WOLFRAM SYSTEM MODELER
DCVH33Hydraulically actuated proportional control valve with three ports and three states |
 |
Diagram
Wolfram Language
In[1]:=
SystemModel["Hydraulic.Valves.DirectionalControl.HydraulicActuation.DCVH33"]
Out[1]:=
Information
This is a model of a control valve with five ports and three states. The valve has a tank port t, a pressure port p, a load port a, 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.
Control valve with three ports and three states
Valve at center position, u = 0; there is only leakage flow between the ports if there is no overlap
Valve at right position, u = -1; there is flow from a to t
Valve at left position, u = 1; there is flow from p to a
Control valve with three ports and three states
Valve at center position, u = 0; there is only leakage flow between the ports if there is no overlap
Valve at right position, u = -1; there is flow from a to t
Valve at left position, u = 1; there is flow from p to a
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 (5)
 |
port_a |
Type: Port_b Description: Port for hydraulic fluid (unfilled icon) |
|---|---|---|
 |
port_t |
Type: Port_a Description: Port for hydraulic fluid (filled icon) |
|
port_p |
Type: Port_a Description: Port for hydraulic fluid (filled icon) |
|
port_p1 |
Type: Port_a Description: Port for hydraulic fluid (filled icon) |
|
port_p2 |
Type: Port_b Description: Port for hydraulic fluid (unfilled icon) |
Components (8)
 |
medium |
Type: Medium Description: Medium in the component |
|---|---|---|
 |
flow_at |
Type: ControlledOrifice Description: Controlled restriction |
|
flow_pa |
Type: ControlledOrifice Description: Controlled restriction |
 |
volume_t |
Type: Volume Description: Fixed volume with fluid storage |
|
volume_p |
Type: Volume Description: Fixed volume with fluid storage |
|
volume_a |
Type: Volume Description: Fixed volume with fluid storage |
 |
gain1 |
Type: Gain Description: Output the product of a gain value with the input signal |
 |
spoolH1 |
Type: SpoolH Description: Model of a hydraulic spool |