement
Pumps
2.Screw pump
A screw pump is a positive-
displacement pump that use one or
several screws to move fluids or solids
along the screw(s) axis. In its simplest
form the (Archimedes' screw pump), a
single screw rotates in a cylindrical
cavity, thereby moving the material
along the screw's spindle. This ancient
construction is still used in many low-
tech applications, such as irrigation
systems and in agricultural machinery
for transporting grain and other solids.
43. Rotary Positive Displacement
Pumps
2.Screw pump
ADVANTAGES
Slow Speed, Simple and Rugged design
Pumps raw water with heavy solids and floating debris
No collection sump required = minimum head
'Gentle handling' of biological flock
Long lifetime ( > 20-40 years)
Pump capacity is self-regulating with incoming level
Easy maintenance (no 'high skilled' staff required)
Constant high efficiency with variable capacity
Can run without water
Screw pumps allow a wide range of flows and pressures
They can also accommodate a wide range of liquids and viscosities
Screw pumps have high speed capability and this allows the freedom of driver selection
All the screw pumps are Self-priming which allows them to have good suction characteristics
44. Rotary Positive Displacement
Pumps
2.Screw pump
DISADVANTAGES
Cost of manufacturing is high because of close tolerancesand
running clearances
Any changes in the viscosity of the fluid results in high fluctuations inthe
performance.
A screw pump with high pressure capability will require highpumping
elements which increases the overall size of the pump.
46. Rotary Positive Displacement
Pumps
3.Lobe pump
Lobe pumps are similar
to external
operation in
gear pumps in
that fluid flows
interior of thearound the
casing. Unlike external gear
pumps, however, the lobes do
not make contact. Lobe contact
is prevented by external timing
gears located in the gearbox.
47. Rotary Positive Displacement
Pumps
3.Lobe pump
ADVANTAGES
Pass medium solids
No metal-to-metal contact
Long term dry run (with
lubrication to seals)
Non-pulsating discharge
DISADVANTAGES
Requires timing gears
Requires two seals
Reduced lift with thin
liquids
48. Rotary Positive Displacement
Pumps
3.Lobe pump
APPLICATIONS
Polymers
Paper coatings
Soaps and surfactants
Paints and dyes
Rubber and adhesives
Pharmaceuticals
Food applications
49. Rotary Positive Displacement
Pumps
4.Cam pump
The main part of the pump is a cam which is mounted on
a rotating shaft that rotates in a cylindrical casing. The cam is
designed in such a way that it always maintains contact with the
walls of the casing as it rotates. A spring loaded blade acts as the
cam follower and moves in an accurately machined slot in the
casing. This blade separates suction and delivery sides of the
pump. Inlet and outlet ports are placed on either sides of this
blade. The discharge from the pump is continuous. It also
eliminates the crank and connecting rod mechanisms and delivers
a smooth operation.
50. Rotary Positive Displacement
Pumps
4.Cam pump
(a) The water is sucked in during the counter clockwise rotationof the cam.
(b) The apex of the cam is at top, displacing the follower blade tomaximum.
At current position, the whole cavity is filled completely by water. Now
suction process is complete.
(c) further advancement of the cam pushes the water out via the outlet port,
which is connected to the deliverypipe.
(a) (b) (c)
51. Rotary Positive Displacement
Pumps
4.Cam pump
ADVANTAGES
The pump operates smoothly.
It has less noise and vibration.
The delivery is at a constant rate.
The suction and discharge happens simultaneously.
The absence of unidirectional valves and other linkages like
crank and connecting rods reduce the complexity and floor
space required.
52. Rotary Positive Displacement
Pumps
4.Cam pump
DISADVANTAGES
The discharge was found to be decreasing with increase of
head due to the increase of leakage around the cam with
increase in pressure.
The tolerances are not close enough to seal the leakages.
There is excessive leakage through the rectangular groove
provided for the movement of the follower blade, at high
pressures.
The volumetric efficiency was also found to be decreasing with
increase of head.
53. Rotary Positive Displacement
Pumps
5.Vane pump
A rotary vane pump is a
positive-displacement pump
that consists of vanes mounted
to a rotor that rotates inside of a
cavity. In some cases these
vanes can be variable length
and/or tensioned to maintain
contact with the walls as the
pump rotates.
54. Rotary Positive
Displacement Pumps
5.Vane pump
ADVANTAGES
Handles thin liquids at
relatively higher pressures
Compensates for wear
through vane extension
Sometimes preferred for
solvents, LPG
Can run dry for short periods
Can have one seal or stuffing
box
Develops good vacuum
DISADVANTAGES
Can have two stuffing boxes
Complex housing and many
parts
Not suitable for high
pressures
Not suitable for high viscosity
Not good with abrasives
55. Rotary Positive Displacement
Pumps
5.Vane pump
APPLICATIONS
Aerosol and Propellants
Aviation Service - Fuel Transfer, Deicing
Auto Industry - Fuels, Lubes, Refrigeration Coolants
Bulk Transfer of LPG and NH3
LPG Cylinder Filling
Alcohols
Refrigeration – Freons,Ammonia
Solvents
Aqueous solutions
56. Rotary Positive Displacement
Pumps
6.Peristaltic pump
A peristaltic pump is a type
of positive displacement pump used
for pumping a variety of fluids. The
fluid is contained within a flexible
tube fitted inside a circular pump
casing. A rotor with a number of
"rollers", "shoes", "wipers", or "lobes"
attached to the external circumference
of the rotor compresses the flexible
tube. As the rotor turns, the part of the
tube under compression is pinched
closed (or "occludes") thus forcing the
fluid to be pumped to move through
the tube.
57. Rotary Positive Displacement
Pumps
6.Peristaltic pump
ADVANTAGES
No contamination. Because the only part of the pump in
contact with the fluid being pumped is the interior of the tube,
it is easy to sterilize and clean the inside surfaces of the pump.
Low maintenance needs. Their lack of valves, seals and glands
makes them comparatively inexpensive to maintain.
They are able to handle slurries, viscous, shear-sensitive and
aggressive fluids.
Pump design prevents backflow and syphoning without valves
58. Rotary Positive Displacement
Pumps
6.Peristaltic pump
DISADVANTAGES
The flexible tubing will tend to degrade with time and require
periodic replacement.
The flow is pulsed, particularly at low rotational speeds.
Therefore, these pumps are less suitable where a smooth
consistent flow is required.
59. Rotary Positive Displacement
Pumps
6.Peristaltic pump
APPLICATIONS
Medicine
Dialysis machines
Open-heart bypass pump machines
Medical infusion pumps
Testing and research
AutoAnalyzer
Analytical chemistry experiments
Carbon monoxide monitors
Media dispensers
Agriculture
'Sapsucker' pumps to extract maple tree sap
60. Rotary Positive Displacement
Pumps
6.Peristaltic pump
APPLICATIONS
Food manufacturing and sales
Liquid food fountains
Beverage dispensing
Food-service Washing Machine fluid pump
Chemical handling
Printing, paint and pigments
Pharmaceutical production
Dosing systems for dishwasher and laundry chemicals
61. Rotary Positive Displacement
Pumps
6.Peristaltic pump
APPLICATIONS
Engineering and manufacturing
Concrete pump
Pulp and paper plants
Minimum quantity lubrication
Water and Waste
Chemical treatment in water purification plant
Sewage sludge
Aquariums, particularly calcium reactors