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MapleSim Hydraulics Library from Modelon

Poppet Lift  Ball poppet lift with sharp edge seat

This is a model of a poppet lift.

Connections

Name

Description

Modelica ID

supportA

 

supportA

supportB

 

supportB

flangeA

 

flangeA

flangeB

 

flangeB

oil

Fluid property model

oil

portA

 

portA

portA1

 

portA1

Parameters

General Parameters

Name

Default

Units

Description

Modelica ID

L

 

m

Element length

L

reverse

false

 

Reverse the sign convention, see documentation for details

reverse

switch

-1reverse=true1otherwise

 

-1 if reverse, else 1

switch

R

0.1

m

Poppet radius

R

r

0.05

m

Throat radius

r

Rrod1

 

m

Rod radius, poppet side

Rrod_1

Rrod2

 

m

Rod radius, seat side

Rrod_2

lift0

0

m

Poppet lift in neutral position

lift_0

V01

[1]

m3

Volume, poppet side, when closed valve

V01

V02

[1]

m3

Volume, seat side, when closed valve

V02

TransitionType

1

 

Type of transition

TransitionType

k1

10

 

Laminar part of flow model

k1

k2

2.04

 

Turbulent part of flow model

k2

Cdmax

0.7

 

Discharge coefficient

Cdmax

λc

14

 

Critical flow number

lambdac

ΔTsystem

0

K

Temperature offset from system temperature

dT_system

[1] 2.0πLR2

Constant Parameters

Name

Default

Units

Description

Modelica ID

Xmin

R2r2

 

minimum distance between ball center and seat

Xmin

flowareamax

[1]

m2

Maximum flow area

flowareamax

Arod1

[2]

m2

Rod area, poppet side

Arod_1

Arod2

[3]

m2

Rod area, seat side

Arod_2

X0

lift0+Xmin_

m

distance from seat to poppet center

X_0

[1] πr2Arod_2

[2] πRrod_12

[3] πRrod_22

See Also

Elements, MapleSim Hydraulics Library from Modelon Overview


Download Help Document

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