MapleSim Hydraulics Library from Modelon - MapleSim Help

Online Help

All Products    Maple    MapleSim


Home : Support : Online Help : MapleSim Toolboxes : MapleSim Hydraulics Library from Modelon : Cylinders : ModelonHydraulics/Cylinders/PlungerCylinder

MapleSim Hydraulics Library from Modelon

Plunger Cylinder  Single acting plunger cylinder

This model is a plunger cylinder with a single rod and damping at the end modeled with a spring and damper. This model has one active volume with external leakage. External leakage can be turned off by clearing the hasExternalLeakage setting (found under the Properties tab ( ) in the Parameters   Leakage section).

Cylinder Geometry This is a simplified overview of the geometric parameters defining the cylinder geometry:

Mechanical Friction This model includes Stribeck Friction (see the following figure).

 

Variables

Connections

Parameters

Variables

Name

Value

Units

Description

Modelica ID

chamber

 

 

Chamber

chamber

pistonInCylinder

 

 

Single rod piston in a cylinder

pistonInCylinder

friction

 

 

Friction between piston and cylinder

friction

external leakage

 

 

External leakage

externalLeakage

environment

 

 

 

environment

pAsummary

pA

Pa

Pressure at port A

summary_pA

Pmechsummary

[1]

W

Mechanical translational power

summary_MP

fbsummary

fb

N

Force acting on flange b

summary_fb

fbearingsummary

mount.f

N

Force acting on bearing

summary_fbearing

qchamsummary

chamber.qcham

m3s

Flow rate flowing into Chamber

summary_qCham

strokesummary

[2]

m

Cylinder stroke

summary_stroke

vsummary

[3]

ms

Cylinder velocity

summary_v

Phydsummary

chamber.summary_HP

W

Hydraulic Power in chamber A

summary_HP

[1] fbs.b+fmounts.mount

[2] pistonInCylinder.motion.s_rel

[3] pistonInCylinder.motion.v_rel

Connections

Name

Description

Modelica ID

portA

Port A, where oil flows into the component (positive q, port_A.p > chamberA.p means positive dp)

port_A

flangeb

Piston rod mounting point b

flange_b

mount

Cylinder housing mounting point.

mount

Parameters

General Parameters

Name

Default

Units

Description

Modelica ID

rod

12

m

Length of rod

RodLength

housing

2

m

Length of housing

HousingLength

mpiston

100

kg

Effective mass of piston and rigidly coupled masses

PistonMass

cA

108

Nm

Stiffness of stop at stroke end A

c_A

dA

106

Nsm

Damping of stop at stroke end A

d_A

Vdead

0.001

m3

Dead volume of chamber if piston is at left end of housing (side a: stroke = 0)

dead_volume

Apiston

0.01

m2

Piston area

piston_area

kp

0

 

Pressure damping coefficient

kp

ΔTsystem

0

K

Temperature offset from system temperature

dT_system

reverse

false

 

Reverse the positive flow in the component

reverse

Friction Parameters

Name

Default

Units

Description

Modelica ID

fbreakaway

100

N

 

breakaway_friction

fmixed

10

N

 

mixed_friction

vfmixed

110

ms

 

mixed_friction_velocity

dviscous

2.5·103

Nsm

 

viscous_damping

tabular

false

 

If true, use tabular models, else an analytic one

Tabular

fpos

0.,1.

 

[v, f] Positive sliding friction characteristic (v>=0)

f_pos

Initialization Parameters

Name

Default

Units

Description

Modelica ID

initial stroke

12housing

m

Initial stroke of cylinder, default is middle position

InitialStroke

Leakage Parameters

Name

Default

Units

Description

Modelica ID

has external leakage

true

 

If true, external leakage at rod seal is included

hasExternalLeakage

Gext

4.2·10-13

m3sPa

Hydraulic conductance for external leakage

G_ext

See Also

Cylinders

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