This document provides an overview of hydraulic cylinders, including their types, construction, operation, ratings, formulas for application, features, and installation/troubleshooting. It describes the main types of cylinders like ram, single acting, telescopic, spring return, and double acting cylinders. It also discusses cylinder construction, actuation, mounting, ratings based on size and pressure, formulas to calculate speed, flow, force and pressure. Key features like seals, cushions, ports and limit switches are explained. Guidelines for cylinder selection, installation and troubleshooting are provided.
A pneumatic control valve actuator converts energy (typically in the form of compressed air) into mechanical motion. The motion can be rotary or linear, depending on the type of actuator.
Introduction to Pneumatic Systems:
Basic Requirements for Pneumatic System,Applications, Pneumatic fundamentals, Construction, working principle and operation of pneumatic power transmission system components like Power source, FRL unit, Actuators and control valves like DCV, FCV, PCV, time delay, quick exhaust, twin pressure, shuttle
Pneumatic Drives-Hydraulic Drives-Mechanical Drives-Electrical Drives-D.C. Servo Motors, Stepper Motors, A.C. Servo Motors-Salient Features, Applications and Comparison of all these Drives, End Effectors-Grippers-Mechanical Grippers, Pneumatic and Hydraulic- Grippers, Magnetic Grippers, Vacuum Grippers; Two Fingered and Three Fingered Grippers; Internal Grippers and External Grippers; Selection and Design Considerations.
A pneumatic control valve actuator converts energy (typically in the form of compressed air) into mechanical motion. The motion can be rotary or linear, depending on the type of actuator.
Introduction to Pneumatic Systems:
Basic Requirements for Pneumatic System,Applications, Pneumatic fundamentals, Construction, working principle and operation of pneumatic power transmission system components like Power source, FRL unit, Actuators and control valves like DCV, FCV, PCV, time delay, quick exhaust, twin pressure, shuttle
Pneumatic Drives-Hydraulic Drives-Mechanical Drives-Electrical Drives-D.C. Servo Motors, Stepper Motors, A.C. Servo Motors-Salient Features, Applications and Comparison of all these Drives, End Effectors-Grippers-Mechanical Grippers, Pneumatic and Hydraulic- Grippers, Magnetic Grippers, Vacuum Grippers; Two Fingered and Three Fingered Grippers; Internal Grippers and External Grippers; Selection and Design Considerations.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
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Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
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Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
1. Overview
Types of Cylinders
Construction and Operation
Cylinder Ratings
Formulas for Application
Cylinder Features
Installation and Trouble Shooting
2. 1. Hydraulic pump unit : in an actual hydraulic system a pump converts
mechanical power into fluid power.
2. Control valve : the flow of pressurized liquid discharge by the pump is
controlled by valves.
Pressure control valves- control the liquid pressure .
Flow control valves : control the liquid flow rate.
Directional control valve : control the direction of flow of the liquid.
3. Hydraulic motor/cylinder
The liquid discharged by the pump is directed to hydraulic motors or cylinders
by control valves.
Motors are used where rotory motion is desired and cylinders are used where
linear motion is necessary.
3. Hydraulic system
Hydraulic systems are used to control & transmit power.
•A pump driven by prime mover (electric motor) creates flow of fluid
5. Function of components
1. The hydraulic actuator is a device used to convert the fluid power
into mechanical power to do useful work. The actuator may be of the
linear type (e.g., hydraulic cylinder) or rotary type(e.g., hydraulic motor) to
provide linear or rotary motion, respectively.
2. The hydraulic pump is used to force the fluid from the reservoir to
rest of the hydraulic circuit by converting mechanical energy into hydraulic
energy.
3. Valves are used to control the direction, pressure and flow rate of a
fluid flowing through the circuit.
4. External power supply (motor) is required to drive the pump.
5. Reservoir is used to hold the hydraulic liquid, usually hydraulic oil.
6. Con.
6. Piping system carries the hydraulic oil from one place to
another.
7. Filters are used to remove any foreign particles so as keep the
fluid system clean and efficient, as well as avoid damage to the
actuator and valves.
8. Pressure regulator regulates (i.e., maintains) the required
level of pressure in the hydraulic fluid.
7. Pneumatics
Uses pressurized air to transmit and control power. Air is used as
the fluid because:-
It is safe.
It is less expensive and readily available
It can be inducted and exhausted directly to the atmosphere and
return line is not necessary as with hydraulics.
11. Actuators
What is an actuator?
Actuators are devices used to produce action or motion.
Input(mainly electrical signal , air, fluids)
Electrical signal can be low power or high power.
Actuators output can be position or rate i.e. linear
displacement or velocity.
Actuation can be from few microns to few meters
14. Hydraulic actuator.
The hydraulic actuator is a device used to convert the
fluid power into mechanical power to do useful work. The
actuator may be of the linear type (e.g., hydraulic cylinder)
or rotary type(e.g., hydraulic motor) to provide linear or
rotary motion, respectively
15. Linear actuator (hydraulic cylinder)-
Provides motion in straight line.
Linear displacement depends on stroke length.
Usually referred to as cylinders, rams (single
acting cylinders) or jacks.
Rotary actuators (Hydraulic motors)-
Produces continuous rotational motion.
Pump shaft is rotated to generate flow.
A motor shaft is caused to rotate by fluid being
forced into the driving chambers.
