WOLFRAM SYSTEM MODELER

PressureReducingValve

Static pressure reducing valve

Diagram

Wolfram Language

In[1]:=
SystemModel["Hydraulic.Valves.PressureControl.Internal.PressureReducingValve"]
Out[1]:=

Information

This is a static model of a pressure reducing valve.

Limitations

This model does not contain lumped volumes, so it does not integrate the flow and compute the pressure at the ports.

Parameters (8)

medium

Value: Oil()

Type: Medium

Description: Medium in the component

Gleak

Value: 1e-020

Type: PressureDependentLeakage (m³/(s⋅Pa))

Description: Leakage between orifices

Gbleed

Value: 1e-010

Type: ConductanceOfLaminarResistance (m³/(s⋅Pa))

Description: Conductance of oil bleed passage

pMax

Value: 21000000.0

Type: Pressure (Pa)

Description: Pressure when valve is fully closed

pMin

Value: 20000000.0

Type: Pressure (Pa)

Description: Pressure when valve starts to close

t1

Value: 0.1

Type: Time (s)

Description: Time constant for first-order system

AMax

Value: 0.01

Type: Area (m²)

Description: Maximum opening area

Cd

Value: 0.62

Type: Real

Description: Coefficient of discharge for the opening

Connectors (2)

port_b

Type: Port_b

Description: Port for hydraulic fluid (unfilled icon)

port_a

Type: Port_a

Description: Port for hydraulic fluid (filled icon)

Components (8)

medium

Type: Medium

Description: Medium in the component

flowAB

Type: ControlledOrifice

Description: Controlled restriction

spool

Type: SpoolH

Description: Model of a hydraulic spool

tank

Type: Tank

Description: Simple tank with constant pressure

add1

Type: Add

Description: Output the sum of the two inputs

const

Type: Constant

Description: Generate constant signal of type Real

limiter

Type: Limiter

Description: Limit the range of a signal

oilBleedPassage

Type: RestrictionLaminar

Description: Laminar restriction using conductance

Used in Components (1)

PressureReducingValve

Hydraulic.Valves.PressureControl

Pressure valve, controlled by the pressure difference between the ports