MapleSim Hydraulics Library from Modelon - MapleSim Help

Online Help

All Products    Maple    MapleSim


Home : Support : Online Help : MapleSim Toolboxes : MapleSim Hydraulics Library from Modelon : Volumes : ModelonHydraulics/Volumes/Chamber

MapleSim Hydraulics Library from Modelon

Chamber  Oil-filled chamber with a moveable piston and pressure-dependent compressibility

The Chamber component describes an oil-filled chamber that has a moveable, frictionless, and massless piston. The volume is given by

Veff=Vdead+sbsarodApiston

There is a check whether

stroke=sbsarod

is greater than zero during the simulation.

To compute the pressure in the chamber, an equation for the bulk modulus is needed. It uses the oil model defined on the system level. The bulk modulus is given by

β=βpA

The calculated pressure is not limited to the vapor pressure but can reach unlimited negative values. A limitation is done for the computed force where the relevant pressure is limited by the vapor pressure. Another limitation is implemented in TwoPortComp where all pressures used to compute the differential pressure between the ports are limited to the vapor pressure. Detailed information about the bulk modulus of the oil is given in the documentation for OilVolume. Use the modifier

port_A(p(start=2e6,fixed=true))

to set the initial condition for the pressure in the chamber in Pa.

Connections

Name

Description

Modelica ID

oil

 

oil

flangea

 

flange_a

flangeb

 

flange_b

portA

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

port_A

Parameters

General Parameters

Name

Default

Units

Description

Modelica ID

reverse

false

 

Reverse the sign convention, see documentation for details

reverse

nports

0

 

Number of ports

nPorts

Apiston

0.01

m2

Piston area

piston_area

rod

0.005

m

Rod length

RodLength

Vdead

10-6

m3

Dead volume for stroke = 0

dead_volume

&Delta;Tsystem

0

K

Temperature offset from system temperature

dT_system

See Also

OilVolume, Volumes, MapleSim Hydraulics Library from Modelon Overview


Download Help Document

Was this information helpful?



Please add your Comment (Optional)
E-mail Address (Optional)
What is ? This question helps us to combat spam