A Study about Way to Decide on Residual Unbalance of Rotor-Bearing system

로터-베어링 시스템의 잔류불평형량을 결정하는 방법에 대한 연구

  • 이형우 (부산대학교 기계기술 연구소) ;
  • 이동환 (한국기계연구원 구조연구부 회전체그) ;
  • 박노길 (부산대학교 기계공학) ;
  • 김인환 (진주산업대학교 기계공학과)
  • Published : 2004.09.01

Abstract

A new method to measure residual unbalance of rotor - bearing system was proposed. The method which determine residual unbalance based on polar plot and an analytical method which calculates the residual unbalance of the rotor from the vibration response of the Jeffcott rotor are proposed in this study with respect to a real rotor system of which the residual unbalance is unknown. The unbalance eccentricity of the produced experimental model is 3.78 mil, developing the measurement method of the residual unbalance more convenient than the proposed method of ISO and API standard. The proposed method was experimentally compared with the ISO standard, and the two methods were exactly correspondent to each other within an error of 1%.

Keywords

References

  1. Rieger, N. F., 'Flexible Rotor-Bearing System Dynamics-III. Unbalance Response and Balancing of Flexible Rotor in Bearing,'The Flexible Rotor Systems Subcommittee, The Engineering Division, ASME
  2. ISO Standard, 'Mechanical Vibration-Balancing Quality Requirements of Rigid Rotor,'Ref. No. ISO 1940/1-1986(E), pp. 10-13
  3. API Standard 610, 8th Edition, American Petroleum Institute, Wash D.C., 1995
  4. Tutorial on the API Standard Paragraphs Covering Rotor Dynamics and Balancing: An Introduction to Lateral Critical and Train Torsional Analysis and Rotor Balancing, API Publication 684, 1st Edition, Feb. 1996
  5. Nicholas, J.C., Gunter, E.J., Allaire, P.E., 'Effect of Residual Shaft Bow on Unbalance Response and Balancing of a Single Mass Flexible Rotor,'Engineering for Power, Vol.98, No.2, Apr., pp171-189, 1976 https://doi.org/10.1115/1.3446133
  6. Jackson, C., 'Shop Balancing,'Vibration Institute, Apr. 1993
  7. Walton, J., Lee, C., and Martin, M., 'High Speed Balancing Applied to the T700 Engine,' NASA CR-180899, AVSCOM TR-88-C-007, 1989
  8. Kim, Bong-Suk, Kim, Jong-Soo, Lee, Soo-Hun , 'A Study on the Active Balancing Method for High Speed Spindle System Using Influence Coefficient,' Journal of the Korean Society of Precision Engineering, Vol. 18, No. 8, August, pp. 48-53, 2001
  9. Ehrich, F. F., 'Handbook of Rotor dynamics,' McGraw-Hill, Inc., pp.423-433, 1992
  10. Jeffcott, H. H., 'The Lateral Vibration of Loaded Shafts in the Neighbourhood of a Whirling Speed - The Effect of Balance,' Philosophical Magazine and Journal of Science, Vol. 37, Series 6, pp. 304-314, 1919 https://doi.org/10.1080/14786440308635889