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Effect of static and dynamic misalignment of rolling bearing on nonlinear vibration characteristics of rotor system

滚动轴承静态和动态不对中对转子系统非线性振动特性的影响

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Abstract

In the research on rolling bearing misalignment, the influence of bearing misalignment on the vibration characteristics of the rotor system is rarely considered, especially for the dynamic bearing misalignment. Based on the limitations of the existing research, a five-degree of freedom (5-DOF) nonlinear force model considering bearing misalignment is proposed firstly. The model comprehensively considers the parallel and angular misalignment, static and dynamic misalignment, inner ring and outer ring misalignment. Secondly, the effects of misalignment on the dynamic contact characteristics of bearing and the vibration characteristics of the rotor system are analyzed. Then, based on the dynamic response, the evaluation indexes of bearing misalignment are given. Finally, the similarities and differences between parallel and angular misalignment, static and dynamic misalignment are compared. The results show that the bearing misalignment increases the resonance speed of the rotor, and the amplitude jum** phenomenon appears in the resonance region, showing the characteristics of hardening-type nonlinearity. In terms of frequency characteristics, dynamic parallel misalignment and dynamic angular misalignment increase the amplitude of frequency components fr and 2fr, respectively. The research can be used as a theoretical basis and valuable reference for fault identification of the rotor-bearing system.

摘要

在滚动轴承不对中问题的研究中, 以往的研究中很少考虑轴承不对中对转子系统振动特性的影响。基于现有研究的局限性, 首先, 给出了一种考虑轴承不对中的5 自由度非线性力模型, 该模型综合考虑了轴承的**行和角不对中、静态与动态不对中、内圈与外圈不对中等多种情况。其次, 将该模型应用在转子有限元模型中, 分析了不对中对轴承动态接触特性和转子系统振动特性的影响。然后, 给出了衡量轴承不对中程度的评价指标。最后, 对比分析了**行和角不对中、静态与动态不对中的异同点。结果表明, 轴承不对中提高了转子的共振转速, 在共振区出现了幅值跳跃现象, 表现出硬式非线性特征。从频率特征上来看, 滚动轴承动态**行不对中和动态角不对中分别导致转子旋转频率成分fr和2fr的幅值增大。动态不对中导致轴承的承载区随着轴承内圈的旋转而时刻变化。该研究可为转子-轴承系统的故障识别提供理论依据和有价值的参考。

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Authors and Affiliations

  1. School of Mechanical Engineering and Automation, Northeastern University, Shenyang, 110819, China

    Peng-fei Wang  (王鹏飞), Hong-yang Xu  (徐宏阳), Hui Ma  (马辉), Qing-kai Han  (**清凯), Zhong Luo  (罗忠) & Bang-chun Wen  (闻邦椿)

  2. China North Vehicle Research Institute, Bei**g, 100072, China

    Yang Yang  (杨阳)

  3. Key Laboratory of Vibration and Control of Aero-Propulsion System of Ministry of Education (Northeastern University), Shenyang, 110819, China

    Hui Ma  (马辉)

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  1. Peng-fei Wang  (王鹏飞)
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Correspondence to Hui Ma  (马辉).

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Contributors

WANG Peng-fei established the models and edited the draft of manuscript. YANG Yang, XU Hong-yang and MA Hui edited the manuscript. MA Hui, HAN Qing-kai, LUO Zhong and WEN Bang-chun developed the overarching research goals and provided technical guidance.

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Project(20195208003) supported by the Basic Research, China

Conflict of interest

WANG Peng-fei, YANG Yang, XU Hong-yang, MA Hui, HAN Qing-kai, LUO Zhong and WEN Bang-chun declare that they have no conflict of interest.

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Wang, Pf., Yang, Y., Xu, Hy. et al. Effect of static and dynamic misalignment of rolling bearing on nonlinear vibration characteristics of rotor system. J. Cent. South Univ. 30, 871–903 (2023). https://doi.org/10.1007/s11771-023-5268-x

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