行星齿轮箱启动、停止和负载发生变化时,转速会发生变化并使得行星齿轮箱的振动信号具有明显的非平稳特性。行星齿轮箱复杂的结构特征导致了振动信号的复杂性,使得常规的频谱和解调分析方法难以识别时变工况下的行星齿轮箱故障特征频率。本文在行星齿轮箱故障特征频率的基础上,考虑转速变化特征,总结了行星齿轮箱太阳轮、行星轮及齿圈的故障阶次特征表。通过对行星齿轮箱变转速工况下太阳轮故障实验信号的阶次分析,实现了变转速情况下行星齿轮箱太阳轮故障诊断,并与传统的频域信号分析方法比较,体现了阶次分析技术在行星齿轮箱变工况故障诊断过程中的优势。
Abstract
Planetary gearbox starts, stops and load changes may cause variations of rotational speed. Frequency modulation or non-stationarity of resultant vibration signals from planetary gear system are, therefore, rendered. Characteristic vibration featuresfrom planetary gearbox is complex due to the complexity of structures. The combination of non-stationary vibration signals as well as complex characteristic vibration features bring tremendous difficulties for planetary gear system fault diagnostics. In this paper, Order tracking method is introduced to planetary sun gear fault detection under speed variation conditions, theoretically characteristic orders to speed-varying planetary gearbox are summarized. Comparisons between traditional frequency domain methods with order tracking method are made experimentally. The results shows that order tracking method are effective in fault diagnostics under speed varying conditions of planetary gearbox.
关键词
阶次分析 /
行星齿轮箱 /
非平稳 /
故障诊断
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Key words
order tracking /
planetary gearbox /
nonstationary /
fault diagnosis
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参考文献
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