Semi Rotary actuators
Produces non-continuous rotational motion
Limited to less than one revolution (<360)
Used to produce oscillatory motions in
16. Types of Cylinders
Ram
Single Acting
Telescopic
Spring Return
Double Acting
17. Ram Cylinders
The simplest single acting cylinder
One fluid chamber
Exerts force in only one direction
Mounted mostly vertically
The cylinder retracts by the force
of the load due to gravity
18. Ram Cylinders
Ram cylinders are most
commonly used in
elevators, jacks, and
automobile hoists.
Can also be used on a
scissors lift like the one on
the loading dock of KL.
19. Single Acting Cylinders
Acts much like a ram cylinder
Main difference is that the single acting
cylinder uses a piston. The leakage flow that
goes past the piston is ported the tank.
20. Telescopic Cylinders
Mostly a single acting cylinder
Series of rod segments called sleeves, most
common to only have 4 or 5 sleeves in each
cylinder
The sleeves work together to provide a longer
stroke
The maximum force is at the collapsed position
The speed will increase at each stage, but will not
allow as much force.
22. Spring Return Cylinders
Considered a single acting cylinder
Pressure applied to the cap end pushes the spring down as
the rod is extending
When the pressure is removed the spring force allows the
cylinder to retract
The drain is in the spring chamber and allows the leakage
flow past the piston seal
23. Double Acting Cylinders
Types
Basic double acting (differential
cylinder)
Double rod cylinder (nondifferential
cylinder)
Tandem cylinder
24. Double Acting Cylinders
Most common type of cylinder
Pressure is applied to both rod end and
cap end
The majority of the cylinders are basic.
This means that there is unequal areas at
either end.
25. Double Acting Cylinders
Rod extension is slower because has a larger
area, but allows a greater force because of
the bigger area.
Retract is faster because of the smaller area,
but the force allowed is smaller because of
the smaller area.
27. Double Acting Cylinders
Double Rod Cylinder
Nondifferential type cylinder
Same areas at both ends of the cylinder if the rods are the
same size
Provides equal force, and equal speed in both directions
28. Double Acting Cylinders
Tandem Cylinder
Two pistons in line with a common rod
This allows you to have a greater forces without increasing
the size of the cylinder bore
Tandem cylinders are used in places where there is
insufficient space to increase the size of the cylinder bore.
30. Cylinder Actuation
Fluid routed to and from cylinder through
ports in each of the heads
Cylinder retracts from pressure to rod end
port and the other port connected to tank
Cylinder extends from pressure to cap end
port and rod end port connected to tank
31. Cylinder Mounting
Main function to anchor the cylinder
Mounting methods include tie rod, bolt
mount, flange, trunnion, side lug and side
tapped, and clevis
Tie rod is most common
34. Cylinder Ratings
Ratings include size specifications and pressure
capability
Size specifications
- piston diameter (bore)
- rod diameter
- stroke length
Pressure capability
- pressure rating established by manufacturer
- rating limits maximum force capability
35. Formulas For Applications
V (in/min) = GPM x (231 / Area (in²))
Q (flow) = Area (in²) x V (in/min) / 231
F (lbs) = Pressure (psi) x Area (in²)
P (psi) = Force (lbs) / Area (in²)
38. Cylinder Features
Basic size and pressure ratings are not the only things that define a
cylinder
Features such as:
- seals
- cushions
- stop tubes
- rod spacers
- ports
- bleed ports
-limit switches
39. Seals
Cast iron is most common piston seal
Long service life is most important characteristic
Rubber-like materials are the most common rod seal
Rod wiper or scraper keeps foreign material from entering
the cylinder and the hydraulic system
40. Cylinder Cushions
Used to slow down the piston at the end of its
stroke
Basic elements include the plunger,
adjustable cushion orifice, and a check valve
41. Stop Tubes
Metal collar that fits over piston rod next to piston
Used primarily on long stroke cylinders
Provides better cylinder rod support
Majority of applications do not require a stop tube
42. Tie Rod Spacers
Tie rod spacers and center supports improve rigidity of long
stroke tie rod cylinders
Spacer keeps proper position and prevents excessive deflection
Tie rod center support has side mounting lugs and serves as
additional mounting location
43. Ports
Internal or external opening in a cylinder or a valve
Designed to allow the passing of fluid into or out of
the component
Wide variety of port type configurations
Straight thread O-ring fittings are highly
recommended for leak-free connections
Poor installation of tubing or hose to port causes
leakage
44. Bleed Ports
Usually cylinders bleed air when ports are
vertical on top
Bleed ports are necessary to remove trapped
air when the ports are installed on the bottom
of the cylinder
Desirable on high speed, high performance,
heavy load applications
45. Limit Switches
Signal rod position to a control circuit or a safety circuit to limit end of
travel
Common types
-mechanical = mechanical actuation of electrical switch when switch is
activated by lead angle on a hardened cylinder cushion
- proximity = activated when metal cushion passes close to magnetic
pickup of the switch
* becoming increasingly popular due to simplicity
46. Cylinder Installation and
Troubleshooting
Cylinder application design » hydraulic
engineers
Installation » hydraulic technician
Proper installation and maintenance is crucial
to all components to achieve max efficiency
Recognizing and controlling potential
problems is purpose of troubleshooting
47. Design Problem
A dump truck to lift 5 ton. Specify a cylinder.
Velocity in retract is 15 in/sec
Stroke = 18 in
P = 2000 psi