INTERFERENCE AND CONTACT ANALYSIS OF SELF-ALIGNING BEARING IN LARGE ROLLING MILL BASED ON A SIMPLIFIED MODEL

ZHANG AnKang; DONG QingBing; CHEN Zhuang; LI JinChao; HE Dong

doi:10.16579/j.issn.1001.9669.2022.05.022

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INTERFERENCE AND CONTACT ANALYSIS OF SELF-ALIGNING BEARING IN LARGE ROLLING MILL BASED ON A SIMPLIFIED MODEL

更新时间：2022-11-10

- INTERFERENCE AND CONTACT ANALYSIS OF SELF-ALIGNING BEARING IN LARGE ROLLING MILL BASED ON A SIMPLIFIED MODEL
- Journal of Mechanical Strength Vol. 44, Issue 5, Pages: 1170-1178(2022)
- 作者机构：
  
  1. 重庆大学机械传动实验室
  2. 重庆大学机械与运载工程学院
  3. 重庆齿轮箱有限公司
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2022.05.022
  CLC：
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ZHANG AnKang, DONG QingBing, CHEN Zhuang, et al. INTERFERENCE AND CONTACT ANALYSIS OF SELF-ALIGNING BEARING IN LARGE ROLLING MILL BASED ON A SIMPLIFIED MODEL. [J]. 44(5):1170-1178(2022)
DOI：

ZHANG AnKang, DONG QingBing, CHEN Zhuang, et al. INTERFERENCE AND CONTACT ANALYSIS OF SELF-ALIGNING BEARING IN LARGE ROLLING MILL BASED ON A SIMPLIFIED MODEL. [J]. 44(5):1170-1178(2022) DOI： 10.16579/j.issn.1001.9669.2022.05.022.

摘要

轧机中的调心滚子轴承工况复杂，实际寿命经常达不到预期的设计寿命，因此研究调心滚子轴承的全局载荷分布与局部的应力分布具有重要意义。在分析轴承的接触载荷分布时，对接触区域的网格细化将增加有限元模型中单元数量，导致计算时间较长且不易收敛。首先，基于赫兹接触理论提出了一种新的简化的轴承有限元模型，简化后的模型可以明显地提高计算效率；然后，在考虑轴和轴承内圈过盈配合的基础上求解全局模型的滚子接触载荷分布；最后，将求出的最大接触载荷对应的位移作为局部模型的边界条件，求解内圈的应力分布。结果表明不同工况下两列滚道承受载荷的比例是变化的，滚子接触载荷分布也是变化的。过盈配合使得内圈的最小Mises应力大于40 MPa,这将会降低轴承的强度和疲劳寿命。

Abstract

The working conditions of self-aligning bearings in rolling mills are complex. The actual life of the bearing often does not reach the design life as expected. Therefore, it is of great significance to study the global load distribution and local stress distribution of self-aligning roller bearing. The global model involving contact of a number of elements often results in a long calculation time and convergence difficulty. Firstly, proposes a new simplified finite element model of bearing based on Hertz contact theory, which can greatly improve the calculation efficiency. Then, the roller contact loading distribution of the global model is solved based on the interference fit amount of the shaft and the inner ring of the bearing. Finally, the displacements corresponding to the maximum contact load is used as the boundary conditions of the local model, and the stress distribution of the inner ring is solved. The results show that the loading ratio of the two rows of raceways and loading distribution of the contact are varied with working conditions. The interference fit amount specified in the present study makes the minimum Mises stress of the inner ring greater than 40 MPa. This will reduce the strength and fatigue life of the bearing.

关键词

轧机调心滚子轴承模型简化载荷分布过盈配合

Keywords

Rolling millSelf-aligning roller bearingModel simplificationLoading distributionInterference fit

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