Lab.1 : Introduction to Hydraulic and Pneumatic Systems
- 1. University of Sana’a Faculty of Engineering Mechatronics Department Lab.1 : Introduction to Hydraulic and Pneumatic Systems Eng. Abdullah AL-Zubair Hydraulic and Pneumatic Systems
- 2. Topics Introduction to Hydraulic and Pneumatic Systems. Introduction to Hydraulics Tutor Parts of Hydraulics Tutor Introduction to Automation Studio 7.0 Professional.
- 3. What is Hydraulics? Hydraulics falls into the category of Hydromechanics.This can be subdivided into Hydrodynamics and Hydrostatics.
- 4. What is Pneumatic? Is the blanket term for the physical science of compressing air, and for branch of mechanical engineering that deals with the use of compressed air or gas.
- 5. Difference between hydraulic and pneumatic.
- 9. Automation Studio 7.0 Professional
- 10. EXPERIMENT 1: FUNCTION TEST ON A PRESSURE RELIEF VALVE Types of pressure control relief valves: Simple Relief Valve (Direct Operating)
- 11. EXPERIMENT 1: FUNCTION TEST ON A PRESSURE RELIEF VALVE Types of pressure control relief valves: Relief Valve (Indirect Operating)
- 12. EXPERIMENT 1: FUNCTION TEST ON A PRESSURE RELIEF VALVE Equipment Required: 1. 1 off Flow control valve 2. 1 off Pressure relief valve 3. 1 off Flow meter 4. 1 off Distribution manifold pressure/tank 5. Connection hoses as required
- 13. EXPERIMENT 1: FUNCTION TEST ON A PRESSURE RELIEF VALVE Operational Procedures Ensure that the hydraulic power pack is switched “off”. Connect the “pressure feed” and “tank return” hoses on the hydraulic power pack to the ‘pressure’ and ‘tank’ manifolds in the tutor case. Following the circuit diagram, connect hoses between the pressure manifold, flow control valve, flow meter and tank manifold as required. Check the assembled circuit with the circuit diagram. Fully close the flow control valve by turning the adjuster clockwise. Start the hydraulic power pack and adjust the pressure relief valve setting to 2.5 bar (36 psi). Open the flow control fully by turning the adjuster anti- clockwise.
- 14. EXPERIMENT 1: FUNCTION TEST ON A PRESSURE RELIEF VALVE Operational Procedures Observe if the flow meter is: Now fully close the flow control valve and observe if the flow meter is: Switch “off” the power pack and remove all hoses. Compare your observations with the circuit explanation.
- 15. EXPERIMENT 1: FUNCTION TEST ON A PRESSURE RELIEF VALVE Circuit Explanation In this experiment the “motor/flow meter” is used to monitor flow within the system, and the “flow control valve” is used as an on/off valve. With the flow control valve fully closed and the pump running it can be observed that the flow meter is ‘not rotating’ indicating there is no fluid passing through the flow control valve. Because the fluid is not passing through the flow control valve the pump will build up pressure at the port ‘P’. Upon reaching a pressure of 2.5 bar (36 psi) the relief valve will open returning the fluid to tank, whilst maintaining the system pressure. When the flow control valve is open the flow meter rotates and the pressure reading falls to approximately 2 bar (29 psi) indicating the fluid is now flowing through this part of circuit, and not through the relief valve.
- 16. EXPERIMENT 1: FUNCTION TEST ON A PRESSURE RELIEF VALVE Questions??? Pressure relief valves are used for what purpose/s? Describe the function of the direct operated pressure relief valve, illustrated below: Where in the hydraulic circuit should the pressure relief valve/s be fitted?