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WOLFRAM SYSTEM MODELER

DCVM22

Mechanically actuated proportional valve with two ports and two states

Diagram

Wolfram Language

In[1]:=

SystemModel["Hydraulic.Valves.DirectionalControl.MechanicalActuation.DCVM22"]

Out[1]:=

Information

This is a model of a control valve with two ports and two states. The valve has two ports, a and b. The insignal, u, to the spool is the force on the mechanical flange. The valve is controlled by a mechanical spool with dynamics; see SpoolM.

Control valve with two ports and two states

The valve is closed, and there is only leakage flow between the ports if there is no overlap

Open valve, u = 1; there is flow from a to b

Implementation

This valve basically consists of an orifice controlled by a spool.

Parameters (10)

medium	Value: Oil() Type: Medium Description: Medium in the component
Gleak	Value: 1e-020 Type: PressureDependentLeakage (m³/(s⋅Pa)) Description: Leakage between orifices
overlap	Value: 0 Type: Length (m) Description: Spool overlap, a number between -1 and 1; 0 if no overlap
AMax	Value: 0.001 Type: Area (m²) Description: Maximum opening area
Cd	Value: 0.62 Type: Real Description: Coefficient of discharge for the opening
V	Value: 0.0001 Type: Volume (m³) Description: Volume of control valve
L	Value: 1 Type: Length (m) Description: Valve length
x0	Value: 0 Type: Position (m) Description: Minimum valve position
f	Value: 80 Type: Frequency (Hz) Description: Spool resonance frequency
d	Value: 0.9 Type: Damping (s⁻¹) Description: Spool damping

Connectors (3)

	port_a	Type: Port_a Description: Port for hydraulic fluid (filled icon)
	port_b	Type: Port_b Description: Port for hydraulic fluid (unfilled icon)
	flange	Type: Flange_a Description: One-dimensional translational flange (left, flange axis directed INTO cut plane)

port_a

Type: Port_a

Description: Port for hydraulic fluid (filled icon)

port_b

Type: Port_b

Description: Port for hydraulic fluid (unfilled icon)

flange

Type: Flange_a

Description: One-dimensional translational flange (left, flange axis directed INTO cut plane)

Components (5)

	medium	Type: Medium Description: Medium in the component
	volume_a	Type: Volume Description: Fixed volume with fluid storage
	volume_b	Type: Volume Description: Fixed volume with fluid storage
	flow_ab	Type: ControlledOrifice Description: Controlled restriction
	spoolWM	Type: SpoolM Description: Model of a mechanic spool