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Navigation: Library > Iconic Diagrams > Hydraulics > Valves > twotwowayproportionalvalve-states |
  
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Iconic Diagrams\Hydraulics\Valves
Domains: Continuous. Size: 1-D. Kind: Iconic Diagrams (Hydraulics).
This model describes a 2/2-way proportional 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 TwoTwoWayProportionalValve.htm.
Ports |
Description |
pa, pb |
Both terminals of the valve. |
Causality |
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preferred effort out pa preferred effort out pb |
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Inputs |
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spoolpos |
position of the spool valve: 0 =closed, 1 = open 0 <= spoolpos <= 1 |
Parameters |
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Nominal flow at nominal pressure per edge, spool in the open position [m3/s], Q_nom > 0. |
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TwoTwoWayDirectionalValve\Q_leak TwoTwoWayDirectionalValve\p_nom TwoTwoWayDirectionalValve\overlap 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) |