Fluid Power Generating/Utilizing Elements:
Hydraulic pumps and motor gears, vane, piston pumps-motors-selection and specification-drive characteristics-Linear actuatorTypes, mounting details, cushioning-power packs-construction, reservoir capacity, heat dissipation, accumulators-standard circuit symbols, circuit (flow) analysis.
Control and regulation elements:
Direction flow and pressure control valves-method of actuation,types,sizing of ports-pressure and temperature compensation, overlapped and under lapped spool valves-operating characteristics-electro hydraulic systems, electro hydraulic servo valves- different types characteristics and performance
Comparison of Hydraulics and Pneumatics:
Need for Automation, Hydraulic and Pneumatic comparison-ISO symbols for fluid power elements, Hydraulic, pneumaticsSelection criteria and examples related to selection criteria.
Advanced Hydraulics:
Types of proportional control devices-pressure relief, flow control, directional control, Hydraulic symbols, Spool configurations, electrical operation, Basic electrical circuit and operation, solenoid design, comparison between conventional and proportional valves
Method of control :
Comparison between analogue and digital control, Proportional attributes, Ramp, Gain, dead band, Dither, Pulse width modulation, Amplifier cards, Principles of operation, Design and application, Analogue and digital, Closed loop, Internal and external feedback devices, Operation and application of closed loop system, Integrated electronics option frequency Response, Principles of operation, Bode diagrams and their use in manufacturer’s data, PID control, Practical exercises, Commissioning and set up procedures, open loop circuits, closed loop circuits, Interface to the control.
Electrical Control of Fluid power:
Electrical control of Hydraulics and Pneumatics, use of relays, Timers, counters, PLC ladder diagram for various circuits, motion controllers, use of field busses in circuits, Electronic circuits for various open loop control and closed loop (Servo) control of Hydraulics and Pneumatics.
Circuit Design:
Typical industrial hydraulic circuit design methodology- Ladder diagramcascade, method-truth table- karnaugh map method-sequencing circuits- combinational and logic circuits
Application of Propositional and Servo Valves :
Velocity control, Position control and Directional control and applications example: paper industry, process industry, printing sawmill, wood working, extrusion press, power metallurgical press, continuous casting, Food and packaging, Injection moulding, Solar energy and automobile