This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Using Fourier Analysis and Theoretical Equation to Predict Bearing Raceway Waviness
Technical Paper
2021-01-1036
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Large size bearing’s raceway waviness is a most common NVH issue that presenting
in manufactured bearing. Unlike small or medium size bearing with its raceway
been honed after grinding. Typically, for large size bearing’s raceway are not
honed due to its size limitation, unless there are special requirements from
customers. Hence, it will inevitably generate great number of waves on the
raceway circumference, which lead to a significant source excitation to the
system. Although great amount of experiments substantiated that bearing waviness
will not affect bearing life. However, annoyance noise is the main reason that
customer reject bearings for quality concern. Hence, at the early stage of
identifying raceway waviness issue at customer site could prevent from economic
loss. Generally, the energy level caused by large size bearing waviness could be
distinctive. Testing engineer will capture time domain vibration data by using
radial accelerometer cells mounted on the housing for bearing health assessment.
Then the vibration frequency spectrum can be converted by using Fast Fourier
Transformation method. But, the preliminary step of using FFT is that people
should know exact wave numbers on raceway circumference in order to trace back
waviness excitation frequency. In this paper, a theoretical equation is
developed, combining with common Fourier Analysis method. pinpoint raceway wave
numbers in a fast and direct way become reality. A case example of CRB been used
in a 5.5MW wind turbine generator and its NVH data will be analyzed for waviness
equation prediction. Finally, the problematic bearing is also checked by
waviness analyzer to confirm exact wave numbers on raceway circumference.
Recommended Content
Authors
Citation
Chen, G., Dalen, P., Nijen, G., and Wu, Z., "Using Fourier Analysis and Theoretical Equation to Predict Bearing Raceway Waviness," SAE Technical Paper 2021-01-1036, 2021, https://doi.org/10.4271/2021-01-1036.Also In
References
- van Nijen , G. and van Dalen , P.
- Brandt , A. Noise and Vibration Analysis: Signal Analysis and Experimental Procedures John Wiley 1st edition 978-0470746448
- Kotzalas , M. and Harris , T. Rolling Bearing Analysis Fifth edition 2006 978-0849381676
- Chen , H. and Herrin , D. A Parametric Investigation of Louvered Terminations for Rectangular Ducts SAE Int. J. Passeng. Cars - Mech. Syst. 8 3 2015 10.4271/2015-01-2356
- Gieras , J. , Wang , C. and Lai , J. Noise of Polyphase Electric Motors CRC Press, Taylor & Francis 2006 978-0-8247-2381-1
- Brigham , E.O. and Morrow , R.E. The Fast Fourier Transform IEEE Spectrum 4 12 Dec. 1967 63 70 10.1109/MSPEC.1967.5217220
- Glassman , J.A. A Generalization of the Fast Fourier Transform IEEE Transactions on Computers C-19 2 Feb. 1970 105 116 10.1109/T-C.1970.222875