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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.

 

Variables

Connections

Parameters

Variables

Name

Value

Units

Description

Modelica ID

conPump

 

 

 

conPump

reliefValve

 

 

 

reliefValve

threeWayFC

 

 

 

threeWayFC

const

 

 

 

const

gain

 

 

 

gain

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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