WOLFRAM SYSTEM MODELER

BrakeCircuit

Example circuit with a brake valve

Diagram

Wolfram Language

In[1]:=
SystemModel["Hydraulic.Examples.Rotation.BrakeCircuit"]
Out[1]:=

Information

This model shows an example of how a brake valve can be used in a hydrostatic transmission. The brake valve closes when the pressure drops on its pilot port. This allows pressure to build up on the motor outlet, which causes it to slow down faster.

Fig. 1 shows how the motor initially accelerates and then stops. Fig. 2 shows how the brake valve closes when the motor is brought to a halt. Fgi. 3 shows how the pressure at the motor outlet is kept high as long as the motor is rotating and the brake valve is closed.

brakeCircuitPlot1
Fig. 1 Motor speed

brakeCircuitPlot2
Fig. 2 Brake valve opening state

brakeCircuitPlot3
Fig. 3 Pressure on motor outlet

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 (14)

medium

Type: Medium

Description: Medium in the component

controlValve

Type: PCVE43OpenCenter

pump

Type: Pump

motor

Type: Motor

pressureReliefValve

Type: PressureReliefValve

brakeValve

Type: BrakeValve

tank1

Type: Tank

tank2

Type: Tank

tank3

Type: Tank

speed

Type: Speed

constSpeedCmd

Type: Constant

const1

Type: Constant

speedSensor

Type: SpeedSensor

stepBrake

Type: Step