基于角域加窗同步平均的太阳轮故障检测方法  

Fault detection method of a sun gear based on windowed synchronous average in angle domain

作　　者：王志乐[1] 郭瑜[1] 曹永立 伍星[1] 

机构地区：[1]昆明理工大学云南省高校振动与噪声重点实验室,昆明650500 [2]昆明云内动力股份有限公司,昆明650224

出　　处：《振动与冲击》2017年第13期74-79,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(51365023;51675251);云南省教育厅重大项目(ZD2013004)

摘　　要：行星齿轮箱广泛应用于风电机组等大型装备中,其振动特征提取在故障诊断领域有重要意义。但由于存在非平稳、调制、传递路径复杂、传递路径具有时变特性等特点,常规定轴齿轮箱的同步平均技术不直接适用。在原有行星齿轮箱加窗时域平均方法基础上提出一种适合时变传递路径及变速工况的角域加窗同步平均技术,从中提取有用信号同时降低传输路径的影响。由计算阶比跟踪对时域加窗振动信号进行等角度重采样,转换为角域准平稳信号,然后进行同步平均。将该方法对行星齿轮箱故障实测振动信号进行了分析,实验结果表明,所提出方法能够有效地提取行星齿轮箱太阳轮故障的特征信息。Planetary gearboxes are widely used in wind turbines and other large type machineries. Their vibration feature extraction is particularly important in fault diagnosis field. Due to non-stationary, modulation, and complextransmission path and its time-varying characteristics, the synchronous averaging （ SA） technique for conventional fixed- shaft gearbox fault detection is not directly applicable for planetary gearboxes. Here, based on the original windowed synchronous averaging method in time domain, the windowed synchronous averaging method in angle domain was proposed for planetary gearboxes with time-varying transmission paths and varying-speed working conditions. It was employed to extract the desired signals and reduce effects of transmission paths. Using this method, according to computed order tracking （ COT） , windowed signals in time domain were sampled with constant angle increments, the non-stationary signals in time-domain were converted into the quasi-stationary ones in angle domain. Then, those signals in angle-domain were processed with the synchronous average SA method. Test results showed that the proposed method can effectivelyextract the feature information of a sun gear＇ s faults of a planetary gearbox.

关 键 词：行星齿轮箱 同步平均 计算阶比跟踪 齿轮故障 

分 类 号：TH133.33[机械工程—机械制造及自动化]