A vibration model for fault diagnosis of planetary gearboxes with localized planet bearing defects
- 292 Downloads
Fault diagnosis of localized bearing defects of planetary gear system is studied in this paper. A gear-bearing coupling dynamics model of planetary gear trains is established based on a nonlinear bearing dynamics model with two degrees of freedom and a bending-torsion coupling dynamics model of planetary gear trains. Both the Hertzian contact between rolling elements and raceways, bearing clearance, gear backlash, time-varying mesh stiffness, and gravity excitation are taken into account in the model. The localized defects in both inner and outer raceways are modeled as half sinusoidal waves. Then, the theoretical model is solved numerically and the vibrational responses are obtained. Through time domain analysis and envelope analysis, the fault characteristic frequencies of inner/outer raceway defects are obtained. It is shown that the fault frequencies are greatly modulated by the rotation frequencies of the planet and carrier. When a defect occurs on the inner raceway, the modulation frequency is the rotational frequency of the carrier. For the defect on the outer raceway, the modulation frequency changes into the difference between the rotational frequencies of the planet and carrier. The influence of the defect depth, defect width and defect location on the vibration characteristics of the system is analyzed. The simulation results are verified by a test of bearing defects on a certain planetary gear train.
KeywordsFault diagnosis Planetary gearboxes Localized planet bearing defects Vibration model
Unable to display preview. Download preview PDF.
- J. Ribrant, Reliability performance and maintenance-a survey of failures in wind power systems, Sweden: Royal Institute of Technology (2006).Google Scholar
- C. Hatch, Improved wind turbine condition monitoring using acceleration enveloping, Orbit (2004) 58–61.Google Scholar
- J. Sopanen and A. Mikkola, Dynamic model of a deepgroove ball bearing including localized and distributed defects, Part 1: theory, Proc. Instn Mech. Engrs Part K: J. Multi-body Dynamics, 217 (3) (2003) 201–211.Google Scholar
- B. Betea, P. Dobra and M Trusca, Simplified mathematical model of the bearings with defects, System Theory, Control and Computing (ICSTCC), 16th International Conference, Sinaia, October, 12-14 (2012).Google Scholar
- P. K. Kankar, S. C. Sharma and S. P. Harsha, Fault diagnosis of high speed rolling element bearings due to localized defects using response surface method, Transactions of the ASME, Journal of Dynamic Systems, Measurement, and Control, 133 (3) (2011) 200–205.Google Scholar
- N. E. Gürkan and H. N. Özgüven, Interactions between backlash and bearing clearance nonlinearity in geared flexible rotors, ASME 2007 International Design Engineering Technical Conferences and ASME International Power Transmission and Gearing Conference, Las Vegas, Nevada, USA, September 4-7 (2007).Google Scholar
- D. E. Gianluca et al., On the diagnostics of planet gear bearings, Proceedings of the 9th IFToMM International Conference on Rotor Dynamics, Mechanisms and Machine Science (2015).Google Scholar
- Z. P. Feng, H. Q. Ma and M. J. Zuo, Vibration signal models for fault diagnosis of planet bearings, Journal of Sound and Vibration, http://dx.doi.org/10.1016/j.jsv.2016.01.041.Google Scholar
- J. Sharad and H. Hugh, Vibration response of a windturbine planetary gear set in the presence of a localized planet bearing defect, International Mechanical Engineering Congress & Exposition IMECE2011, Denver, Colorado, USA, November 11-17 (2011).Google Scholar
- S. Jain, P. Whiteley and H. Hunt, Detection of planet bearing faults in wind turbine gearboxes, Proceedings of the International Conference on Noise and Vibration Engineering (ISMA)/International Conference on Uncertainty in Structural Dynamics (USD), Leuven, Belgium, September 17-19 (2012).Google Scholar