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  • Damage identification in gears [Elektronski vir]
    Belšak, Aleš, 1968- ; Flašker, Jože
    A crack in the tooth root is the least desirable damage caused to gear units; it often results in failure of gear unit operation. There are of course other typical damages and faults that can cause ... problems related to gear unit operation. Fault analyses presented in this article are based on gear units with real damages or faults, which have been formed with the aid of numerical simulations of real operating conditions; a laboratory test plant has been used. By monitoring vibrations, a possible damage can be identified. The influences of a crack in a single-stage gear unit upon the produced vibrations are presented. Significant changes in tooth stiffness are caused by a fatigue crack in the tooth root; in relation to other faults, changes of other dynamic parameters are more expressed. Different methods are applied to analyse time signals obtained by experiments. Amplitudes of time signal vibration are, by frequency analysis, presented above all as a function of frequencies in spectrum using hybrid procedure for determining the level of non-stationarity of operating conditions primarily of rotational frequency. Signal analysis has been carried out also in relation to a non-stationary signal, using the family of Time Frequency Analysis tools such as Wavelets and Joint Time Frequency Analyses. Typical spectrogram and scalogram patters resulting from reactions to faults or damages are a very reliable indication of the presence of faults or damages.
    Vir: Eurodyn 2008, 7-9 July 2008, University of Southampton, Southampton, United Kingdom [Elektronski vir] (10 str. (E294))
    Vrsta gradiva - prispevek na konferenci
    Leto - 2008
    Jezik - angleški
    COBISS.SI-ID - 12421142

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