Spool Valve

Spool valve with an input signal that controls the orifice area

 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 ${V}_{A}$  and ${V}_{B}$ 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 $\mathrm{portA}$ Upstrem hydraulic port portA $\mathrm{portB}$ Downstream hydraulic port portB $\mathrm{Area}$ Real input; area of orifice in selected units Area

Parameters

General Parameters

 Name Default Units Description Modelica ID ${C}_{d}$ $\frac{7}{10}$ Flow-discharge coefficient Cd ${\mathrm{\Re }}_{\mathrm{Cr}}$ $12$ Reynolds number at critical flow ReCr Area unit ${m}^{2}$ Unit of area used in input signal areaUnit

Volume Parameters

 Name Default Units Description Modelica ID Use volume A $\mathrm{false}$ When true a hydraulic volume chamber is added to portA useVolumeA ${V}_{A}$ $1·{10}^{-6}$ ${m}^{3}$ Volume of chamber A Va Use volume B $\mathrm{false}$ When true a hydraulic volume chamber is added to portB useVolumeB ${V}_{B}$ $1·{10}^{-6}$ ${m}^{3}$ Volume of chamber B Vb