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Friction Effects on the Performance of Double-Bumped Air Foil Bearings

이중범프포일 공기베어링의 성능에 미치는 마찰효과

  • 김영철 (한국기계연구원 시스템엔지니어링연구본부) ;
  • 이동현 (한국과학기술원 기계항공시스템학부 대학원) ;
  • 김경웅 (한국과학기술원 기계항공시스템학부)
  • Published : 2007.08.31

Abstract

This paper deals with friction effects on the performance of double-bumped AFBs. The stiffness and damping coefficients of the double bump vary depending on the external load and its friction coefficient. The double bump can be either in the single or double active region depending on vertical deflection. The equivalent stiffness and damping coefficients of the bump system are derived from the vertical and horizontal deflection of the bump, including the friction effect. A static and dynamic performance analysis is carried out by using the finite difference method and the perturbation technique. The results of the performance analysis for a double-bumped AFB are compared with those obtained for a single-bumped AFB. This paper successfully proves that a double bumped AFB has higher load capacity, stiffness, and damping than a single-bumped AFB in a heavily loaded condition.

Keywords

References

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  2. Hooshang Heshmat, 'Operation of Foil Bearings Beyond the Bending Critical Mode,' Journal of Tribology, pp. 192-198,2000
  3. C.DellaCorte and M.J.Valco, 'Load Capacity Estimation of Foil Air Journal Bearing for Oil-Free Turbomachinery Applications,' Trib. Trans., Vol. 43, pp. 795-801,2000 https://doi.org/10.1080/10402000008982410
  4. 김영철, 이동현, 김경웅, '공기포일베어링의 성능에 미치는 범프마찰효과,' 한국윤활학회지, 제21권 제6 호 pp. 283-288, 2005
  5. 김영철, 이동현, 김경웅, '이중범프포일 공기베어링 의 성능해석,' 한국윤활학회지, 제23권 제3호, pp. 123-129, 2007

Cited by

  1. 이중범프 공기포일베어링의 성능시험 vol.25, pp.2, 2007, https://doi.org/10.9725/kstle.2009.25.2.108
  2. 범프 타입 포일 스러스트 베어링의 정하중 구조 강성 및 손실 계수 차이에 관한 실험적 연구 vol.36, pp.6, 2007, https://doi.org/10.9725/kts.2020.36.6.332