Vibration Monitoring of Rotating Systems
- 1
- 2
- 3
- 4
- 5
Abstract
Most energy-conversion machines (e.g. vehicle engines and electric motors) involve rotating components (e.g. roller bearings and gears), which generate vibrations. The behavior of a pump which includes a deliberate fault was chosen to illustrate this assertion. The test bearing at the driven end of the pump’s motor was deliberately damaged using a 1.5mm wire-cutting method and an adjustable coupling disk introduced to impose a shaft misalignment of 40. The resulting undesirable behavior of the pump was observed. Experimental data were measured at various speeds of the rotor. The sample period at various operating frequencies were 0.9, 0.6 and 0.45s respectively. The ball-passage frequency was observed at 4.4, 8.8, 13.2 and 17.6Hz. A computer-based analytical model was developed, in visual basic, for monitoring the machine failures: this led to an integrated system-process algorithm for diagnosis of faults in rotating components.
- R. Wilfried, S. Ulrich, P. Oliver, S. Christian, and W. B. Fiedrich, “Basics of vibration monitoring for fault detection and process control,” Non-Destructive Testing Department, Institute of Materials Science, University of Hanover, Garbsen, Germany, pp. 23–28, 2003.
- J. S. Hansen, Harker, and G. Roger, “A new method for rolling-element bearing monitoring in the petrochemical industry,” Proceeding of the Vibration Institute Machinery Vibration Monitoring and Analysis Meeting, New Orleans, pp. 34–45, 1984.
- D. E. Bently, “Monitoring rolling-element bearings,” Orbit Article, Bently Corporation, Nevada, pp. 12–23, 1982.
- D. B. Spencer and J. S. Hensen, “Better way to monitor bearings,” Hydrocarbon Processing, pp. 2–7, 1985.
- E. A. Ogbonnaya, “Thermodynamics of steam and gas turbines,” Oru’s Press Ltd, Port Harcourt, Nigeria, pp. 11, 2004.
- V. B. Alexej and N. A. Bakorva, “Diagnostics of gearing and geared couplings using envelope spectrum methods,” Vibro Acoustical Systems and Technologies (VAST), Inc., Saint-Petersburg, Russia, 1994. Online Available: http://www.vibrotek.com/bio/anb.htm.
- B. E. Parker Jr, H. V. Poor, E. C. Larson, T. A. Hamilton, and J. P. Frankel, Noise Conference, Proceedings of the Statistical Change Detection Using Non-Linear Models, USA, pp. 319–324, 1997.
- S. David, “Predictive intelligent machining and machine- monitoring sensors,” March Consulting Group (Managing Maintenance into the 1990’s), 1989. Online Available: http://www.vibanalysis.co.uk/the author/about. html.
- 01db Steel Technologies, Metravib, 2001. Online Available: http://www.01db-metravib.com (Assessed 26 December, 2005).
- A. V. Barkov and N. A. Barkova, “Automatic diagnostics of rolling-element bearings using enveloping methods,” Proceedings of the 18th Annual Meeting, The Vibration Institute, USA, pp. 21–23, 1995.
- E. A. Ogbonnaya and K. E. Koumako, “Basic automatic control,” King Tovic International, Port Harcourt, Nigeria, pp. 109–116, 2006.