EFFECT OF THE UNCERTAIN ANGULAR MISALIGNMENT ON FATIGUE LIFE OF ANGULAR CONTACT BALL BEARINGS OF SPINDLE SYSTEM

ZHANG MengQi; DU DongXu; XIE LiYang; ZHANG Yu

doi:10.16579/j.issn.1001.9669.2021.03.032

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EFFECT OF THE UNCERTAIN ANGULAR MISALIGNMENT ON FATIGUE LIFE OF ANGULAR CONTACT BALL BEARINGS OF SPINDLE SYSTEM

更新时间：2022-09-22

- EFFECT OF THE UNCERTAIN ANGULAR MISALIGNMENT ON FATIGUE LIFE OF ANGULAR CONTACT BALL BEARINGS OF SPINDLE SYSTEM
- Journal of Mechanical Strength Vol. 43, Issue 3, Pages: 731-741(2021)
- 作者机构：
  
  1. 东北大学机械工程与自动化学院
  2. 东北大学航空动力装备振动与控制教育部重点实验室
  3. 沈阳建筑大学机械工程学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2021.03.032
  CLC：
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ZHANG MengQi, DU DongXu, XIE LiYang, et al. EFFECT OF THE UNCERTAIN ANGULAR MISALIGNMENT ON FATIGUE LIFE OF ANGULAR CONTACT BALL BEARINGS OF SPINDLE SYSTEM. [J]. 43(3):731-741(2021)
DOI：

ZHANG MengQi, DU DongXu, XIE LiYang, et al. EFFECT OF THE UNCERTAIN ANGULAR MISALIGNMENT ON FATIGUE LIFE OF ANGULAR CONTACT BALL BEARINGS OF SPINDLE SYSTEM. [J]. 43(3):731-741(2021) DOI： 10.16579/j.issn.1001.9669.2021.03.032.

摘要

研究在非理想安装条件下,轴承角偏移对主轴系统中轴承疲劳寿命的影响。为实现这一目的,首先介绍多轴承-主轴系统的分析模型,提出多自由度系统模型的求解方法,并对系统模型的有效性进行验证;其次,以四轴承-主轴系统为研究对象,考虑角偏移的不确定性,假设角偏移符合正态分布,基于系统模型分析不同主轴转速条件下,不同角偏移值时轴承内滚动体的接触力分布;最后,基于寿命理论,计算各轴承的疲劳寿命。结果表明:角偏移的不确定性可导致轴承寿命的显著分散性;对于系统中的预紧轴承,无角偏移时的疲劳寿命是角偏移存在条件下疲劳寿命的上限。随着主轴转速的降低,无角偏移时的轴承寿命与存在角偏移时的轴承寿命最小值的差异变得更大。

Abstract

The effect of angle misalignment of bearing on bearing fatigue life in spindle system with non-ideal installation conditions was studied in this paper. For achieving this,firstly,the analysis model of multiple bearings-spindle system was introduced. The solution method for multi-degree-of-freedom system model was proposed,and the validity of the model was verified. In addition,taking the four bearings-spindle system as the research object,the uncertain angular misalignment was considered and the angular misalignment was assumed to be normal distribution. Based on the system model,the contact force distribution of balls of bearing was analyzed under different spindle speeds and angular misalignment. Finally,the fatigue life of each bearing was calculated by the life theory. The results show that the uncertain angular misalignment can lead to significant dispersion of bearing life. For the preloaded bearing of system,the fatigue life without angular misalignment is the upper limit of that with angular misalignment. With the decrease of spindle speed,the bearing life without angular misalignment is significantly greater than the minimum bearing life with angular misalignment.

关键词

角偏移角接触球轴承多轴承-主轴系统疲劳寿命

Keywords

Angular misalignmentAngular contact ball bearingMultiple bearings-spindle systemFatigue life

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