TwoTwoWayValve-States

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TwoTwoWayValve-States

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Iconic Diagrams\Hydraulics\Valves

Use

Domains: Continuous. Size: 1-D. Kind: Iconic Diagrams (Hydraulics).

Description

TwoTwoWayDirectionalValve-States

This model describes a 2/2-way directional control valve with second order spool dynamics and parasitic volumes. The flow through the valve is described as laminar/turbulent flow through an orifice. A detailed description of the valve can be found in TwoTwoWayDirectionalValve.htm.

Interface

Ports

Description

pa, pb

Both terminals of the valve.

Causality

 

preferred effort out pa

preferred effort out pb

 

Inputs

 

spoolpos

position of the spool valve

spoolpos < 0.5 => valve is closed

spoolpos >= 0.5 => valve is open

Parameters

 

TwoTwoWayDirectionalValve\Q_nom

Nominal flow at nominal pressure per edge, spool in the open position [m3/s], Q_nom > 0.

TwoTwoWayDirectionalValve\Q_Leak

TwoTwoWayDirectionalValve\p_nom

TwoTwoWayDirectionalValve\overlap

TwoTwoWayDirectionalValve\f

Va\V

Va\B

Va\p_initial

Vb\V

Vb\B

Vb\p_initial

Leakage flow at nominal pressure per edge [m3/s], Q_leak > 0.

Nominal pressure per edge [Pa], p_nom > 0.

Valve overlap as  percentage of full stroke, -1 < overlap < 1.

Bandwidth of the spool dynamics [Hz], f > 0.

Volume of oil under pressure [m3] (hidden)

Effective bulk modulus [Pa] (hidden)

The starting pressure of the volume [Pa] (hidden)

Volume of oil under pressure [m3] (hidden)

Effective bulk modulus [Pa] (hidden)

The starting pressure of the volume [Pa] (hidden)