Vibration signal models for fault diagnosis of planet bearings

被引:71
作者
Feng, Zhipeng [1 ]
Ma, Haoqun [1 ]
Zuo, Ming J. [2 ,3 ]
机构
[1] Univ Sci & Technol Beijing, Sch Mech Engn, Beijing 100083, Peoples R China
[2] Univ Elect Sci & Technol China, Sch Mechatron Engn, Chengdu 611731, Sichuan, Peoples R China
[3] Univ Alberta, Dept Mech Engn, Edmonton, AB T6G 2G8, Canada
基金
加拿大自然科学与工程研究理事会; 中国国家自然科学基金;
关键词
planetary gearbox; planet bearing; fault diagnosis; vibration signal model; modulation; TIME-DOMAIN AVERAGES; SUN GEAR; GEARBOXES; DECOMPOSITION;
D O I
10.1016/j.jsv.2016.01.041
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
Rolling element bearings are key components of planetary gearboxes. Among them, the motion of planet bearings is very complex, encompassing spinning and revolution. Therefore, planet bearing vibrations are highly intricate and their fault characteristics are completely different from those of fixed-axis case, making planet bearing fault diagnosis a difficult topic. In order to address this issue, we derive the explicit equations for calculating the characteristic frequency of outer race, rolling element and inner race fault, considering the complex motion of planet bearings. We also develop the planet bearing vibration signal model for each fault case, considering the modulation effects of load zone passing, time-varying angle between the gear pair mesh and fault induced impact force, as well as the time-varying vibration transfer path. Based on the developed signal models, we derive the explicit equations of Fourier spectrum in each fault case, and summarize the vibration spectral characteristics respectively. The theoretical derivations are illustrated by numerical simulation, and further validated experimentally and all the three fault cases (i.e. outer race, rolling element and inner race localized fault) are diagnosed. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:372 / 393
页数:22
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