Measurement of Oil Film Thickness between Bush and Blade in Swing Type Refrigerant Compressor

  • TANAKA Shinji
    Department of Mechanical Sciences and Engineering, Graduate School of Science and Engineering,Tokyo Institute of Technology
  • ZUO Siyang
    Department of Mechanical Engineering and Science, Faculty of Engineering, Tokyo Institute of Technology
  • HIKAM Achmad
    Department of Mechanical Sciences and Engineering, Graduate School of Science and Engineering,Tokyo Institute of Technology
  • TOYAMA Toshiyuki
    Daikin Industries, Ltd., Rinkai Factory, Sakai Plant

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Other Title
  • スイング式冷媒圧縮機ブッシュ-ブレード間の油膜厚さ測定
  • スイングシキ レイバイ アッシュクキ ブッシュ ブレードカン ノ ユマク アツサ ソクテイ

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Description

A swing type refrigerant compressor was developed in order to overcome problems related to lubrication of a rotary compressor. However, the lubrication condition of the swing compressor has not been measured quantitatively yet. This paper describes an application of an eddy current displacement sensor to measure oil film thickness of a sliding part between a suction side bush and a blade in the swing compressor, and examined lubrication condition of the sliding part and a motion of the bush against the blade under some operating conditions. The results indicate that the sliding part between the suction side bush and the blade forms a wedge shape in shaft angle from 0° to 180° and forms a negative wedge shape in shaft angle from 180° to 360°. In addition, the results show that the oil film thickness on an upper edge side of the bush and a slope angle of the bush against the blade decrease with an increase of discharge pressure and increase with an increase of operating frequency of the compressor.

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