Vibration response mechanism of faulty outer race rolling element bearings for quantitative analysis
Vibration response mechanism of faulty outer race rolling element bearings for quantitative analysis
复制标题
故障外圈滚动轴承振动响应机制的定量分析
DOI：
10.1016/j.jsv.2015.10.015
复制
发表时间：
2016-03-03
影响因子：
4.7
通讯作者：
Lee, Seungchul
中科院分区：
文献类型：
--
作者：
Cui, Lingli;Zhang, Yu;Lee, Seungchul
为了实现滚动轴承故障的定量诊断，建立了滚动轴承故障严重度评估的非线性振动模型。将外圈缺陷尺寸参数引入动力学模型，仿真了不同故障尺寸下滚动轴承的振动响应信号。对信号进行了定量分析，以观察振动响应与故障大小之间的关系。当球滚到缺陷上和远离缺陷时的撞击点由振动响应信号识别。其次，从两个冲击点之间的时间间隔获得反映滚动轴承故障严重程度的冲击特征。当轴承故障宽度较小时，信号表现为清晰的单次冲击。随着缺陷尺寸的增大，信号逐渐变为双冲击。在滚动轴承试验台上测量了不同外圈故障尺寸下的振动信号。实验结果与模拟结果吻合较好。这些结果有助于了解滚动轴承在不同故障严重程度下的振动响应机理。(C)2015爱思唯尔有限公司版权所有。
For the quantitative fault diagnosis of rolling element bearings, a nonlinear vibration model for fault severity assessment of rolling element bearings is established in this study. The outer race defect size parameter is introduced into the dynamic model, and vibration response signals of rolling element bearings under different fault sizes are simulated. The signals are analyzed quantitatively to observe the relationship between vibration responses and fault sizes. The impact points when the ball rolls onto and away from the defect are identified from the vibration response signals. Next, the impact characteristic that reflects the fault severity in rolling element bearings is obtained from the time interval between two impact points. When the width of the bearing fault is small, the signals are presented as clear single impact. The signals gradually become double impacts with increasing size of defects. The vibration signals of a rolling element bearings test rig are measured for different outer race fault sizes. The experimental results agree well with the results from simulations. These results are useful for understanding the vibration response mechanism of rolling element bearings under various degrees of fault severity. (C) 2015 Elsevier Ltd. All rights reserved.