WOLFRAM SYSTEM MODELER

DCVH63

Hydraulically actuated proportional control valve with four ports and three states

Diagram

Wolfram Language

In[1]:=
SystemModel["Hydraulic.Valves.DirectionalControl.HydraulicActuation.DCVH63"]
Out[1]:=

Information

This is a model of a control valve with eight ports and three states. The valve has a tank port t, a pressure port p, four load ports a, b, c1, and c2 and two pilot ports p1 and p2. The insignal, u, to the spool is the pressure difference between ports p1 and p2. The valve is controlled by a hydraulic spool with first-order dynamics; see SpoolH.

This valve is similar to DCVH43ClosedCenter; the only difference is that the two ports c1 and c2 are connected in the middle state.

Implementation

This valve basically consists of orifices controlled by a spool.

Parameters (9)

medium

Value: Oil()

Type: Medium

Description: Medium in the component

V

Value: 0.0001

Type: Volume (m³)

Description: Volume of control valve

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

pMin

Value: 10000.0

Type: Pressure (Pa)

Description: Pressure difference when the valve starts to move

pMax

Value: 500000.0

Type: Pressure (Pa)

Description: Pressure difference when the valve has reached its maximum position

t1

Value: 0.01

Type: Time (s)

Description: Time constant for first-order system

Connectors (8)

port_p

Type: Port_a

port_t

Type: Port_a

port_b

Type: Port_b

port_a

Type: Port_b

port_c1

Type: Port_a

port_c2

Type: Port_b

port_p2

Type: Port_b

port_p1

Type: Port_a

Components (12)

medium

Type: Medium

Description: Medium in the component

volume_a

Type: Volume

volume_b

Type: Volume

volume_t

Type: Volume

volume_p

Type: Volume

rightState

Type: CrossOver4Port

leftState

Type: Straight4Port

middleState

Type: ControlledOrifice

abs1

Type: Abs

add1

Type: Add

const

Type: Constant

spoolH1

Type: SpoolH