Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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A Study on the Lift-off Characteristics of an Air-lubricated Bump Foil Journal Rearing

공기윤활 범프 저어널 베어링의 부상 특성에 관한 연구

  • 이용복 (한국과학기술연구원 트라이볼로지 연구센터) ;
  • 김창호 (한국과학기술연구원 트라이볼로지 연구센터) ;
  • 이남수 (한양대학교 대학원 기계설계학과) ;
  • 최동훈 (한양대학교 대학원 기계설계학과)
  • Published : 2001.12.01
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Abstract

In this paper the effect of bump compliance, load, and the number of pad on the lift-off speed is studied. When the load is greater and bump compliance lower, the shaft is lifted off at higher rotating speed. And when the load is applied near the center of pad, lift-off speed is lower. When the number of pad increases, the lift-off speed is higher. The lift-off characteristics can be used to lengthen the lift time of the coating and design the rotating machinery supported by bump bearings.

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References

  1. SAE Paper Application of Air Bearings to High-Speed Turbo -machinery Barnett, M. A.;Silver A.
  2. ASME J. of Trib. v.116 Advancements in the Performance of Aerodynamic Foil Journal Bearings High Speed and Load Capacity Heshmat, H.
  3. AIAA-91-2103 CP A Feasibility Study on the Use of Foil Bearings in Cryogenic Turbopumps Heshmat, H.
  4. U.S. Patent No. 4,0005,914 Surface Coatings for Machine Elements Having Rubbing Surfaces Newan, P.
  5. NASA/CR-1999-208-689 Rotordynamics and Design Methods of an Oil-Free Turbocharger Howard, S. A.
  6. ASME/STLE Tribology Conf. Load Capacity Estimation of Foil Air Journal Bearings for Oil-Free Turbomachinery Applications Dellacorte C.;Valco M. J.
  7. STLE Tri. Trans. v.37 Structural Stiffness and Coulomb Damping in Compliant Foil Journal Bearings: Theoretical Considerations Roger Ku C.-P;Heshmat H
  8. Modern Development in Lubrication Mechanics Walowit J. A.;Arno J. N.
  9. ASME J. of Lub. Tech. v.105 Analysis of Gas-Lubricated Foil Journal Bearings Heshmat H;Walowit J. A.;Pinkus O.

Cited by

  1. 회전체동역학 분야 연구동향 vol.5, pp.1, 2001, https://doi.org/10.5293/kfma.2002.5.1.095
  2. 공기 포일 스러스트 베어링의 하중지지능력에 관한 연구 vol.25, pp.5, 2001, https://doi.org/10.9725/kstle.2009.25.5.292