Table of Contents Author Guidelines Submit a Manuscript
International Journal of Rotating Machinery
Volume 2010 (2010), Article ID 962804, 12 pages
http://dx.doi.org/10.1155/2010/962804
Research Article

Condition Monitoring of Forward Curved Centrifugal Blower Using Coast Down Time Analysis

1Department of Mechanical & Industrial Engineering, Caledonian College of Engineering, P.O. Box 2322, CPO 111 Seeb, Oman
2Advisor to Chancellor, VIT University, Vellore, Tamil Nadu 632 014, India
3Associate Dean (PGS and R), Caledonian College of Engineering, P.O. Box 2322, CPO 111 Seeb, Oman

Received 19 April 2010; Accepted 17 August 2010

Academic Editor: R. Amano

Copyright © 2010 G. R. Rameshkumar et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Linked References

  1. B. K. N. Rao, Handbook of Condition Monitoring, Elsevier Advanced Technology, Oxford, UK, 1st edition, 1996.
  2. D. E. Bently, Fundamentals of Rotating Machinery Diagnostics, Bently Pressurized Bearing Press, Minden, La, USA, 2002.
  3. P. John, Shaft Alignment Handbook, CRC Press; Taylor & Francis Group LLC, New York, NY, USA, 3rd edition, 2007.
  4. K. P. Ramachandran, “Vibration signature analysis for machine health monitoring and fault diagnosis,” Caledonian Journal of Engineering, pp. 26–39, 2004. View at Google Scholar
  5. T. L. Daugherty and R. J. Craig, “Coast down time as a mechanical condition indicator,” DTNSRDC Report, pp. 45-47, 1976.
  6. T. L. Daugherty and R. J. Craig, “Coast down time as a mechanical condition indicator for vertical axis motors with grease-lubricated ball bearings,” American Society of Lubrication Engineers Transactions, pp. 349–357, 1977. View at Google Scholar
  7. G. D. Xistris and D. C. Watson, “Using rundown time as bearing life indicator,” Mechanical Engineering, vol. 98, no. 5, pp. 20–23, 1976. View at Google Scholar · View at Scopus
  8. K. P. Ramachandran, M. Z. K. Malik, and A. Abdul Harees, “CDT analysis as a tool for evaluating bearing lubrication and mechanical conditions,” Caledonian Journal of Engineering, pp. 19–24, 2004. View at Google Scholar
  9. R. E. Browne, K. P. Ramachandran, A. K. M. De Silva, and D. K. Harrison, “An experimental investigation to analyse the effect of unbalance in a horizontal rotor system using coast-down factor,” International Journal of COMADEM, vol. 10, no. 3, pp. 11–18, 2007. View at Google Scholar · View at Scopus
  10. B. S. Prabhu, “An experimental investigation on the misalignment effects in journal bearings,” Tribology Transactions, vol. 40, no. 2, pp. 235–242, 1997. View at Google Scholar · View at Scopus
  11. P. Arumugam, S. Swarnamani, and B. S. Prabhu, “Effects of journal misalignment on the performance characteristics of three-lobe bearings,” Journal of Wear, vol. 206, no. 1-2, pp. 122–129, 1997. View at Google Scholar · View at Scopus
  12. A. S. Sekhar and B. S. Prabhu, “Effects of coupling misalignment on vibrations of rotating machinery,” Journal of Sound and Vibration, vol. 185, no. 4, pp. 655–671, 1995. View at Publisher · View at Google Scholar · View at Scopus
  13. G. Santhanakrishnan, B. S. Prabhu, and B. V. A. Rao, “An experimental investigation of tribological effects on coastdown phenomena in horizontal rotating machinery,” Journal of Wear, vol. 91, no. 1, pp. 25–31, 1983. View at Google Scholar · View at Scopus
  14. K. P. Ramachandran, M. Mahadevappa, M. K. Ravishankar, and A. Ramakrishna, “An approach to machine misalignment studies using vibration, orbit and coast down phenomena,” in Proceedings of the International Conference on Advances in Mechanical and Industrial Engineering, University of Roorkee, Roorkee, India, 1997.
  15. S. Prabhakar, A. S. Sekhar, and A. R. Mohanty, “Vibration analysis of a misaligned rotor-coupling-bearing system passing through the critical speed,” Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, vol. 215, no. 12, pp. 1417–1428, 2001. View at Publisher · View at Google Scholar · View at Scopus
  16. S. M. Huang, W. L. Chen, C. H. Yau, and C. K. Sung, “Effects of misalignment on the transmission characteristics of magnetic couplings,” Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, vol. 215, no. 2, pp. 227–236, 2001. View at Publisher · View at Google Scholar · View at Scopus
