WOLFRAM SYSTEM MODELER
AutomaticAccumulatorDischargeExample circuit with automatic discharge of an accumulator |
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Diagram
Wolfram Language
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SystemModel["Hydraulic.Examples.Accumulators.AutomaticAccumulatorDischarge"]
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Information
This example shows how a pilot-operated check valve can be used to automatically discharge an accumulator. When the pump is running, the high pressure from the pump keeps the pilot-operated check valve closed. When the pump is turned off, the pressure on the pilot port on the pilot-operated check valve drops. When this happens, the check valve opens and helps to discharge the accumulator.
Fig. 1 shows how the pump speed ramps up to a certain level, stays there, and then ramps down. Fig. 2 shows how the mass flow rate through the pilot-operated check valve peaks when the pump is turned off.
Fig. 1 Pump speed
Fig. 2 Mass flow through the pilot-operated check valve
Fig. 1 shows how the pump speed ramps up to a certain level, stays there, and then ramps down. Fig. 2 shows how the mass flow rate through the pilot-operated check valve peaks when the pump is turned off.
Fig. 1 Pump speed
Fig. 2 Mass flow through the pilot-operated check valve
Reference
Industrial Hydraulics Manual, 5th ed., Maumee, OH: Eaton Hydraulics Training Services, 2008 p. 188.Parameters (1)
| medium |
Value: Oil() Type: Medium Description: Medium in the component |
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Components (14)
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medium |
Type: Medium Description: Medium in the component |
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pilotOperatedCheckValve |
Type: PilotOperatedCheckValvePilotToClose Description: Pilot-operated check valve with lumped volumes |
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pump |
Type: Pump Description: Model of a pump with fixed displacement and volumes |
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tank1 |
Type: Tank Description: Simple tank with constant pressure |
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tank2 |
Type: Tank Description: Simple tank with constant pressure |
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speed |
Type: Speed Description: Forced movement of a flange according to a reference angular velocity signal |
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tank3 |
Type: Tank Description: Simple tank with constant pressure |
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accumulator |
Type: GasChargedAccumulator Description: Hydraulic accumulator |
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min |
Type: Min Description: Pass through the smallest signal |
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checkValve |
Type: CheckValve Description: Check valve with lumped volumes |
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rampStartPump |
Type: Ramp Description: Generate ramp signal |
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rampStopPump |
Type: Ramp Description: Generate ramp signal |
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fixedLaminarThrottle1 |
Type: FixedLaminarThrottle Description: Laminar restriction using conductance |
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fixedLaminarThrottle2 |
Type: FixedLaminarThrottle Description: Laminar restriction using conductance |