ALL libraries (COBIB.SI union bibliographic/catalogue database)
  • Methods for detecting faults and damages in gear units
    Belšak, Aleš, 1968- ; Flašker, Jože
    There are many typical damages and faults related to gear unit operation. A crack in the tooth root, which often results in failure of gear unit operation, is the least desirable among them. Methods ... for detecting faults and damages presented in this article are based on gear units with real damages or faults, which have been formed by means of numerical simulations of real operating conditions; a laboratory test plant has been used. A possible fault or damage can be detected by monitoring vibrations. The influences of various defects of a single-stage gear unit upon the vibrations they produce are dealt with. A fatigue crack in the tooth root is related to significant changes in tooth stiffness; in concern to other faults, changes of other dynamic parameters are more expressed. Time signals obtained by experiments have been analysed by means of different methods. Amplitudes of time signal vibration are, by frequency analysis, presented primarily as a function of frequencies in a spectrum using hybrid procedure for determining the level of non-stationarity of operating conditions, above all, of rotational frequency. Signal analysis has been performed also in relation to a non-stationary signal, by means of 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 indicate the presence of faults or damages very reliably.
    Type of material - conference contribution
    Publish date - 2006
    Language - english
    COBISS.SI-ID - 10542870