Spool Valve - MapleSim Help

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Spool Valve

Spool valve with an input signal that controls the orifice area

 

Description

Optional Volumes

Connections

Parameters

Description

The Spool Valve component models a spool valve controlled by a signal that sets the orifice area.

The pressure-flow characteristic is based on the equations of the Orifice component.

Optional Volumes

The boolean parameters Use volume A and Use volume B, when true, add optional volumes VA  and VB to ports A and B, respectively. See Port Volumes for details.

If two orifices or valves are connected, enabling a volume at the common port reduces the the stiffness of the system and improves the solvability.

Connections

Name

Description

Modelica ID

portA

Upstrem hydraulic port

portA

portB

Downstream hydraulic port

portB

Area

Real input; area of orifice in selected units

Area

Parameters

General Parameters

Name

Default

Units

Description

Modelica ID

Cd

710

 

Flow-discharge coefficient

Cd

Cr

12

 

Reynolds number at critical flow

ReCr

Area unit

m2

 

Unit of area used in input signal

areaUnit

Volume Parameters

Name

Default

Units

Description

Modelica ID

Use volume A

false

 

When true a hydraulic volume chamber is added to portA

useVolumeA

VA

1·10−6

m3

Volume of chamber A

Va

Use volume B

false

 

When true a hydraulic volume chamber is added to portB

useVolumeB

VB

1·10−6

m3

Volume of chamber B

Vb

For more information see Port Volumes.

See Also

Hydraulics Library

Valves