Instantaneous Circular Pitch Cyclic Power (ICPCP) – A Tool for Diagnosis of Planetary Gearboxes

Abstract:

The process of monitoring and diagnosis of planetary gearboxes is currently one of the most significant topics for vibroanalysis. The reason for ubiquitous research activities on the topic arises form a shortage of efficient method for a non-destructive thorough vibration analysis of planetary gearboxes, especially working under low speeds. On the other hand, the number of high-value planetary gearboxes working in industry rises rapidly, mainly due to expansion of wind farms. In the paper, the authors present a novel method for the assessment of the technical state of planetary gearboxes with a vibration sensor mounted on the casing, and without a planets position sensor. The method is based on the calculation of cyclic energy of gearbox teeth contact within consecutive carrier revolutions. The methods performance is illustrated on a real data from a wind turbine.

• Periodical: Key Engineering Materials (Volume 518)
• Pages: 168-173
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.518.168
• Online since: July 2012
• Authors: Adam Jablonski, Tomasz Barszcz
• Keywords: Cyclic Signal Analysis, Instantaneous Signal Power, Planetary Gearbox Diagnostics

References

[1] D. McMillan, G.W. Ault, Quantification of Condition Monitoring Benefit for Offshore Wind Turbines, Wind Engineering, Volume 31, Issue 4 (2007), pp.267-285.

DOI: 10.1260/030952407783123060

[2] A. Jablonski, T. Barszcz, M. Bielecka, Automatic validation of vibration signals in wind farm distributed monitoring systems, Measurement, Volume 44, Issue 10 (2011), p.1954-(1967).

DOI: 10.1016/j.measurement.2011.08.017

[3] A. Jablonski, T. Barszcz, Validation of vibration measurements for heavy duty machinery diagnostics, submitted to Mechanical Systems and Signal Processing (2011).

DOI: 10.1016/j.ymssp.2013.01.015

[4] L.F. Villa et al., Angular resampling for vibration analysis in wind turbines under non-linear speed fluctuation, Mechanical Systems and Signal Processing, Volume 25, Issue 6 (2011), pp.2157-2168.

DOI: 10.1016/j.ymssp.2011.01.022

[5] R.B. Randall, A new method of modeling gear faults, ASME Journal of Mechanical Design, Volume 104, No. 2 (1982), pp.259-267.

DOI: 10.1115/1.3256334

[6] P.D. McFadden, Determining the location of a fatigue crack in a gear from the phase of the change in the meshing vibration, Mechanical Systems and Signal Processing, Volume 2, Issue 4 (1988), pp.403-409.

DOI: 10.1016/0888-3270(88)90063-5

[7] J.D. Smith, Gear Noise and Vibration, second ed., Marcel Dekker, Inc., New York, (2003).

[8] J. Maczak, Local meshing plane as a source of diagnostic information for monitoring the evolution of gear faults, Proceedings of the 4th World Congress on Engineering Asset Management, Athens, Greece (2009).

DOI: 10.1007/978-0-85729-320-6_77

[9] A. Belsak, J. Flasker, Method for detecting fatigue crack in gears, Theoretical and Applied Fracture Mechanics, Volume 46, Issue 2 (2006), pp.105-113.

DOI: 10.1016/j.tafmec.2006.07.002

[10] P.D. McFadden, J.D. Smith, Signal processing technique for detecting local defects in a gear from the signal average of the vibration, Proceedings of the Institution of Mechanical Engineers - Part C: Journal of Mechanical Engineering Science, Volume 199, No. 4 (1985).

DOI: 10.1243/pime_proc_1985_199_125_02

[11] P.D. McFadden, Examination of a technique for early detection of failures in gears by signal processing of the time domain average of the meshing vibration, Mechanical Systems and Signal Processing, Volume 1, Issue 2 (1987), pp.173-183.

DOI: 10.1016/0888-3270(87)90069-0

[12] C.M. Vicuna, Contributions to the analysis of vibrations and acoustic emissions for the condition monitoring of epicyclic gearboxes, PhD Thesis, RWTH Aachen University (2009).

[13] W. Bartelmus et al., Modelling of gearbox dynamics under time-varying nonstationary load for distributed fault detection and diagnosis, European Journal of Mechanics - A/Solids, Volume 29, Issue 4 (2010), pp.637-646.

DOI: 10.1016/j.euromechsol.2010.03.002

[14] B.D. Forrester, Method for the separation of epicyclic planet gear vibration signatures, U.S. Patent 6, 298, 725 (2001).

[15] D.M. Blunt, Synchronous averaging of epicyclic sun gear vibration, Patent application No. WO200406592 (A1).