This document discusses spool actuation methods for directional control valves. It begins by introducing the three main types of valves: directional control valves, pressure control valves, and flow control valves. It focuses on directional control valves, which determine the fluid flow path. There are two main types of spools: sliding and rotary. Spool actuation can be manual, mechanical, solenoid, hydraulic, pilot-operated, electric, fluidic, or indirect. Common actuation methods include manual handles, linkages, solenoids, and applying a pilot pressure signal. Directional control valves provide advantages such as being innovative, versatile, compact, and reliable.
The pressure energy is fed to the actuator through a number of control block called valves.
• Various type of valve are used in hydraulic system to control or regulate the flow medium.
• Basicallyvalvesareexpectedtocontrol: – Direction
– Pressure
– Flow
– Otherspecialfunctions.
Control of a single-acting and double-acting cylinder, regeneration, motor braking, speed control, synchronisation, fail safe, two handed, application of counterbalance, sequence, unloading, pressure reducing, pilot operated check valve
The pressure energy is fed to the actuator through a number of control block called valves.
• Various type of valve are used in hydraulic system to control or regulate the flow medium.
• Basicallyvalvesareexpectedtocontrol: – Direction
– Pressure
– Flow
– Otherspecialfunctions.
Control of a single-acting and double-acting cylinder, regeneration, motor braking, speed control, synchronisation, fail safe, two handed, application of counterbalance, sequence, unloading, pressure reducing, pilot operated check valve
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
Hydraulic Pumps, Motors and Actuators:
Construction, working principle and operation of rotary & reciprocating pumps like Gear, Vane, Generated-Rotor, Screw, Axial Piston, Radial Piston, Pump characteristics, Linear and Rotary Actuators, Hydrostatic Transmission Systems. Selection of components for applications
In hydraulic and pneumatic systems flow control valves are necessary to vary the speed of actuator. Flow control valves are placed in between Actuator and Direction Control (DC) Valve
HYDRAULIC POWER GENERATING AND UTILIZING SYSTEMS
Introduction to fluid power system - Hydraulic fluids - functions, types, properties, selection and application.
POWER GENERATING ELEMENTS: Pumps, classification, working of different pumps such as Gear, Vane, Piston (axial and radial), pump performance or characteristics, pump selection factors- simple Problems.
POWER UTILIZING ELEMENTS: Fluid Power Actuators: Linear hydraulic actuators – Types and construction of hydraulic cylinders – Single acting, Double acting, special cylinders like tandem, Rodless, Telescopic, Cushioning mechanism.
Hydraulic Motors, types – Gear, Vane, Piston (axial and radial) – performance of motors.
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
Hydraulic Pumps, Motors and Actuators:
Construction, working principle and operation of rotary & reciprocating pumps like Gear, Vane, Generated-Rotor, Screw, Axial Piston, Radial Piston, Pump characteristics, Linear and Rotary Actuators, Hydrostatic Transmission Systems. Selection of components for applications
In hydraulic and pneumatic systems flow control valves are necessary to vary the speed of actuator. Flow control valves are placed in between Actuator and Direction Control (DC) Valve
HYDRAULIC POWER GENERATING AND UTILIZING SYSTEMS
Introduction to fluid power system - Hydraulic fluids - functions, types, properties, selection and application.
POWER GENERATING ELEMENTS: Pumps, classification, working of different pumps such as Gear, Vane, Piston (axial and radial), pump performance or characteristics, pump selection factors- simple Problems.
POWER UTILIZING ELEMENTS: Fluid Power Actuators: Linear hydraulic actuators – Types and construction of hydraulic cylinders – Single acting, Double acting, special cylinders like tandem, Rodless, Telescopic, Cushioning mechanism.
Hydraulic Motors, types – Gear, Vane, Piston (axial and radial) – performance of motors.
Electro hydraulic system Components and their operationSrichandan Subudhi
After this presentation you will be knowing:
1.What are DCVs, its type and their uses
2.About Check Valves and pilot controlled check valves
3.What are solenoid actuated valves and their operation
4.What are proportional solenoid valves and their operation
5.Servo Valve Operation
6.Servo Valve Connector
A control valve is a power-operated device used to regulate or manipulate the flow of fluids, such as gas, oil, water, and steam. It is a critical part of a control loop and is an example of a final control element.
Hydraulic Valves and Hydraulic System AccessoriesRAHUL THAKER
Hydraulic Valves and Hydraulic System Accessories:
Direction control valves,Pressure control valves, Flow control valves, Non-return valves, Reservoirs,Accumulators, Heating & cooling devices, Hoses. Selection of valves for circuits.
