Control Engineering for mechanical _lec2.pptx

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1. Introduction to Hydraulics & Pneumatics Dr. Biplov Kumar Roy Assistant Professor (Mechanical Engineering) Dhaka University of Engineering & Technology DEGREE PROGRAM: B.Sc. in Mechanical Engineering COURSE CODE: ME 4401 COURSE TITLE: Control Engineering

2. Structure of a hydrostatic drive Aggregate Control elements Actuator Valves, determining the path, pressure, flow rate of the working fluid Elements doing work Linear Rotational Swinging Pump, motor Fluid reservoir Pressure relief valve Filter Piping

3. 2005/2006 I. Hydraulic and Pneumatic Systems 3 A typical h ydraulic s ystem 1 – pump 2 – oil tank 3 – flow control valve 4 – pressure relief valve 5 – hydraulic cylinder 6 – directional control valve 7 – throttle valve

4. Hydraulic power control

5. ISO symbols in Hydraulic & Pneumatics System

6. Pressure Control valve symbols Pilot-Operated Relief Valve Pressure-Reducing Valve Unloading Valve Sequence Valve Counterbalance valves

7. Direction Control valve Symbol Check valves Shuttle valves 3/2 way valve : 3ports and 2 position DCV 5/2 Solenoid Operated D.C.V. 4/2 Solenoid Operated D.C.V. 4/3 Closed centre D.C.V 4/3TandemCentre 4/3 Floating Neutral 4/3 Open Center 4/3 Regenerative Center

8. Flow Control valve Symbol Variable Flow Control Valve Pressure compensated F.C.V. Press. & temp. Compensated F.C.V. Flow control Valve with integral Check Valve

9. Auxiliary Devices in FPS Accumulators Dead Weight Type Spring Loaded Type Gas Charged With separator Gas Charged Without Separator Press. Guage Flow meter Prime Mover Electric Motor Cooler Heater Telescopic Cylinders

10. Pressure Relief Valve