Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Prediction of Noise and Vibration Characteristics of Externally Pressurized Air Journal Bearings with a Circular Slot Restrictor

원형 슬롯 레스트릭터를 갖는 외부 가압 공기 저널 베어링의 소음 및 진동 특성 예측

  • 노병후 (한국과학기술원 기계공학과) ;
  • 박정구 ((주)알피엠텍 연구개발팀) ;
  • 김경웅 (한국과학기술원 기계공학과)
  • Published : 2003.06.01
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Abstract

The purpose of this paper is to investigate the noise and vibration characteristics of externally pressurized air journal bearings with a circular slot restrictor. To do this, the nonlinear transient analysis including rotor imbalance was performed for a rotor-bearing system. The effects of radial clearance and the length of the bearing and mass eccentricity of the rotor on the noise and vibration characteristics of the bearing are also examined. The results show that the noise and vibration of the rotor-bearing system first increase up to critical speed of the system, and then decrease up to instability threshold speed of the system as the rotational speed of the rotor increases, and the noise of the bearing is markedly influenced by the mass eccentricity of the rotor and the radial clearance and the length of the bearing.

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References

  1. Lund, J. W., 1965, 'The Stability of an Elastic Rotor in Journal Bearings with Flexible, Damped Supports,' Journal of Applied Mechanics, pp. 911-920
  2. Choy, F. K., Braun, M. J. and Hu, Y., 1992, 'Nonlinear Transient and Frequency Response Analysis of a Hydrodynamic Journal Bearings,' ASME, Journal of Tribology, pp. 448-454
  3. Rho, B. H. and Kim, K. W., 2002, 'A Study on Nonlinear Frequency Response Analysis of Hydrodynamic Journal Bearings with External Disturbances,' STLE, Tribology Transactions, Vol. 45, No.1, pp. 117-121 https://doi.org/10.1080/10402000208982529
  4. Lee, J. B. and Kim, K. W., 1999, 'A Study on Stability Characteristics of Actively Controlled Externally Pressurized Air Journal Bearings,' JSME Int. Journal, Series C, Vol. 42, No.2, pp. 427-434 https://doi.org/10.1299/jsmec.42.427
  5. Rho, B. H. and Kim, K. W., 2002, 'A Study on the Dynamic Characteristics of Synchronously Controlled Hydrodynamic Journal Bearings,' Tribology International, Vol. 35, No.5, pp. 339-345 https://doi.org/10.1016/S0301-679X(02)00025-7
  6. Yoon, D. J., Kwon, O. Y., Jung, M. H. and Kim, K. W., 1995, 'Early Detection of Damages in Journal Bearings by AE Monitoring,' Journal of Acoustic Emission, Vol. 13, No.1, pp. 1-10
  7. Miettinen, J. and Anderson, P., 2000, 'Acoustic Emission of Rolling Bearings Lubricated with Contaminated Grease,' Tribology International, Vol. 33, No. 11, pp. 777-787 https://doi.org/10.1016/S0301-679X(00)00124-9
  8. Rho, B. H. and Kim, K. W., 2003, 'Acoustical Properties of Hydrodynamic Journal Bearings,' Tribology International, Vol. 36, No.1, pp. 61-66 https://doi.org/10.1016/S0301-679X(02)00132-9
  9. Rho, B. H., Kim, D. G. and Kim, K. W., 'Noise Analysis of Oil-Lubricated Journal Bearings,' IMechE, Part C, Journal of Mechanical Engineering Science, Vol. 217, No.3, pp. 365-371 https://doi.org/10.1243/095440603762870027
  10. Shires, G. L. and Dee, C. W., 1967, 'Pressurized Fluid Bearings with Inlet Slots,' Proceedings of Gas Bearing Symposium, Univ. Southampton, Paper No.7
  11. Dee, C. W. and Shires, G. L., 1971, 'The Current State of the Art of Fluid Bearings with Discrete Slot Inlets,' ASME, Journal of Lubrication Technology, Vol 93, No.4, pp. 441-450 https://doi.org/10.1115/1.3451615
  12. Rowe, W. B. and Stout, K. J., 1973, 'Design of Externally Pressurized Gas-Fed Journal Bearings Employing Slot Restrictors,' Tribology International, Vol. 6, No.4, pp. 140-147 https://doi.org/10.1016/0301-679X(73)90062-5
  13. Yoshimoto, S. and Nakano, Y., 1984, 'Stability of a Rigid Rotor Supported by Externally Pressurized Gas Journal Bearings with a Circular Slot Restrictor,' JSME Bulletin, Vol. 27, No. 225, pp. 561-568 https://doi.org/10.1299/jsme1958.27.561
  14. Yoshimoto, S., Nakano, Y. and Kakubari, T., 1984, 'Dynamic Properties of Externally-Pressurized Gas Journal Bearings with Circular Slot Restrictors,' JSME Bulletin, Vol. 27, No. 229, pp. 1537-1543 https://doi.org/10.1299/jsme1958.27.1537
  15. Beranek, L. L. and Ver, I. L., 1992, 'Noise and Vibration Control Engineering,' John Wiley & Sons