中介轴承故障动力学建模与振动特征分析

doi:10.3901/JME.2020.21.089

机械工程学报 ›› 2020, Vol. 56 ›› Issue (21): 89-99.doi: 10.3901/JME.2020.21.089

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中介轴承故障动力学建模与振动特征分析

曹宏瑞^1,2, 景新¹, 苏帅鸣¹, 陈雪峰^1,2

1. 西安交通大学航空发动机研究所西安 710049;
2. 西安交通大学机械制造系统国家重点实验室西安 710049

收稿日期:2019-11-21 修回日期:2020-06-29 出版日期:2020-11-05 发布日期:2020-12-19
作者简介:曹宏瑞(通信作者),男,1982年出生,博士,教授,博士研究生导师。主要研究方向为航空发动机转子系统动力学分析与故障诊断。E-mail:chr@mail.xjtu.edu.cn 景新,男,1994年出生,硕士研究生。主要研究方向为轴承故障动力学。E-mail:xnjingxin@163.com 苏帅鸣,男,1996年出生,硕士研究生。主要研究方向为基于数字孪生的滚动轴承故障诊断与寿命预测。E-mail:susm1996@stu.xjtu.edu.cn 陈雪峰,男,1975年出生,博士,教授,博士研究生导师。主要研究方向为机械动态分析与监测诊断。E-mail:chenxf@mail.xjtu.edu.cn
基金资助:
装备预研领域基金(61400030601)和国家自然科学基金(51922084)资助项目。

Dynamic Modeling and Vibration Analysis for Inter-shaft Bearing Fault

CAO Hongrui^1,2, JING Xin¹, SU Shuaiming¹, CHEN Xuefeng^1,2

1. Aero-engine Institute, Xi'an Jiaotong University, Xi'an 710049;
2. State Key Laboratory of Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049

Received:2019-11-21 Revised:2020-06-29 Online:2020-11-05 Published:2020-12-19

摘要/Abstract

摘要： 中介轴承是航空发动机转子的关键支承部件之一,工作转速高,润滑条件差,易发生故障。基于动力学模型的故障机理研究可以为中介轴承故障诊断提供依据。以Gupta圆柱滚子轴承复杂动力学建模方法为基础,考虑外圈的运动建立了中介轴承动力学模型,通过试验对模型进行验证。在此基础上,分别考虑滚道表面形貌和轴承间隙的变化,建立中介轴承磨损故障动力学模型;针对中介轴承滚道表面剥落等局部损伤故障,考虑滚动体通过损伤区域时趋近量和接触载荷方向的改变,建立中介轴承局部损伤故障动力学模型。利用所建故障动力学模型对不同磨损状态下中介轴承外圈径向振动响应进行研究。研究表明,出现磨损后,振动响应频率中出现若干随机成分;对于局部损伤和磨损的复合故障,随着磨损加剧,振动幅值随之增大,随机成分所占比重增加,损伤的故障特征不明显。

关键词: 中介轴承, 故障机理, 动力学建模, 振动响应

Abstract: Inter-shaft bearings is one of the key supporting components of aero-engine rotor. The inter-shaft bearings is prone to failure because of the high speed and poor lubrication working conditions. Dynamic model based fault mechanism analysis can provide guidance for fault diagnosis of bearings. A dynamic model for inter-shaft bearings is proposed based on Gupta's model with considering the movement of the outer ring. And the model is validated by experiments. Based on that, a faulty dynamic model of wear is proposed with considering the change of surface morphology of raceway and bearing clearance. Besides, a faulty dynamic model of localized defects is proposed by considering the change of the geometrical interaction and the direction of contact force. Then the vibration responses of inter-shaft bearing under different wear conditions are analyzed by this model. The results show that many random components appear in the vibration response for bearings with wear faults. For the bearing with compound faults as localized defect and wear, as wear goes more serious, the amplitude of vibration response becomes lager; the random components increase. The fault characteristics are not obvious.

Key words: inter-shaft bearing, fault mechanism, dynamic modeling, vibration response

中图分类号:

TH133

曹宏瑞, 景新, 苏帅鸣, 陈雪峰. 中介轴承故障动力学建模与振动特征分析[J]. 机械工程学报, 2020, 56(21): 89-99.

CAO Hongrui, JING Xin, SU Shuaiming, CHEN Xuefeng. Dynamic Modeling and Vibration Analysis for Inter-shaft Bearing Fault[J]. Journal of Mechanical Engineering, 2020, 56(21): 89-99.

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中介轴承故障动力学建模与振动特征分析

Dynamic Modeling and Vibration Analysis for Inter-shaft Bearing Fault

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