WOLFRAM SYSTEM MODELER
SequenceValvePressure valve, controlled by the pressure at port_a |
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Diagram
Wolfram Language
In[1]:=
SystemModel["Hydraulic.Valves.PressureControl.SequenceValve"]
Out[1]:=
Information
This is a model of a pressure compensating valve with lumped volumes. If the pressure at port a is higher than pMin, the valve starts to open. When the pressure reaches pMax, the valve is fully open. The spool model has first-order dynamics with time constant t1.
Implementation
This valve basically consists of an orifice controlled by a spool.Reference
Industrial Hydraulics Manual, 5th ed., Maumee, OH: Eaton Hydraulics Training Services, 2008 p. 291.Parameters (8)
| medium |
Value: Oil() Type: Medium Description: Medium in the component |
|---|---|
| V |
Value: 0.0001 Type: Volume (m³) Description: Volume of control valve |
| Gleak |
Value: 9.999999999999999e-21 Type: PressureDependentLeakage (m³/(s⋅Pa)) Description: Leakage between ports |
| pMax |
Value: 21000000.0 Type: Pressure (Pa) Description: Pressure when valve is fully opened |
| pMin |
Value: 20000000.0 Type: Pressure (Pa) Description: Pressure when valve starts to open |
| t1 |
Value: 0.01 Type: Time (s) Description: Time constant for first-order system |
| AMax |
Value: 0.001 Type: Area (m²) Description: Maximum opening area |
| Cd |
Value: 0.62 Type: Real Description: Coefficient of discharge for the opening |
Connectors (2)
Components (5)
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medium |
Type: Medium Description: Medium in the component |
|---|---|---|
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pressureCompensatingValve |
Type: PressureCompensatingValveNormallyClosed Description: Static pressure compensating valve |
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volume_a |
Type: Volume Description: Fixed volume with fluid storage |
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volume_b |
Type: Volume Description: Fixed volume with fluid storage |
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tank1 |
Type: Tank Description: Simple tank with constant pressure |
Used in Examples (1)
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Hydraulic.Examples.MultipleActuators Example circuit with two cylinders working in a sequence |