VariableFlowPump
Partial Pump
Library
HydraulicsByFluidon/Components/Pumps
Description
The component VariableFlowPump constitutes a model of a flow source in which the delivery is calculated from the given nominal flow, the input signal, the leakage, and the suction pressure.
Both internal and external leakage depend on the adjacent pressure difference.
The parameter nominalVolumeFlow refers to the flow at Port A (suction side).
The valid range of the input signal at port setpoint is 0 < signal < 1. Therefore 1 corresponds to 100 % of the nominal volume flow.
minSuctionPressure takes into account that a pump requires a minimaum suction pressure for full flow. Below this pressure, the flow rate is reduced. In this model, the reduction is assumed to be simplified as a linear function of suction pressure in relation to minSuctionPressure.
VariableFlowPump does not provide a model of the physical design of a pump but only copies its characteristic features. Thus, physical parameters (e. g. inertia moment or hydraulic-mechanical efficiency) are not parameterized.
Parameters
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo_nominalVolumeFlow | nominalVolumeFlow | Nominal volume flow, A -> B | Scalar | |
mo_minSuctionPressure | minSuctionPressure | Pressure limit at suction port below which flow is reduced | Scalar | |
mo_deadVolume | deadVolume | Dead volume at ports | Scalar | |
mo_leakageFlowRateInternal | leakageFlowRateInternal | Internal leakage: volume flow | Scalar | |
mo_leakagePressureDiffInternal | leakagePressureDiffInternal | Internal leakage: pressure difference | Scalar | |
mo_leakageFlowRateExternal | leakageFlowRateExternal | External leakage: volume flow | Scalar | |
mo_leakagePressureDiffExternal | leakagePressureDiffExternal | External leakage: pressure difference | Scalar | |
mo_leakageReferenceDensity | leakageReferenceDensity | Reference density for volume flow and pressure difference | Scalar | |
mo_useLeakagePort | useLeakagePort | Enable leakage port, otherwise implicitly connected with tank | Number | 0 |
mo_pA | pA | pA | Structure | |
mo_pA/fixed | fixed | Cell of scalars | true | |
mo_pA/start | start | Cell of scalars | ||
mo_pB | pB | pB | Structure | |
mo_pB/fixed | fixed | Cell of scalars | true | |
mo_pB/start | start | Cell of scalars |
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo_forwardFluidProperties | forwardFluidProperties | Forward fluid properties between ports | Scalar | true |
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo__nmodifiers | Number of Modifiers | Specifies the number of modifiers | Number | |
mo__modifiers | Modifiers | Add new modifier | Structure | |
mo__modifiers/varname | Variable name | Cell of strings | 'volumeFlowA' | |
mo__modifiers/attribute | Attribute | Cell of strings | 'start' | |
mo__modifiers/value | Value |
Ports
| Name | Type | Description | IO Type | Number |
|---|---|---|---|---|
fluidPortA | implicit | Hydraulic port A | input | 1 |
fluidPortB | implicit | Hydraulic port B | input | 2 |
setpoint | implicit | input | 3 | |
Port 4 | implicit | Hydraulic port Leakage | input | mo_useLeakagePort |