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MapleSim Hydraulics Library from Modelon

Constant Flow Pump  Constant flow pump

The Constant Flow Pump component produces a constant volumetric flow. It consists of a simple pump, a flow-control valve (three-port flow controller) and a pressure relief valve. This type of pump is commonly used to give constant flow in, for example, hydraulic power steering.

Connections

Name

Description

Modelica ID

oil

 

oil

flangeEngine

 

flange_Engine

portB

Hydraulic port where oil leaves the component

port_B

portA

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

port_A

Parameters

Name

Default

Units

Description

Modelica ID

prwpclosed

1.9·107

Pa

Valve closed if &Delta;p smaller

prw_p[closed]

prwpopen

2.05·107

Pa

Valve wide open if &Delta;p higher

prw_p[open]

flow rate

1

 

Constant output value

flowRate

Dpump

10-4

m3

Displacement per revolution

Dpump

Gint

10-13

m3sPa

Conductance of internal leakage

Gint

Gext

10-13

m3sPa

Conductance of external leakage

Gext

external leakage

true

 

If true, a small amount of oil leaks to the tank components

externalLeakage

use volume A

false

 

If true, a volume is present at port_A

useVolumeA

use volume B

true

 

If true, a volume is present at port_B

useVolumeB

J

0.01

kgm2

Moment of inertia

J

&Delta;Tsystem

0

K

Temperature offset from system temperature

dT_system

See Also

Pumps, MapleSim Hydraulics Library from Modelon Overview


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