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Vibration analysis of a planetary gear with the flexible ring and planet bearing fault
Measurement ( IF 5.6 ) Pub Date : 2020-07-03 , DOI: 10.1016/j.measurement.2020.108100
Jing Liu , Ruikun Pang , Shizhao Ding , Xinbin Li

Vibration performances of planetary gears are greatly affected by the flexible ring gear and planet bearing faults. However, the previous works only considered single flexible ring gear, rigid planetary gear system or planet bearing fault in their models. To overcome this problem, a flexible-rigid coupling dynamic (FMBD) model for a planetary gear is presented. Both the flexible ring gear, flexible supports of the ring gear and sun gear, and a rectangular local fault in the planet bearing are formulated in the presented FMBD model. The time-varying impulse force caused by the fault is described by a half-sine profile. Effects of the fault width, moment, and input speed on the time- and frequency-domain responses of the planetary gear are analyzed. To validate the presented FMBD model, the results from the FMBD model are compared with those from the experiment in the listed work. Note that the time- and frequency-domain responses from the flexible-rigid and rigid models are very different. Thus, the flexible ring gear should be formulated in the dynamic models of planetary gear, as well as the flexible supports of the ring gear and sun gear. The presented results can give some guidance for fault detection methods of planet bearings.



中文翻译:

具有挠性环和行星轴承故障的行星齿轮的振动分析

柔性齿圈和行星轴承故障极大地影响了行星齿轮的振动性能。但是,先前的工作在模型中仅考虑了单个挠性齿圈,刚性行星齿轮系统或行星轴承故障。为了克服这个问题,提出了一种用于行星齿轮的柔性-刚性耦合动力学(FMBD)模型。所提出的FMBD模型中既制定了挠性齿圈,齿圈和太阳轮的挠性支撑件,又规定了行星轴承中的矩形局部故障。由故障引起的时变脉冲力用半正弦曲线描述。分析了故障宽度,力矩和输入速度对行星齿轮的时域和频域响应的影响。为了验证提出的FMBD模型,FMBD模型的结果与所列工作中的实验结果进行了比较。请注意,刚柔和刚度模型的时域和频域响应非常不同。因此,应该在行星齿轮的动力学模型以及齿圈和太阳轮的柔性支撑件中制定挠性齿圈。研究结果可以为行星轴承的故障检测方法提供一定的指导。

更新日期:2020-07-03
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