Basics of hydraulic control

Tasks of a hydraulic installation
  • Stationary hydraulics
  • Mobile hydraulics
  • Comparison of hydraulics with other control media
  • Fundamental physical principles of hydraulics
    • Pressure
    • Pressure transmission
    • Power transmission
    • Displacement transmission
    • Pressure transfer
    • Flow rate
    • Continuity equation
  • Components of a hydraulic system
    • Power supply section
    • Hydraulic fluid
    • Valves
    • Cylinders (linear actuators)
    • Motors (rotary actuators)
  • Graphic and circuit symbols
    • Pumps and motors
    • Directional control valves
    • Methods of actuation
    • Pressure valves
    • Flow control valves
    • Non-return valves
    • Cylinders
    • Transfer of energy and conditioning of the pressure medium
    • Measuring devices
    • Combination of devices
  • Design and representation of a hydraulic system
    • Signal control section
    • Hydraulic power section
    • Positional sketch
    • Circuit diagram
    • Components plus technical data
    • Function diagram
  • Components of the power supply section
    • Drive
    • Pump
    • Coupling
    • Reservoir
    • Filters
    • Coolers
    • Heaters
  • Pressure valves
    • Pressure relief valves
    • Pressure regulators
  • Directional control valves
    • way valve
    • way valve
    • way valve
    • way valve
  • Non-return valves
    • Non-return valve
    • Piloted non-return valve
    • Piloted double non-return valve
  • Flow control valves
    • Throttle valves
    • One-way flow control valve
    • Two-way flow control valve
  • Hydraulic cylinders
    • Single-acting cylinder
    • Double-acting cylinder
    • End position cushioning
  • Hydraulic motors
  • Accessories
    • Flexible hoses
    • Pipelines
    • Pressure gauges
    • Pressure sensors
    • Flow measuring instruments
  • 14 Accumulators
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    Days

    Course contents

    1

    Tasks of a hydraulic installation
     Fundamental physical principles of hydraulics
     Components of a hydraulic system

    2

      Components of the power supply section
    Pressure valves
    Pressure relief valves
    Exercise 1: Automatic lathe (Pump characteristic)
    Exercise 2: Package lifting device (Pressure relief valve characteristic)

    3

      Flow control valves
    Throttle valve
    Non-return valves
    Exercise 3: Drawing press (Hydraulic resistances)
    Hydraulic cylinders : Single-acting cylinder  , Double-acting cylinder
    Exercise 4: Calender feeding device - Application of a non-return valve.
    Use of a 2/2-way valve to control a single-acting cylinder.

    4

      Directional control valves
    2/2-way valve  , 3/2-way valve  , 4/2-way valve  , 4/3-way valve
    Exercise 5: Hardening furnace Single-acting cylinder
    Application of a 3/2-way valve. Determination of times
    Exercise 6: Furnace door control (Double-acting cylinder  ) Application of a 4/2-way valve. Determination of times
    Piloted non-return valve
    Exercise 7: Conveyor tensioning device (4/3-way valve with bypass to pump)

    5

      Accumulator
      Exercise 8: Cold-store door (Accumulator)
    Two-way flow control valve
    Exercise 9: Rotary machining station (Flow control valve and counter-holding)

    6

       Flow control valves
    Two-way flow control valve
     Exercise 10: Painting booth (Flow control valve characteristic)
      One – way flow control valve
    Exercise 11: Embossing machine (Application of a one-way flow control valve. Difference between flow control valve and throttle valve on the basis of a Concrete application.)

    7

    Exercise 12: Surface grinding machine (Differential circuit) Design and mode of operation of a differential circuit. Influence of piston areas on pressures
    Exercise 13: Drilling machine - Pressure regulator Design of a control circuit with reduced output pressure. Explanation of mode of operation of a 3-way pressure regulator.
    Exercise 14: Bulkhead door -Hydraulic clamping with a double-acting cylinder.
    Comparison of circuits with and without counter-holding.

    8

    Exercise 15: Ferry loading ramp Flow control valve in inlet and outlet lines
    Speed control circuit with tractive load. Comparison of circuits with flow control valves in the inlet line and outlet line respectively.
    Exercise 16: Bonding press Comparison of pressure regulator and –
    pressure relief valve
    Specification of pressure for a double-acting cylinder.
    Choice of either a pressure relief valve or a pressure regulator
    Exercise 17: Assembly device - Pressure sequence circuit, displacement-step

    9

    Exercise 18: Assembly device Calculation of forces associated with a double-acting cylinder Calculation of advance-stroke time of a cylinder piston.
    Calculation of pressure and time
    Final Exam



     
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