Stiffness Model of Rolling Bearing Considering Clearance and Analysis of Its Time-varying Characteristic

Runlin Chen; Qin Han; Menghao Zhang; Yanchao Zhang; Longlong Li; Yahui Cui

doi:10.16578/j.issn.1004.2539.2021.03.002

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Stiffness Model of Rolling Bearing Considering Clearance and Analysis of Its Time-varying Characteristic

Theory·Reserach | 更新时间：2022-11-10

- Stiffness Model of Rolling Bearing Considering Clearance and Analysis of Its Time-varying Characteristic
- Journal of Mechanical Transmission Vol. 45, Issue 3, Pages: 8-14(2021)
- 作者机构：
  
  1.西安理工大学机械与精密仪器工程学院，陕西西安 710048
- 作者简介：
- 基金信息：
- DOI：10.16578/j.issn.1004.2539.2021.03.002
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陈润霖,韩沁,张梦豪等.考虑游隙的滚动轴承刚度模型及其时变特性分析[J].机械传动,2021,45(03):8-14.

Chen Runlin,Han Qin,Zhang Menghao,et al.Stiffness Model of Rolling Bearing Considering Clearance and Analysis of Its Time-varying Characteristic[J].Journal of Mechanical Transmission,2021,45(03):8-14.
陈润霖,韩沁,张梦豪等.考虑游隙的滚动轴承刚度模型及其时变特性分析[J].机械传动,2021,45(03):8-14. DOI： 10.16578/j.issn.1004.2539.2021.03.002.

Chen Runlin,Han Qin,Zhang Menghao,et al.Stiffness Model of Rolling Bearing Considering Clearance and Analysis of Its Time-varying Characteristic[J].Journal of Mechanical Transmission,2021,45(03):8-14. DOI： 10.16578/j.issn.1004.2539.2021.03.002.

摘要

为了研究滚动轴承时变刚度对精密机床主轴回转精度的影响规律，在考虑游隙的条件下，建立滚动轴承的时变刚度模型，并提出采用平均刚度和刚度幅值变化率来表征刚度的时变特性。以深沟球轴承为例，分析了不同径向游隙、载荷、滚动体数对滚动轴承时变刚度的影响规律。结果表明，轴承的平均刚度与径向游隙负相关，与载荷和滚动体数正相关；刚度幅值变化率随着径向游隙的增大总体呈增大趋势，随载荷和滚动体数的增大总体呈减小趋势，但是，当等效承载滚动体数为整数时，滚动轴承刚度的时变特性最为明显。为了减小轴承刚度的时变特性，应当根据载荷等工况条件，选择合理的游隙和滚动体数。

Abstract

In order to research the influence of the time-varying stiffness of rolling bearings on the precision of spindle rotation of machine tools， a time-varying stiffness model of rolling bearings are established by considering the radial clearance. And the average stiffness and stiffness amplitude change rate are proposed to characterize the time-varying characteristics of stiffness. Taking deep groove ball bearings as an example， the influences of different radial clearances， loads， and numbers of bearing rolling elements on the time-varying stiffness of rolling bearings are analyzed. The results show that the average stiffness of the bearing is negatively related to the radial clearance and positively related to the load and the number of rolling elements； the stiffness amplitude change rate generally increases with the increase of the radial clearance， and decreases with the increase of the load and the number of rolling elements. But when the number of equivalent bearing rolling elements is an integer， the time-varying characteristics of rolling bearing stiffness are the most significant. In order to reduce the time-varying characteristics of bearing stiffness， a reasonable clearance and number of rolling elements should be selected according to the working conditions such as load and speed.

关键词

滚动轴承刚度模型时变特性游隙

Keywords

Rolling bearingStiffness modelTime-varying characteristicClearance

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