WOLFRAM SYSTEM MODELER
SubCircuitWithReducedPressureExample circuit with a sub-circuit operating at a reduced pressure |
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Diagram
Wolfram Language
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SystemModel["Hydraulic.Examples.MultipleActuators.SubCircuitWithReducedPressure"]
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Information
This example model shows how to move two cylinders and how a pressure-reducing valve can be used to maintain a lower pressure in a sub-circuit.
Fig. 1 shows how the first cylinder is extended and then retracted, and how the second cylinder is retracted, then extended, and finally retracted again. Fig. 2 shows how the pressure-reducing valve limits the pressure at the second cylinder.
Fig. 1 Cylinder positions
Fig. 2 Cylinder pressures. Notice how the cylinder 2 pressure is reduced by the pressure-reducing valve opening pressure. Also notice that the cylinder 2 pressure is larger than the cylinder 1 pressure.
Fig. 1 shows how the first cylinder is extended and then retracted, and how the second cylinder is retracted, then extended, and finally retracted again. Fig. 2 shows how the pressure-reducing valve limits the pressure at the second cylinder.
Fig. 1 Cylinder positions
Fig. 2 Cylinder pressures. Notice how the cylinder 2 pressure is reduced by the pressure-reducing valve opening pressure. Also notice that the cylinder 2 pressure is larger than the cylinder 1 pressure.
Reference
Industrial Hydraulics Manual, 5th ed., Maumee, OH: Eaton Hydraulics Training Services, 2008 p. 287.Parameters (2)
Components (18)
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medium |
Type: Medium Description: Medium in the component |
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tank1 |
Type: Tank Description: Simple tank with constant pressure |
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cylinderDouble1 |
Type: CylinderDouble Description: Double cylinder model |
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cylinderDouble2 |
Type: CylinderDouble Description: Double cylinder model |
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checkValve |
Type: CheckValve Description: Check valve with lumped volumes |
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controlValve1 |
Type: DCVE43TandemCenter Description: Electrically actuated proportional control valve with four ports and three states |
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controlValve2 |
Type: DCVE42 Description: Electrically actuated proportional control valve with four ports and two states |
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pump |
Type: Pump Description: Model of a pump with fixed displacement and volumes |
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pressureReducingValve |
Type: PressureReducingValve Description: Pressure valve, controlled by the pressure difference between the ports |
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pressureReliefValve |
Type: PressureReliefValve Description: Pressure valve, controlled by the pressure difference between the ports |
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tank2 |
Type: Tank Description: Simple tank with constant pressure |
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tank3 |
Type: Tank Description: Simple tank with constant pressure |
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positionSensor1 |
Type: PositionSensor Description: Ideal sensor to measure the absolute position |
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positionSensor2 |
Type: PositionSensor Description: Ideal sensor to measure the absolute position |
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step1 |
Type: Step Description: Generate step signal of type Real |
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step2 |
Type: Step Description: Generate step signal of type Real |
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constantSpeed1 |
Type: ConstantSpeed Description: Constant speed, not dependent on torque |
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step3 |
Type: Step Description: Generate step signal of type Real |