WOLFRAM SYSTEM MODELER

LoadHoldingCircuit

Example circuit of a cylinder lifting and holding a mass

Diagram

Wolfram Language

In[1]:=
SystemModel["Hydraulic.Examples.Translation.LoadHoldingCircuit"]
Out[1]:=

Information

This example model shows how to move and hold a load with a cylinder and a counter-balance valve. During lifting, the check valve component of the counter-balance valve allows flow. During lowering, high pressure on the pilot port opens the relief valve component of the counter-balance valve. When the load is not lowered or lifted, the check valve prevents the flow.

Fig. 1 shows how the cylinder is lifted and Fig. 2 shows how the check valve allows flow during the lifting.

loadHoldingCircuitPlot1
Fig. 1 Load position

loadHoldingCircuitPlot2
Fig. 2 Flow through the check valve

Reference

Industrial Hydraulics Manual, 5th ed., Maumee, OH: Eaton Hydraulics Training Services, 2008 p. 294.

Parameters (1)

medium

Value: Oil()

Type: Medium

Description: Medium in the component

Components (17)

medium

Type: Medium

Description: Medium in the component

tank1

Type: Tank

tank2

Type: Tank

pump

Type: Pump

tank3

Type: Tank

mass

Type: Mass

positionSensor

Type: PositionSensor

cylinderDouble

Type: CylinderDouble

const

Type: Constant

constantSpeed

Type: ConstantSpeed

pressureReliefValve

Type: PressureReliefValve

min1

Type: Min

stopStep

Type: Step

startStep

Type: Step

controlValve

Type: PCVE43TandemCenter

gravitationalForce

Type: ConstantForce

counterBalanceValve

Type: CounterBalanceValve