Clear Filters
Clear Filters

Isothermal Fluids Pump/Motor Case Drain

4 views (last 30 days)
Philip Lane
Philip Lane on 22 Mar 2024
Answered: Yifeng Tang on 27 Mar 2024
Will there be case drain options available at some point for pump/motor models in Simscape Fluids?
The models are working well overall but there are some corner case problems that result from not having case drains. For example, when a model is static (no rotary motion) the pressure doesn't bleed off from A/B ports as it would naturally in a typical closed-circuit hydrostatic transmission. To work around this I've added very small orifice models to replicate A-to-Case and B-to-Case leakage that is typical for axial piston motors.
If another solution exists already please advise.
Thank you

Answers (1)

Yifeng Tang
Yifeng Tang on 27 Mar 2024
Hi Philip,
I feel the way you model it is very reasonable. Adding an small orifice or check valve mimics what happens in real life.
A similar modeling concept may be found in this actuator block: https://www.mathworks.com/help/hydro/ref/doubleactingactuatoril.html where the diagram shows how the leakage is implemented, and indeed it's an orifice.
The parametrization of that orifice will require some empirical data though.

Categories

Find more on Simscape Fluids in Help Center and File Exchange

Products


Release

R2023a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!