Torsional vibration signal analysis as a diagnostic tool for planetary gear fault detection
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This paper aims to investigate the effectiveness of using the torsional vibration signal as a diagnostic tool for planetary gearbox faults detection. The traditional approach for condition monitoring of the planetary gear uses a stationary transducer mounted on the ring gear casing to measure all the vibration data when the planet gears pass by with the rotation of the carrier arm. However, the time variant vibration transfer paths between the stationary transducer and the rotating planet gear modulate the resultant vibration spectra and make it complex. Torsional vibration signals are theoretically free from this modulation effect and therefore, it is expected to be much easier and more effective to diagnose planetary gear faults using the fault diagnostic information extracted from the torsional vibration. In this paper, a 20 degree of freedom planetary gear lumped-parameter model was developed to obtain the gear dynamic response. In the model, the gear mesh stiffness variations are the main internal vibration generation mechanism and the finite element models were developed for calculation of the sun-planet and ring-planet gear mesh stiffnesses. Gear faults on different components were created in the finite element models to calculate the resultant gear mesh stiffnesses, which were incorporated into the planetary gear model later on to obtain the faulted vibration signal. Some advanced signal processing techniques were utilized to analyses the fault diagnostic results from the torsional vibration. It was found that the planetary gear torsional vibration not only successfully detected the gear fault, but also had the potential to indicate the location of the gear fault. As a result, the planetary gear torsional vibration can be considered an effective alternative approach for planetary gear condition monitoring.
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Xue, S.; Howard, Ian ; Wang, C.; Bao, H.; Lian, P.; Chen, G.; Wang, Y.; Yan, Y. (2019)© 2019 Elsevier Ltd This paper aims to investigate the effectiveness of using the torsional vibration signal as a diagnostic tool for planet bearing fault detection. The inner race of the planet bearing is connected to ...
Xue, S.; Wang, C.; Howard, Ian ; Lian, P.; Chen, G.; Wang, Y.; Yan, Y.; Xu, Q.; Shi, Y.; Jia, Y.; Zheng, Y.; Wang, N. (2020)© 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 ...
The Development of Lumped Mass Dynamic Modeling Methods of Planetary Gearbox for Fault Detection and DiagnosisWang, Zhongwei; Howard, Ian (2010)This paper presents a 9+3*n+1 degree of freedom planetary gearbox lumped-parameter dynamic model including coupled torsional-transverse behaviour of all components. The model includes one sun gear, one ring gear, one ...