考虑时变激励的滚动轴承局部故障动力学建模

doi:10.7527/S1000-6893.2021.25176

故障诊断技术在航空航天领域中的应用专栏

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考虑时变激励的滚动轴承局部故障动力学建模

李昊泽¹, 贺雅¹, 冯坤², 江志农¹, 冯飞飞³

1. 北京化工大学发动机健康监控及网络化教育部重点实验室, 北京 100029;
2. 北京化工大学高端机械装备健康监控与自愈化北京市重点实验室, 北京 100029;
3. 国营川西机器厂, 成都 611900

收稿日期:2020-12-28 修回日期:2021-03-10 出版日期:2022-08-15 发布日期:2021-03-09
通讯作者: 贺雅,E-mail:heya1301@163.com E-mail:heya1301@163.com
基金资助:
国家重点研发计划(2017YFC0805702)

Dynamic modeling of rolling bearing local fault considering time-varying excitation

LI Haoze¹, HE Ya¹, FENG Kun², JIANG Zhinong¹, FENG Feifei³

1. Key Laboratory of Engine Health Monitoring-Control and Networking of Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China;
2. Beijing Key Laboratory of Health Monitoring and Self-Recovery for High-end Mechanical Equipment, Beijing University of Chemical Technology, Beijing 100029, China;
3. State-owned Sichuan West Machine Factory, Chengdu 611900, China

Received:2020-12-28 Revised:2021-03-10 Online:2022-08-15 Published:2021-03-09
Supported by:
National Key Research and Development Program of China (2017YFC0805702)

摘要/Abstract

摘要： 滚动轴承局部故障的动力学建模是研究轴承故障机理的一种常用手段,其中滚动体经过故障区域时存在复杂的接触过程,因而局部故障激励函数的准确性直接影响整个动力学模型的准确性。然而由于局部故障激励与轴承故障尺寸、轴承转速等条件相关,现有的单一简化激励函数难以准确反映滚动体与故障的实际接触情况。因此,以轴承外圈故障为研究对象,首先,详细分析了滚动体经过故障区域时的接触间隙变化,建立了与滚动体相对位置相关的时变位移激励函数。然后,根据滚动体与故障边缘接触产生的撞击力作用,提出了一种虑及故障尺寸和轴承转速的瞬时撞击力激励函数。在刚性套圈假设和Hertz接触理论的指导下,基于上述激励函数建立了圆柱滚子轴承外圈局部故障的动力学模型,并利用实测信号验证了本文所建立模型的准确性。最后,利用该动力学模型分析研究了故障尺寸对一维及多维轴承振动特征的影响规律,以指导实际应用中滚动轴承的状态评估。

关键词: 滚动轴承, 局部故障, 时变激励, 撞击力, 动力学模型

Abstract: Establishing a dynamic model of rolling bearing local fault is a common method to study the mechanism of rolling bearing fault. There are complex contact processes when rolling elements pass through the fault area. The accuracy of the local fault excitation function directly affects the accuracy of the entire dynamic model. However, because local fault excitation is related to the bearing fault size, bearing speed and other conditions, the existing single simplified excitation function cannot accurately reflect the actual contact between the rolling element and the fault. Therefore, this article investigates the bearing outer ring fault. First, the change of contact gap of the rolling element passing through the fault area is analyzed, and the time-varying displacement excitation function related to the relative position of rolling element is established. Then, according to the impact force generated by the contact between the rolling element and the fault edge, an instantaneous impact force excitation function that takes into account the size of the fault and bearing speed is proposed. Under the guidance of the rigid ring hypothesis and Hertz contact theory, a dynamic model for the local fault of cylindrical roller bearing outer ring is established based on the above excitation function. The accuracy of the model is verified by the measured signal. Finally, the model is used to analyze the influence of fault size on vibration characteristics of one-and multi-dimensional bearings, thereby providing some guidance for state evaluation of rolling bearings in practical application.

Key words: rolling bearing, local fault, time-varying excitation, impact force, dynamic model

中图分类号:

李昊泽, 贺雅, 冯坤, 江志农, 冯飞飞. 考虑时变激励的滚动轴承局部故障动力学建模[J]. 航空学报, 2022, 43(8): 625176.

LI Haoze, HE Ya, FENG Kun, JIANG Zhinong, FENG Feifei. Dynamic modeling of rolling bearing local fault considering time-varying excitation[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(8): 625176.

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

考虑时变激励的滚动轴承局部故障动力学建模

Dynamic modeling of rolling bearing local fault considering time-varying excitation

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