In this session you will learn:
Instruments
Transmitters
Control valves
Valve actuators
Valve positioner
For more information, visit: https://www.mindsmapped.com/courses/industrial-automation/complete-training-on-industrial-automation-for-beginners/
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
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.
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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.
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.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
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.
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.
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
2. PREFACE
Introduction
Type’s of valves
Directional control valve
Necessity of DCV
Types of Spool
Types of Spool Actuating Methods
Advantages of valves
3. INTRODUCTION
One of the most important considerations in any fluid power system is
control. If control components are not properly selected, the entire
system does not function as required. In fluid power, controlling
elements are called valves.
4. Types of Valves
There are three types of valves:
I. Directional control valves (DCVs): They determine the path through which a
fluid transverses a given circuit.
II. Pressure control valves: They protect the system against overpressure, which
may occur due to a sudden surge as valves open or close or due to an increase
in fluid demand.
III. Flow control valves: Shock absorbers are hydraulic devices designed to
smooth out pressure surges and to dampen hydraulic shock
5. Directional control valve
A valve is a device that receives an external signal (mechanical, fluid pilot
signal, electrical or electronics) to release, stop or redirect the fluid that
flows through it. The function of a DCV is to control the direction of fluid flow
in any hydraulic system. A DCV does this by changing the position of internal
movable parts .
Directional control valves are one of the most fundamental parts in hydraulic
machinery as well as pneumatic machinery. They allow fluid flow into
different paths from one or more sources. They usually consist of a spool
inside a cylinder which is mechanically or electrically controlled. The
movement of the spool restricts or permits the flow, thus it controls the fluid
flow.
6. Necessity of DCV
To start, stop, accelerate, decelerate and change the direction of motion of a
hydraulic actuator.
To permit the free flow from the pump to the reservoir at low pressure when
the pump’s delivery is not needed into the system.
To vent the relief valve by either electrical or mechanical control.
To isolate certain branch of a circuit .
10. Sliding spool
Sliding spool is cylindrical in cross section, and the lands and grooves are also
cylindrical . This consists of a specially shaped spool and a means of
positioning the spool. The spool is fitted with precision into the body bore
through the longitudinal axis of the valve body. The lands of the spool divide
this bore into a series of separate chambers. The ports of the valve body lead
into these chambers and the position of the spool determines the nature of
inter-connection between the ports.
11. Rotary spool
Rotary valves have sphere-like lands and grooves in the form of holes drilled
through them . In this type, the spool is rotated to change the direction of
fluid. It has longitudinal grooves. The rotary spools are usually manually
operated.
12. Types of Spool Actuating Methods
Manual
Mechanical
Solenoid
Hydraulic
Pilot
Electric
Fluidic
INDIRECT
13. A. Manually operated
In manually operated DCVs, the spool is shifted manually by moving a handle
pushing a button or stepping on a foot pedal. When the handle is not
operated, the spool returns to its original position by means of a spring
B.Mechanically Operated
The spool is shifted by mechanical linkages such as cam and rollers .
C. Solenoid operated
When an electric coil or a solenoid is energized, it creates a magnetic force
that pulls the armature into the coil. This causes the armature to push the
spool of the valve .
D. Pilot operated
A DCV can also be shifted by applying a pilot signal (either hydraulic or
pneumatic) against a piston at either end of the valve spool. When pilot
pressure is introduced, it pushes the piston to shift the spool.
14.
15.
16. Advantages
Innovative
Small and compact for a wide range of pneumatic applications .
Low weight
Minimal actuating forces .
Versatile
Round silencer for ducted exhaust air
Suitable for vacuum in some cases
Reverse operation possible in some cases
Actuation: direct and piloted
Reliable
17.
18.
19. Q.1 What is the function of DCV?
A DCV is the extend & retract control for your hydraulic cylinder.It provides a
flow path from the pump to the cylinder and a return path from the cylinder to
the fliud reserviour .
Q.2 Why are Control valves sometimes very noisy?
Noise is generated whenever there is a unbalanced system . In valves,
noise is generated because of vibration produced due to very high
velocity turbulent flow and even also on high pressure drop.
To overcome this, speacial low noise valves are designed to drop pressure
gradually so that velocities are controlled at low levels.
20. Q.3 Is flow through the control valve –
laminar or turbulent?
Flow throught the control valve is almost always turbulent.