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Study of mechanical loss reduction on thrust bearings for scroll compressors using CO2 refrigerant.

Author(s) : NAKAO H., MATSUGI T., YANO K., et al.

Summary

The authors have developed a scroll compressor employing CO2 refrigerant, whose capacity is 9.4 kW. The CO2 refrigerant has different characteristics from the refrigerants they have used for air-conditioning systems and refrigerators. There is particularly a large difference between the suction and discharge pressures of the CO2 refrigerant. Therefore, a large compression load is applied to the thrust bearing and the lubrication condition of the thrust bearing becomes critical. The authors have studied the lubrication of thrust bearings theoretically and experimentally. The average Reynolds equation by Patier and Cheng and the solid contact theories by Greenwood and Williamson and Greenwood and Tripp were used. The method of calculation and the adequacy of the calculated results were verified by model elemental experiments. The calculated frictional characteristics have properties similar to a Stribeck curve. The accurate configuration of the wedge film calculated improves the accuracy of the calculated frictional characteristics of the thrust bearing.

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Details

  • Original title: Study of mechanical loss reduction on thrust bearings for scroll compressors using CO2 refrigerant.
  • Record ID : 2008-2484
  • Languages: English
  • Source: 2008 Purdue Conferences. 19th International Compressor Engineering Conference at Purdue & 12th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Publication date: 2008/07/14

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