Abstract
The correct diagnosis of faulty components in rotating machines requires a pre-knowledge of the characteristics of the system being monitored and the identification of the frequencies of interest. In gearboxes, the number of gear stages and the number of teeth for each gear are required to calculate the gear mesh frequencies and monitor these frequencies and their sidebands. It is not always possible to have this information available, especially in old equipment. In this chapter a fresh approach is presented to deduce such crucial information from the measured vibration signal. The approach focuses on fine tuning harmonic/sideband cursors to capture different gear mesh families. The approach is illustrated on a signal taken from a wind turbine gearbox, which poses the extra challenge of the variable speed within the measurement record. Results show the possibility of identifying the number of teeth for the first two stages with much more confidence than the planetary stage, where a trial and error approach was used to decide on the most likely combination for the ring, sun and planetary gears. This chapter sets a good practice example for understanding the system characteristics by detailed analysis of the vibration signal using finely tuned harmonic and sideband cursors.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Forrester BD (1991) Time-frequency domain analysis of helicopter transmission vibration, department of defence, Aeronautical Research laboratory, Propulsion Report 180
Randall RB (2011) Vibration-based condition monitoring: industrial, aerospace and automotive applications. Wiley, NY
Bonnardot F, El Badaoui M, Randall RB, Danière J, Guillet F (2005) Use of the acceleration signal of a gearbox in order to perform angular resampling (with limited speed fluctuation). Mech Sys Signal Process 19:766–785
Combet F, Gelman L (2007) An automated methodology for performing time synchronous averaging of a gearbox signal without speed sensor. Mech Sys Signal Process 21(6):2590–2606
Coats MD, Sawalhi N, Randall RB (2009) Extraction of Tacho information from a vibration signal for improved synchronous averaging, Paper presented at ACOUSTICS 2009, Australian Acoustical Soc, 23–25 Nov, Adelaide
Combet F, Zimroz R (2009) A new method for the estimation of the instantaneous speed relative fluctuation in a vibration signal based on the short time scale transform. Mech Sys Signal Process 23(4):1382–1397
McFadden PD, Smith JD (1985) An explanation for the asymmetry of the modulation sidebands about the tooth meshing frequency in epicyclic gear vibration., Proc. I.Mech. E. Part CJ. Mech. Eng. Sci. 199(1):65–70
Acknowledgments
This work is partially supported by Mechanical Solutions Inc. and by Australia’s Defence Science and Technology Organisation (DSTO). Signals used for demonstration purposes were provided by Mechanical Solutions Inc., NJ, USA, and were obtained under a research project funded by NYSERDA. NYSERDA has not reviewed the information contained herein and the opinions expressed in this chapter do not necessarily reflect those of NYSERDA or the State of New York.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2014 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Sawalhi, N., Randall, R.B. (2014). Gear Parameter Identification in Wind Turbines Using Diagnostic Analysis of Gearbox Vibration Signals. In: Dalpiaz, G., et al. Advances in Condition Monitoring of Machinery in Non-Stationary Operations. Lecture Notes in Mechanical Engineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-39348-8_23
Download citation
DOI: https://doi.org/10.1007/978-3-642-39348-8_23
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-39347-1
Online ISBN: 978-3-642-39348-8
eBook Packages: EngineeringEngineering (R0)