UNDERSTANDING VIBRATION PROPERTIES OF A PLANETARY GEAR SET FOR FAULT DETECTION

  • By Ken Keith
  • one year ago
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This paper investigates the vibration properties of a planetary gear set in a dynamic view. An improved two-dimensional lumped mass model is used to simulate the vibration signals of a planetary gear set in the sound or crack situation. Through dynamic simulation, the vibration signals of each individual component are obtained, such as the acceleration of the sun gear, planet gear. By incorporating the effect of the transmission path, resultant vibration signals of the gearbox at the sensor location are acquired. Results show obvious fault symptoms in the signals of the individual components. After going through the transmission path, the fault symptom attenuates and reveals new patterns. A bigger increase of the signal energy in some mesh periods is observed when the crack tooth is in meshing. Based on this finding, one indicator is proposed to detect the crack fault. The performance of this indicator is experimentally validated.