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Rolling bearings lubricated with refrigerant.

Number: pap. 1250

Author(s) : HAULEITNER R., MORALES-ESPEJEL G. E., MEEUWENOORD R., et al.

Summary

Oil-free operation, high overall efficiency and low environmental impact are main drivers in the refrigeration compressor industry. The use of pure refrigerant for bearing lubrication supports these industry trends and is a reliable alternative to other oil-free solutions such as magnetic bearing systems. This paper describes the pure refrigerant lubrication technology for rolling element bearings. It is shown that refrigerants are capable of forming film thickness in the concentrated contact. Film thickness measurements on a ball on disk setup with one low (R-1233zd) and one medium vapor pressure (R-1234ze) refrigerant are presented. Further, functional bearing tests on a dedicated pure refrigerant lubrication test rig have been performed with the refrigerants R-134a and R-1233zd. The results in relation to friction and power consumption measurements in bearings are reported and underline the potential of this technology. At the same time it is attempted to derive valid operating limits.

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Pages: 10

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Details

  • Original title: Rolling bearings lubricated with refrigerant.
  • Record ID : 30024265
  • Languages: English
  • Source: 2018 Purdue Conferences. 24th International Compressor Engineering Conference at Purdue.
  • Publication date: 2018/07/09

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