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포일변형 영향계수를 이용한 공기포일베어링 해석

Analysis of Air Foil Bearing using Influence Coefficients of a Bump Foil

  • 김영철 (한국기계연구원 e-엔지니어링연구센터) ;
  • 이동현 (한국과학기술원 기계공학과) ;
  • 김경웅 (한국과학기술원 기계공학과)
  • 발행 : 2006.02.01

초록

This paper presents the influence coefficient method to predict the deflection of bump foil precisely in the sub-structure of AFB(air foil bearing). Heshmat has introduced the simple compliance model to calculate the deflection of bump foil. But this approach can not consider the deflection of bump foil at the edge of AFB, so elasto-hydrodynamic model is insufficient to analyze in case that the eccentricity ratio is greater than 1. Peng has used the average pressure and film thickness, but this approach is not also a realistic model. Influence coefficients of a bump is calculated by finite element method, and introduced in bump deflection equations of the performance analysis of air foil bearing. The effects of the influence coefficient on the bearing performance is discussed in detail for appropriate foil design.

키워드

참고문헌

  1. Walowit, JA., Anno, 'Modem Development of Lubrication Mechanics,' Applied Science Publishers, Ltd., London, 1975
  2. H. Heshmat, J.A. Walowit and O. Pinkus, 'Analysis of Gas-Lubricated Foil Journal Bearings,' ASME J Lubracation Technology, pp. 647-655,1983
  3. C.-P. Roger Ku and H. Heshmat, 'Structural Stiffness and Coulomb Damping in Compliant Foil Journal Bearings : Parametric Studies,' Tribology Transactions, Vol.37, pp. 455-462, 1994 https://doi.org/10.1080/10402009408983317
  4. Z.-C. Peng and M.M. Khonsari, 'Hydrodynamic Analysis of Compliant Foil Bearings With Compressible Air Flow,' ASME J. Tribology, Vol. 126, pp. 542-546, 2004 https://doi.org/10.1115/1.1739242
  5. 김영철, 한정완, 김경웅, '가스포일 저널베어링 및 스러스트베어링의 성능해석,' 한국윤활학회 37회 추계학술대회 논문집, pp.267-272, 2003
  6. 김영철, 한정완, 김경응, 김수용, '공기포일베어링에 지지된 마이크로가스터빈의 회전체동역학적 설계,' 2003 유체기계연구개발발표회 논문집, pp.662-667, 2003
  7. 김영철, 이동현, 김경웅, '범프 포일베어링의 탄성유체윤활 특성 ,'2004 유체기계연구개발발표회 논문집, pp.98-103, 2004
  8. 김영철, 이동현, 김경웅, '범프 포일의 compllance가 포일 저널 베어링의성능에 미치는 영향,'제3회 한국유체공학 학술대회 논문초록집, pp.755-758, 2004
  9. 이동현, 김영철, 김경웅, '범프포일 강성변화에 대한 포일저널 베어링의 정적, 동적 성능해석,'한국윤활학회지, 제20권 제5호, pp.245-251 , 2004
  10. 이동현, 김영철, 김경웅, '범프포일의 3차원 형상을 고려한 공기 포일저널베어링의 정특성해석,' 한국윤활학회 40회 춘계학술대회 논문집, pp.85-90, 2005
  11. D.H. Lee, Y.C. Kim and K.W. Kim, 'The Static Performance Analysis of Air Foil Journal Bearings Considering Three-Dimensional Structure of Bump Foil,' Proceedings of World Tribology Congress 2005, WTC2005-63728, Washington, D.C., September 2005, Washington, D.C., USA
  12. D.H. Lee, Y.C. Kim and K.W. Kim, 'Influence of Coulomb Damping on the Air Foil Journal Bearing Performance,' The 1st Internaltional Conference on Manufacturing, Machine Design and Tribology, THB-105, June 2005, Seoul

피인용 문헌

  1. 회전체 동역학 및 Tribo 요소의 연구동향 vol.10, pp.1, 2007, https://doi.org/10.5293/kfma.2007.10.1.101