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MapleSim Hydraulics Library from Modelon

Var Pump  Pump with variable input displacement and volumetric efficiency

This component describes an ideal pump with constant displacement.

Implementation

The flow rate (q) is given by:

q = Dpump  w  volumetricEfficiency / (2  π)

If the inlet pressure is lower than the atmospheric pressure, the delivered flow rate becomes smaller. Flow from port_A to port_B is considered positive.

Variables used in the above equation

q

Flow rate at the outlet port m3s

Dpump

Displacement per revolution m3

w

Angular velocity rads

volumetricEfficiency

Volumetric Efficiency (0-1)

Assumptions

Ideal pump with constant displacement (that is, no losses included).

Connections

Name

Description

Modelica ID

portA

Port A, where oil flows into the component (0<q, pB<pA means 0<&Delta;p)

port_A

portB

Port B, where oil leaves the component (q<0, pB<pA means 0<&Delta;p)

port_B

flangea

 

flange_a

flangeb

 

flange_b

oil

 

oil

VE

 

volumetricEfficiency

Dpump

 

Dpump

Parameters

Name

Default

Units

Description

Modelica ID

&Delta;Tsystem

0

K

Temperature offset from system temperature

dT_system

See Also

Pumps, MapleSim Hydraulics Library from Modelon Overview


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