| 引用本文: | 王凯,剡昌锋,王风涛,常斌全,吴黎晓.深沟球轴承复合故障动力学特征[J].哈尔滨工业大学学报,2020,52(1):133.DOI:10.11918/201809184 |
| WANG Kai,YAN Changfeng,WANG Fengtao,CHANG Binquan,WU Lixiao.Dynamic characteristics of compound fault in deep groove ball bearing[J].Journal of Harbin Institute of Technology,2020,52(1):133.DOI:10.11918/201809184 |
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| 摘要: |
| 为提高状态监测水平,诊断和识别轴承的早期故障,降低因轴承故障导致的损失, 针对径向载荷作用下复合故障激励的滚动轴承振动机理的复杂性问题,基于Hertz接触理论,考虑复合故障、轴和轴承座与轴承之间的耦合激励、时变位移激励和滚动体滑动等因素,提出了4自由度复合故障深沟球轴承动力学模型. 模型描述了滚动体在滚道表面上的接触和运动,探究了轴承表面复合故障激励机理,分析了3种工况条件下滚动轴承复合故障对系统动力学振动响应的影响,为轴承状态监测和诊断提供了理论依据. 实验和模拟研究结果表明,复合故障的振动响应是由内、外圈单故障的振动响应耦合作用的结果,在频谱图中可以明显地分辨出内、外圈故障特征频率及倍频成分,与单故障相比较,其对应的幅值增大. 缺陷尺寸增大、转速增高和载荷增强均会使复合故障轴承的振动幅值增大,影响其运行状态,进而加速轴承的失效,降低轴承的使用寿命. |
| 关键词: 复合故障 动力学模型 深沟球轴承 时变位移激励 滑动 |
| DOI：10.11918/201809184 |
| 分类号:TH133.3 |
| 文献标识码:A |
| 基金项目:国家自然科学基金项目(51765034) |
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| Dynamic characteristics of compound fault in deep groove ball bearing |
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WANG Kai1,YAN Changfeng1,WANG Fengtao2,CHANG Binquan3,WU Lixiao1
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(1. School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; 2. School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China; 3.Sunny Optical Technology CO., LTD, Noingbo 315400, Zhejiang, China)
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| Abstract: |
| Aiming at the complexity of the vibration mechanism of rolling bearing induced by compound fault under radial load, based on Hertz contact theory, a 4-DOF dynamic model of deep groove ball bearing with compound fault is proposed by considering compound fault, coupled excitation between the shaft and the bearing housing and the bearing, time-varying displacement excitation and rolling element sliding. The model describes the contact and movement of rolling element on the raceway surface, explores the compound fault excitation mechanism of the bearing, and analyzes the influence of rolling bearing compound fault on the system dynamic vibration response under three kinds of working conditions, which provides a theoretical basis for bearing condition monitoring and diagnose. The experimental and simulation results show that the vibration response of the compound fault is the result of the coupling of vibration response of single fault on the inner and outer ring. The fault characteristic frequency and multiple frequency components of the inner and outer ring can be clearly distinguished in the spectrum. Compared with a single fault, the vibration amplitude of the compound fault is higher than that of the single fault. The increasing of size, speed and load will increase the vibration amplitude of the bearing with compound fault and affect its operating state, which will accelerate the failure and reduce the service life of bearing. |
| Key words: compound fault dynamic model deep groove ball bearing time-varying displacement excitation slipping |
