PressureCompensator

    PressureCompensator

Library

HydraulicsByFluidon/Components/Valves/PressureValves

Description

The component PressureCompensator is a partial physical model of a 2-way pressure compensator with signal based dynamics of the spool. The flow characteristic of fully opened valve is given by parameters Nominal volume flow and Nominal pressure difference.

The valve controls a differential pressure between an externally supplied measuring point (port X) and pressure at port B. The controlled pressure difference is given by Differential pressure, the valve dynamics by Response time of valve spool.

Internally a variable resistor is adjusted with (pDifferential - (fluidPortB.p - fluidPortX.p)) * Feedback factor)) as input. Feedback factor is used to influence the accuracy of the pressure compensator.

These valves are used for load pressure independent regulation of flow rates of consumers. In combination with manually actuated or proportional throttle, pressure compensators can be used for the load-independent lifting and lowering of variable loads at the same velocities. They act thereby as pressure compensated flow control valves.

Another typical application are LS-systems where they are used to compensate the influence of different load pressures of several actuators.

Parameters

PressureCompensator_0

NameLabelDescriptionData TypeValid Values

mo_pDifferential

pDifferential

Differential pressure

Scalar

mo_NominalVolumeFlow

NominalVolumeFlow

Nominal volume flow

Scalar

mo_NominalPressureDifference

NominalPressureDifference

Nominal pressure difference

Scalar

mo_ReferenceDensity

ReferenceDensity

Reference density for volume flow and pressure difference

Scalar

mo_timeConst

timeConst

Response time of valve spool

Scalar

mo_deadVolume

deadVolume

Dead volume at ports

Scalar

PressureCompensator_1

NameLabelDescriptionData TypeValid Values

mo_forwardFluidProperties

forwardFluidProperties

Forward fluid properties between ports

Scalar

true
false

PressureCompensator_2

NameLabelDescriptionData TypeValid Values

mo_volumeFlowA

volumeFlowA

volumeFlowA

Structure

mo_volumeFlowA/fixed

fixed

Cell of scalars

true
false

mo_volumeFlowA/start

start

Cell of scalars

mo_volumeFlowB

volumeFlowB

volumeFlowB

Structure

mo_volumeFlowB/fixed

fixed

Cell of scalars

true
false

mo_volumeFlowB/start

start

Cell of scalars

mo_pA

pA

pA

Structure

mo_pA/fixed

fixed

Cell of scalars

true
false

mo_pA/start

start

Cell of scalars

mo_pB

pB

pB

Structure

mo_pB/fixed

fixed

Cell of scalars

true
false

mo_pB/start

start

Cell of scalars

mo_relX

relX

relX

Structure

mo_relX/fixed

fixed

Cell of scalars

true
false

mo_relX/start

start

Cell of scalars

Ports

NameTypeDescriptionIO TypeNumber

fluidPortA

implicit

Hydraulic port A

input

1

fluidPortB

implicit

Hydraulic port B

input

2

fluidPortX

implicit

Hydraulic port X

input

3