时频脊融合方法及时变工况行星齿轮箱故障识别

发布时间：2018-03-24 10:11

本文选题：故障诊断　切入点：行星齿轮箱　出处：《振动工程学报》2017年01期

【摘要】：行星齿轮箱的瞬时频率(转速)精确提取是行星齿轮箱时变运行工况下故障诊断的关键。现有一些时频脊提取算法在提取瞬时频率时受到振动信号幅值变化以及时频变换结果中噪声成分的干扰,存在鲁棒性问题。为了解决这一问题,提出了一种双向搜索时频脊融合方法,并且将其进一步推广到多时频脊融合的概念中。然后,应用提出方法提取实际工程中时变工况行星齿轮箱高速轴的瞬时转速。再通过与现有两种方法对比以及阶次分析,验证了时频脊融合方法提取高速轴转速的可靠性与准确性。最后,在行星齿轮箱转速提取的基础上,利用阶次分析以及推导出的行星轮轴承故障频率的计算式,识别出了行星齿轮箱中的行星轮轴承内圈存在故障。
[Abstract]:The accurate extraction of instantaneous frequency (rotational speed) of planetary gearbox is the key to fault diagnosis of planetary gearbox under time-varying operating conditions. Some existing time-frequency ridge extraction algorithms are subjected to vibration signal amplitude variation when extracting instantaneous frequency. Interference of noise components in time-frequency transform results, In order to solve this problem, a bidirectional search method for time-frequency ridge fusion is proposed, which is further extended to the concept of multi-time ridge fusion. Using the proposed method to extract the instantaneous speed of the high-speed shaft of the planetary gearbox with time-varying working conditions in practical engineering, the method is compared with the existing two methods and the order of the method is analyzed. The reliability and accuracy of the time-frequency ridge fusion method for extracting the rotational speed of high-speed shaft are verified. Finally, based on the speed extraction of the planetary gearbox, the fault frequency of the planetary gear bearing is calculated by using the order analysis and the derived formula. The faults in the inner ring of the planetary gear bearing are identified.
【作者单位】：南京航空航天大学能源与动力学院;苏州大学城市轨道交通学院;
【基金】：国家自然科学基金资助项目(51675262,51605319) 机械结构强度与振动国家重点实验室开放课题(SV2015-KF-01)
【分类号】：TH132.41

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