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    The diagnostic analysis of the fault coupling effects in planet bearing

    Access Status
    Fulltext not available
    Embargo Lift Date
    2021-11-09
    Authors
    Xue, S.
    Wang, C.
    Howard, Ian
    Lian, P.
    Chen, G.
    Wang, Y.
    Yan, Y.
    Xu, Q.
    Shi, Y.
    Jia, Y.
    Zheng, Y.
    Wang, N.
    Date
    2020
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Xue, S. and Wang, C. and Howard, I. and Lian, P. and Chen, G. and Wang, Y. and Yan, Y. et al. 2020. The diagnostic analysis of the fault coupling effects in planet bearing. Engineering Failure Analysis. 108: Article No. 104266.
    Source Title
    Engineering Failure Analysis
    DOI
    10.1016/j.engfailanal.2019.104266
    ISSN
    1350-6307
    Faculty
    Faculty of Science and Engineering
    School
    School of Civil and Mechanical Engineering
    URI
    http://hdl.handle.net/20.500.11937/80552
    Collection
    • Curtin Research Publications
    Abstract

    © 2019 Elsevier Ltd

    The purpose of this paper is to investigate the fault coupling effects in the planet bearing as well as the corresponding vibration signatures in the resultant vibration spectrum. In a planetary gear application, the planet bearing can not only spin around the planet gear axis, but also revolve about the sun gear axis and this rotating mechanism poses a big challenge for the diagnostic analysis of the planet bearing vibration spectrum. In addition, the frequency component interaction and overlap phenomenon in the vibration spectrum caused by the fault coupling effect can even worsen the diagnosis results. To further the understanding of the fault coupling effects in a planet bearing, a 34° of freedom planetary gear model with detailed planet bearing model was established to obtain the dynamic response in the presence of various bearing fault scenarios. The method of modelling the bearing distributed faults and localized faults has been introduced in this paper, which can be further incorporated into the planetary gear model to obtain the faulted vibration signal. The “benchmark” method has been adopted to enhance the planet bearing fault impulses in the vibration signals and in total, the amplitude demodulation results from 20 planet bearing fault scenarios have been investigated and analyzed. The coherence estimation over the vibration frequency domain has been proposed as a tool to quantify the fault impact contribution from different fault modes and the results suggested that the outer raceway fault contributes most to the resultant planet bearing vibration spectrum in all the investigated fault scenarios.

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