WOLFRAM SYSTEM MODELER
PreLoadPreload of a spool using ElastoGap models |
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Diagram
Wolfram Language
In[1]:=
SystemModel["Modelica.Mechanics.Translational.Examples.PreLoad"]
Out[1]:=
Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
When designing hydraulic valves it is often necessary to hold the spool in a certain position as long as an external force is below a threshold value. If this force exceeds the threshold value a linear relation between force and position is desired. There are designs that need only one spring to accomplish this task. Using the ElastoGap elements this design can be modelled easily. Drawing of spool.
Simulate for 100 s and plot the spool position spool.s
as a function of working force force.f.
For positive force, the spool moves in positive direction - in figure below
the start value spool.s.start influences the offset.
Components (17)
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innerContactA |
Type: ElastoGap Description: 1D translational spring damper combination with gap |
|---|---|---|
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innerContactB |
Type: ElastoGap Description: 1D translational spring damper combination with gap |
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spool |
Type: Mass Description: Sliding mass with inertia |
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fixedLe |
Type: Fixed Description: Fixed flange |
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springPlateA |
Type: Mass Description: Sliding mass with inertia |
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springPlateB |
Type: Mass Description: Sliding mass with inertia |
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spring |
Type: Spring Description: Linear 1D translational spring |
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outerContactA |
Type: ElastoGap Description: 1D translational spring damper combination with gap |
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outerContactB |
Type: ElastoGap Description: 1D translational spring damper combination with gap |
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rod1 |
Type: Rod Description: Rod without inertia |
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friction |
Type: Damper Description: Linear 1D translational damper |
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force |
Type: Force Description: External force acting on a drive train element as input signal |
|
housing |
Type: Rod Description: Rod without inertia |
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rod3 |
Type: Rod Description: Rod without inertia |
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rod4 |
Type: Rod Description: Rod without inertia |
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rod2 |
Type: Rod Description: Rod without inertia |
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sineForce |
Type: Sine Description: Generate sine signal |