Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Diagnosis of Cryogenic Pump-Motor Systems Using Vibration and Current Signature Analysis

  • Choi Byeong-Keun (School of Mechanical and Aerospace Engineering, The institute of Marine Industry, Gyeongsang National University) ;
  • Kim Hak-Eun (Korea Gas Technology Corparation) ;
  • Gu Dong-Sik (Department of Mechanical and Precision Engineering, Graduate School, Gyeongsang National University) ;
  • Kim Hyo-Jung (Department of Mechanical and Precision Engineering, Graduate School, Gyeongsang National University) ;
  • Jeong Han-Eul (Department of Mechanical and Precision Engineering, Graduate School, Gyeongsang National University)
  • Published : 2006.07.01
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Abstract

In general, to send out natural gas via a pipeline network across the nation in LNG terminal, high-pressure cryogenic pump supply highly compressed LNG to high-pressure vaporization facilities. The Number of cryogenic pumps determined the send-out amount in LNG receiving terminal. So it is main equipment at LNG production process and should be maintained on best conditions. In this paper, to find out the cause of high vibration at cryogenic pumps-motor system in LNG terminal, vibration spectrum analysis and motor current signature analysis have been performed together. Through the analysis, motor rotor bar problems are estimated by the vibration analysis and confirmed by the current analysis. So, it is demonstrated through the case study in this paper, how performing vibration analysis and current signature analysis together can reliable diagnosis rotor bar problems in pump-motor system.

Keywords

References

  1. Berry, P. E. and James, E, 1999, Comparison of Motor Current Analysis and Vibration Analysis in Detecting Rotor Bar and Air-gap Eccentricity Problems in Induction Motors, Technical Association of Charlotte. Charlotte. NC
  2. Bonnet, A. H. and Soukup, G. C., 1992, 'Cause and Analysis of stator and Rotor Failures in Three-phase Squirrel-cage Induction Motors,' IEEE Trans. Industrial Application, Vol. 28, No. 4, pp.921-937 https://doi.org/10.1109/28.148460
  3. James E. Berry, 1994, IRD Advancement Training ANALYSIS II, Technical Associates of Charlotte, Inc. Chapter 4, pp.61-68
  4. Lee, B. J., 1998, Handbook of Rotating Machinery Vibration and Maintenance for Local Engineer, Korea Electric Power Corporation, Vol. 1, pp. 543-560
  5. William R. Finley, Mark M. Hodowanec and Warren G. Holter, 2000, 'An Analytical Approach to Solving Motor Vibration Problems,' IEEE Transactions on Industry Applications, Vol. 36, No.5, pp. 1467-1480 https://doi.org/10.1109/28.871297
  6. William T. Thomson and Mark Fenger, 2001, 'Current Signature Analysis to Detect Induction Motor Faults,' IEEE Industrial Application Magazine, July/August, pp.26-34 https://doi.org/10.1109/2943.930988
  7. William T. Thomson and Mark Fenger, 2003, 'Case Histories of Current Signature Analysis to Detect Faults in Induction Motor Drives,' IEEE International Electric Machines and Drives Conference, 1-4 June, Vol. 3, pp. 1459-1465
  8. Yang, B. S., 1998, Cases of Machinery Health Diagnosis, Hyosung Publishing Company
  9. Yang, B. S., 2002, Vibration of Rotating Machinery, Vol. 3, InterVision, pp. 341- 343
  10. Youn, J. D., 1996, A Principal Facilities of LNG Receiving Terminal, Korea Gas Maintenance & Engineering, Vol. 1