MapleSim Hydraulics Library from Modelon - MapleSim Help

Online Help

All Products    Maple    MapleSim


Home : Support : Online Help : MapleSim Toolboxes : MapleSim Hydraulics Library from Modelon : Elements : ModelonHydraulics/Elements/Leakage

MapleSim Hydraulics Library from Modelon

Leakage  Leakage component

This is a model for a leakage component. For further information, see Templates.Leakage.

 

Equations

Variables

Connections

Parameters

Equations

m_flow=ρπrc31+3e22c2Δp6μL_potherwise

0=fswitch+fA+fB

0=fswitch+fAsupport+fBsupport

ν&equals;noEventnu_a0<&Delta;pnu_botherwise

ρ&equals;noEventrho_a0<&Delta;prho_botherwise

T_a&equals;T0oil&plus;&Delta;Tsystem

T_b&equals;T0oil&plus;&Delta;Tsystem

f&equals;0

mflow&equals;mflowA

mflow&equals;mflowA

μ=`&nu;``&rho;`

νa&equals;νoilpabs&equals;paabs&comma;T&equals;T_a&comma;vair&equals;vgasoil&comma;psat&equals;psat

νb&equals;νoilpabs&equals;pbabs&comma;T&equals;T_b&comma;vair&equals;vgasoil&comma;psat&equals;psat

pa&equals;pA

paabs&equals;pa&plus;patmoil

pb&equals;pB

pbabs&equals;pb&plus;patmoil

rho_a&equals;ρoilpabs&equals;paabs&comma;T&equals;T_a&comma;vair&equals;vgasoil&comma;psat&equals;psat

rho_b&equals;ρoilpabs&equals;pbabs&comma;T&equals;T_b&comma;vair&equals;vgasoil&comma;psat&equals;psat

sarel&equals;sAsAsupport

&Delta;p&equals;papb

sabrel&equals;L

sabrel&equals;switchsBsA

sBsupport&equals;Lswitch&plus;sAsupport

mflowA&plus;mflowB&equals;0

Variables

Name

Value

Units

Description

Modelica ID

srela

 

m

Relative position of flangeA wrt supportA

s_rel_a

srelab

 

m

Relative position of flangeB wrt flangeA

s_rel_ab

f

 

N

Force acting in positive direction of flangeA

f

Ta

 

K

Temperature at port A

T_a

Tb

 

K

Temperature at port B

T_b

pa

 

Pa

Pressure at port A

p_a

pb

 

Pa

Pressure at port B

p_b

paabs

 

Pa

Absolute pressure at port A

p_a_abs

pbabs

 

Pa

Absolute pressure at port B

p_b_abs

ρa

 

kgm3

Density at port A

rho_a

ρb

 

kgm3

Density at port A

rho_b

νa

 

m2s

Viscosity at port A

nu_a

νb

 

m2s

Viscosity at port B

nu_b

mflow

 

kgs

Leakage mass flow

m_flow

&Delta;p

 

Pa

Pressure drop

dp

psat

[1]

Pa

Gas saturation pressure

p_sat

[1] oil.gasSaturationPressureT&equals;Ta&comma;vgas&equals;oil.vgas

Connections

Name

Description

Modelica ID

supportA

 

supportA

supportB

 

supportB

flangeA

 

flangeA

flangeB

 

flangeB

oil

Fluid property model

oil

portA

 

portA

portB

 

portB

Parameters

General Parameters

Name

Default

Units

Description

Modelica ID

reverse

false

 

Reverse the sign convention, see documentation for details

reverse

switch

-1reverse&equals;true1otherwise

 

-1 if reverse, else 1

switch

r

 

m

Radius of cylinder bore

r

c

 

m

Radial clearance (0<c<<r)

c

e

0

m

Eccentricy of piston

e

Lp

 

m

Length of leakage path

L_p

leakagetype

LeakageEnumeration.LAMINAR

 

Leakage type

leakage_type

&Delta;Tsystem

0

K

Temperature offset from system temperature

dT_system

Constant Parameters

Name

Default

Units

Description

Modelica ID

L

0

m

Element length

L

See Also

Elements

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