  17. K. M. Al-Hussain and I. Redmond, “Dynamic response of two rotors connected by rigid mechanical coupling with parallel misalignment,” Journal of Sound and Vibration, vol. 249, no. 3, pp. 483–498, 2002. View at Publisher · View at Google Scholar · View at Scopus
  18. K. M. Al-Hussain, “Dynamic stability of two rigid rotors connected by a flexible coupling with angular misalignment,” Journal of Sound and Vibration, vol. 266, no. 2, pp. 217–234, 2003. View at Publisher · View at Google Scholar · View at Scopus
  19. D. L. Dewell and L. D. Mitchell, “Detection of a misaligned disk coupling using spectrum analysis,” Transactions of the American Society of Mechanical Engineers, Journal of Vibration, Acoustics, Stress, and Reliability in Design, vol. 106, no. 1, pp. 9–15, 1984. View at Google Scholar
  20. M. Xu and R. D. Marangoni, “Vibration analysis of a motor-flexible coupling-rotor system subject to misalignment and unbalance, part I: theoretical model and analysis,” Journal of Sound and Vibration, vol. 176, no. 5, pp. 663–679, 1994. View at Publisher · View at Google Scholar · View at Scopus
  21. M. Xu and R. D. Marangoni, “Vibration analysis of a motor-flexible coupling-rotor system subject to misalignment and unbalance, part II: experimental validation,” Journal of Sound and Vibration, vol. 176, no. 5, pp. 681–691, 1994. View at Publisher · View at Google Scholar · View at Scopus
  22. P. N. Saavedra and D. E. Ramírez, “Vibration analysis of rotors for the identification of shaft misalignment part 1: theoretical analysis,” Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, vol. 218, no. 9, pp. 971–985, 2004. View at Publisher · View at Google Scholar · View at Scopus
  23. P. N. Saavedra and D. E. Ramírez, “Vibration analysis of rotors for the identification of shaft misalignment part 2: experimental validation,” Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, vol. 218, no. 9, pp. 987–999, 2004. View at Publisher · View at Google Scholar · View at Scopus
  24. J. K. Sinha, A. W. Lees, and M. I. Friswell, “Estimating unbalance and misalignment of a flexible rotating machine from a single run-down,” Journal of Sound and Vibration, vol. 272, no. 3–5, pp. 967–989, 2004. View at Google Scholar · View at Scopus
  25. M. A. Hili, T. Fakhfakh, and M. Haddar, “Failure analysis of a misaligned and unbalanced flexible rotor,” Journal of Failure Analysis and Prevention, vol. 6, no. 4, pp. 73–82, 2006. View at Publisher · View at Google Scholar · View at Scopus
  26. Y.-S. Lee and C.-W. Lee, “Modelling and vibration analysis of misaligned rotor-ball bearing systems,” Journal of Sound and Vibration, vol. 224, no. 1, pp. 17–32, 1999. View at Google Scholar · View at Scopus
  27. M. A. Hili, T. Fakhfakh, L. Hammami, and M. Haddar, “Shaft misalignment effect on bearings dynamical behavior,” International Journal of Advanced Manufacturing Technology, vol. 26, no. 5-6, pp. 615–622, 2005. View at Publisher · View at Google Scholar · View at Scopus
  28. A. W. Lee, “Some studies on misalignment in rigid coupling,” in Proceedings of the 7th International Conference on Rotor Dynamics (IFTOMM '07), Vienna, Austria, 2007.
  29. A. W. Lees, “Misalignment in rigidly coupled rotors,” Journal of Sound and Vibration, vol. 305, no. 1-2, pp. 261–271, 2007. View at Publisher · View at Google Scholar · View at Scopus
  30. A. Muszynska, “Vibrational diagnostics of rotating machinery malfunctions,” International Journal of Rotating machinery, vol. 1, no. 3-4, pp. 237–266, 1995. View at Google Scholar
  31. F. B. Bleier, Fan Handbook Selection, Application, and Design, McGraw-Hill, London, UK, 1998.
  32. G. R. Rameshkumar, B. V. A. Rao, and K. P. Ramachandran, “An experimental investigation to study the effect of misalignment using CDT as a condition monitoring parameter for rotating machinery,” in Proceedings of the 22nd International Congress of Condition Monitoring and Diagnostic Engineering Management ( COMADEM '09), pp. 531–539, San Sebastian, Spain, 2009.
  33. LabVIEW 7 Express, User Manual, National Instruments Corporate Headquarters, USA, 2003.
  34. LabVIEW 7 Express, User Manual, Measurements Instruments Corporate Headquarters, USA, 2003.
  35. J. S. Shighley and C. R. Mischke, Hand book of Machine Design, McGraw Hill, New York, NY, USA, 1976.