PropPressureControlValve

    PropPressureControlValve

Library

HydraulicsByFluidon/Components/Valves/PressureValves

Description

The component PropPressureControlValve is a model of a 3-port pressure control valve with an input of set pressure. It maintains a largely constant outlet pressure even at a variable (higher) supply pressure. In addition to a 2-port pressure reducing valve it also reduces the outlet pressure to tank.

The set pressure is calculated by Input * Input scaling. If input should be in the range of 0 to 10 [V] and maximum set pressure 200e5 Pa, Input scaling must be set to 20e5 [Pa/V] (200e5 / 10). If the set pressure should be given directly by input, Input scaling must be set to 1. Please note: the upper value of set pressure is not limited but only proportional to input.

If supply pressure pA is less than Set pressure (relative value) the valve acts like an orifice with the characteristics Nominal volume flow and Nominal pressure difference.

For all pressures deviating from Set pressure (relative value) the valve opens and the flow increases linearly following the slope given by parameters Nominal volume flow and Pressure drop. For flow P->A the outlet pressure deviates by Deviation P-A @ Nominal volume flow and by Deviation P-A @ -Nominal volume flow for flow A->T.

The component PressureControlValve is not a model of a pressure control valve according to its physical structure. It merely represents the characteristic behavior of a pressure control valve. Therefore dynamic effects such as forces due to inertia will not be represented.

Parameters

PropPressureControlValve_0

NameLabelDescriptionData TypeValid Values

mo_InputScaling

InputScaling

Input scaling

Scalar

mo_DeviationPA

DeviationPA

Deviation P-A

Scalar

mo_DeviationAT

DeviationAT

Deviation A-T

Scalar

mo_gain

gain

Controller gain

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

PropPressureControlValve_1

NameLabelDescriptionData TypeValid Values

mo_relX

relX

relX

Structure

mo_relX/fixed

fixed

Cell of scalars

true
false

mo_relX/start

start

Cell of scalars

mo_pP

pP

pP

Structure

mo_pP/fixed

fixed

Cell of scalars

true
false

mo_pP/start

start

Cell of scalars

mo_pT

pT

pT

Structure

mo_pT/fixed

fixed

Cell of scalars

true
false

mo_pT/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_volumeFlowP

volumeFlowP

volumeFlowP

Structure

mo_volumeFlowP/fixed

fixed

Cell of scalars

true
false

mo_volumeFlowP/start

start

Cell of scalars

mo_volumeFlowT

volumeFlowT

volumeFlowT

Structure

mo_volumeFlowT/fixed

fixed

Cell of scalars

true
false

mo_volumeFlowT/start

start

Cell of scalars

mo_volumeFlowA

volumeFlowA

volumeFlowA

Structure

mo_volumeFlowA/fixed

fixed

Cell of scalars

true
false

mo_volumeFlowA/start

start

Cell of scalars

mo_Input

Input

Input

Structure

mo_Input/fixed

fixed

Cell of scalars

true
false

mo_Input/start

start

Cell of scalars

Ports

NameTypeDescriptionIO TypeNumber

portA

implicit

Hydraulic port A

input

1

portP

implicit

Hydraulic port P

input

2

portT

implicit

Hydraulic port T

input

3

Input

implicit

input

4