双排非对称四点接触球转盘轴承力学性能分析

doi:10.3901/JME.2018.09.177

机械工程学报 ›› 2018, Vol. 54 ›› Issue (9): 177-186.doi: 10.3901/JME.2018.09.177

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双排非对称四点接触球转盘轴承力学性能分析

牛荣军¹, 徐金超¹, 邵秀华², 邓四二¹

1. 河南科技大学机电工程学院洛阳 471003;
2. 洛阳鸿元轴承科技有限公司洛阳 471132

收稿日期:2017-05-05 修回日期:2017-12-19 出版日期:2018-05-05 发布日期:2018-05-05
作者简介:牛荣军,男,1977年出生,博士,副教授,硕士研究生导师。主要研究方向为滚动轴承设计及理论、滚动轴承摩擦学设计。E-mail:niurj@haust.edu.cn
基金资助:
国家"十二五"科技攻关（JPPT-ZCGX1-1）、高端轴承摩擦学技术与应用国家地方联合工程实验室开放基金（201708）和河南省自然科学基金（162300410086）资助项目。

Mechanical Properties Analysis of Asymmetric Double Row Four-point-contact Slewing Bearing

NIU Rongjun¹, XU Jinchao¹, SHAO Xiuhua², DENG sier¹

1. School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471003;
2. Luoyang Hongyuan Bearing Technology Co. Ltd., Luoyang 471132

Received:2017-05-05 Revised:2017-12-19 Online:2018-05-05 Published:2018-05-05

摘要/Abstract

摘要： 接触角是轴承设计的一个重要参数，它直接影响轴承的变形、受力和寿命等特性。随着轴承空间限制和高承载能力的目标要求，对传统负游隙对称型（α₀₁=α₀₂=45°）双排四点接触球转盘轴承进行改进，提出非对称型接触角设计（α₀₁=35°~60°，α₀₂=90°-α₀₁），并建立非对称双排四点接触轴承的力学模型，分析非对称接触角对轴承载荷分布、轴承刚度和承载能力的影响。结果表明：随着非对称接触角的增大，非对称双排四点接触球转盘轴承四点接触球个数先减小后增大，轴承的最大接触载荷先减小后增大；单向载荷作用下，随着非对称接触角的增加，轴向刚度K_aa不断提高，径向刚度K_rr和角刚度K_θθ在非对称接触角为60°时最大，45°时最小。联合载荷条件下，非对称接触角为45°和50°时的主刚度明显小于其它非对称接触角情况，辅刚度具有明显的对称性；在轴承正常工作区域，随着非对称接触角α₀₁的增加，轴承的静承载能力基本呈下降趋势，以轴承静承载能力为选型指标可取非对称接触角α₀₁=35°，α₀₂=55°。

关键词: 非对称, 接触角, 四点接触, 转盘轴承

Abstract: Contact angle is an important design parameter of rolling bearing. It obviously affects the deformation, contact stress and working life of rolling bearing. Currently, the bearing space is limited, but load carrying capacity of the bearing is higher. In the paper, a new design of asymmetric contact angle(α₀₁=35°~60°,α₀₂=90°-α₀₁) double row four-point-contact slewing bearing is proposed based on the normal negative clearance and symmetric contact angle (α₀₁=α₀₂=45°) type. In order to accurately investigate the influence of the asymmetric contact angle on the load distribution, stiffness and carrying capacity, the mechanical model of the asymmetric double row four-point-contact bearing is firstly established. The results show that with the increase of the asymmetric contact angle, the number of four-point contact balls decreases at first and then increases, the maximum contact load of the bearing firstly decreases and then increases; under the action of one direction load, with the increase of the asymmetric contact angle, the axial stiffness K_aa of the bearing increases, the radial stiffness K_rr and angular stiffness K_θθ are the largest when the asymmetric contact angle is 60°, and are smallest when the asymmetric contact angle is 45°. Under combined load conditions, the main stiffness at asymmetric contact angles 45ånd 50åre significantly smaller than that at others. The auxiliary stiffness has obvious symmetry. Under the normal operating conditions, with the increases of the asymmetric contact angle α₀₁, the static carrying capacity of the bearing present a downward trend. Taking the static carrying capacity as the performance index, the asymmetric contact angle α₀₁=35°,α₀₂=55° is suitable.

Key words: asymmetric, contact angle, four-point-contact, slewing bearing

中图分类号:

THl33

牛荣军, 徐金超, 邵秀华, 邓四二. 双排非对称四点接触球转盘轴承力学性能分析[J]. 机械工程学报, 2018, 54(9): 177-186.

NIU Rongjun, XU Jinchao, SHAO Xiuhua, DENG sier. Mechanical Properties Analysis of Asymmetric Double Row Four-point-contact Slewing Bearing[J]. Journal of Mechanical Engineering, 2018, 54(9): 177-186.

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双排非对称四点接触球转盘轴承力学性能分析

Mechanical Properties Analysis of Asymmetric Double Row Four-point-contact Slewing Bearing

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