ShuttleValve

    ShuttleValve

Library

HydraulicsByFluidon/Components/Valves/CheckValves

Description

The component ShuttleValve is the model of a changeover valve with Dead volume at each port. It connects port C (the middle port) with the port that has the highest pressure. The flow characteristic is represented by an orifice.

SwitchingThreshold defines deadband to avoid chattering. The shuttle valve switches from A to B when

pressure A > (pressure B + SwitchingThreshold)

and switches from B to A when

pressure A < (pressure B - SwitchingThreshold)

A typical application of this valve is in a load sensing system to determine the highest load pressure.

Note: Due to small volumes between the ShuttleValve and connected components and switching action, a very high numerical stiffness may occur, resulting in small step sizes.

Parameters

ShuttleValve_0

NameLabelDescriptionData TypeValid Values

mo_NominalVolumeFlow

NominalVolumeFlow

Nominal volume flow

Scalar

mo_NominalPressureDifference

NominalPressureDifference

Nominal pressure difference

Scalar

mo_ReferenceDensity

ReferenceDensity

Reference density for volume flow and pressure difference

Scalar

mo_SwitchingThreshold

SwitchingThreshold

Pressure threshold to switch between ports

Scalar

mo_deadVolume

deadVolume

Dead volume at ports

Scalar

mo_resistorType

resistorType

Type of the resistor

Structure

mo_resistorType/choice1

Orifice

Number

0
1

mo_resistorType/choice2

Throttle

Number

0
1

ShuttleValve_1

NameLabelDescriptionData TypeValid Values

mo_forwardFluidProperties

forwardFluidProperties

Forward fluid properties between ports

Scalar

true
false

ShuttleValve_2

NameLabelDescriptionData TypeValid Values

mo_pA

pA

pA

Structure

mo_pA/fixed

fixed

Cell of scalars

true
false

mo_pA/start

start

Cell of scalars

mo_pB

pB

pB

Structure

mo_pB/fixed

fixed

Cell of scalars

true
false

mo_pB/start

start

Cell of scalars

mo_pC

pC

pC

Structure

mo_pC/fixed

fixed

Cell of scalars

true
false

mo_pC/start

start

Cell of scalars

Ports

NameTypeDescriptionIO TypeNumber

fluidPortA

implicit

Hydraulic port A

input

1

fluidPortB

implicit

Hydraulic port B

input

2

fluidPortC

implicit

Hydraulic port C

input

3