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Virtual prototyping methodology: predicting start stop movement of pump unit by simulation.

Number: 1189

Author(s) : TERLEVIC B., NERPEL N., NIKITIN D., CASTRO M. S. da

Summary

In a typical, stable operation of a hermetic compressor, a pump unit mounted on a suspension system will constantly vibrate within its shell (housing). During starting and stopping of the compressor, the significantly increased forces in cylinder chamber and rotor-stator coupling will act on the pump unit which will have an increased dynamic response in form of large displacements in all directions. This paper investigates short, but unpredictable starting event and its effect on the pump unit movement. It proposes a fully virtual approach using numerical simulation tools in order to capture and define starting movement and use the data to benefit compressor development.
Combination of modern numerical tools was used to build a numerical model, define boundary conditions, calculate pump unit movement and lastly to map a gap profile based on the results. A part of results was also verified with experimental measurements. Such approach is valuable to the compressor development because it creates a virtual prototype which is cheaper, faster, more flexible and has a higher repeatability compared to alternative, hardware-oriented approaches. Methods and results from this work can be used to design a compressor shell more efficiently. Such development would otherwise require multiple physical shell prototypes, that are expensive and complex to produce, especially in the early stages of a development project.

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Pages: 10 p.

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Details

  • Original title: Virtual prototyping methodology: predicting start stop movement of pump unit by simulation.
  • Record ID : 30030276
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 26th International Compressor Engineering Conference at Purdue.
  • Publication date: 2022/07/15

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