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Navigation: Library > Iconic Diagrams > Hydraulics > Valves > TwoTwoWayValve-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 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.
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 spoolpos < 0.5 => valve is closed spoolpos >= 0.5 => valve is open |
Parameters |
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TwoTwoWayDirectionalValve\GLeak TwoTwoWayDirectionalValve\Amax TwoTwoWayDirectionalValve\overlap Va\V Va\B Va\p_initial Vb\V Vb\B Vb\p_initial |
Mass density of the fluid [kg/m3]. Conductance of the laminar leakage flow [m3/s.Pa], GLeak >= 0. Maximum spool valve area when the valve is open [m2], Amax > 0. Discharge coefficient [], Cd > 0. The valve overlap in closed position [], -1 < overlap < 1. Bandwidth of the spool dynamics [Hz], f > 0. Damping of the spool dynamics [], d > 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) |