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Influence of compressor speed fluctuation on bearings design.

Number: 0398

Author(s) : DA SILVA CASTRO M., TERLEVIC B., GULIC M., MURAKAMI E.

Summary

Bearings reliability can be affected by multiple factors. Depending on the load and inertia of the rotating parts, the speed of the compressor during one cycle can fluctuate significantly. The main research objective is to investigate how speed fluctuation affects bearings design. The question is whether a fast variation of speed can significantly impact hydrodynamic and asperity power losses, contact pressures or minimum oil film thickness, which potentially influence bearing reliability. The software GT-Suite was used to estimate the speed fluctuation for several compressor application conditions. Then, the software AVL Excite was used to run multi-body dynamics simulation with elastohydrodynamic (EHD) bearings and flexible bodies to identify their critical conditions. A simplified model with one EHD bearing was used to estimate the effect of speed fluctuation on peak asperity contact pressure, showing this methodology´s applicability in minimizing the impact of speed fluctuation on compressor reliability.

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Pages: 8

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Details

  • Original title: Influence of compressor speed fluctuation on bearings design.
  • Record ID : 30028232
  • Languages: English
  • Subject: Technology
  • Source: 10th IIR Conference on Compressors and Refrigerants.
  • Publication date: 2021/01/13
  • DOI: http://dx.doi.org/10.18462/iir.compr.2021.0398
  • Document available for consultation in the library of the IIR headquarters only.

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