The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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A Study on the Reliability of an Air Foil Journal Bearing for High Speed Turbomachinery

고속 터보기계용 공기 포일 저널 베어링의 신뢰성에 관한 연구

  • 김태호 (한국과학기술연구원 트라이볼로지 연구센터) ;
  • 이용복 (한국과학기술연구원 트라이볼로지 연구센터) ;
  • 김창호 (한국과학기술연구원 트라이볼로지 연구센터) ;
  • 이남수 (한양대학교 기계설계공학과)
  • Published : 2003.06.01
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Abstract

This paper describes reliability characteristics of an air foil journal bearing for high-speed turbomachinery at a room temperature. To verify the reliability of air foil journal bearing, lift-off characteristics, load carrying capacity, and 10,000 cycle start-stop test were performed with a motor-driven test rig. A lift-off test shows the relationship between the rotating speed of the shaft and the frictional torque with bearing surface. About a load-carrying capacity, the tested air foil journal bearing produced a load capacity of 500N at an operating speed of 15,000rpm, which is compared with results of numerical analysis and empirical coefficients. Finally, the trends in change of start torque, stop torque, and bearing temperature were shown during a 10,000-cycle start-stop test of an air foil journal bearing. We found that an air foil bearing performs well, as a supported bearing for the high-speed turbocompressor.

Keywords

References

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