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Local skidding characteristics of cylindrical roller bearing and its influencing factors |
Ming LI1( ),Jinhua ZHANG1,Wenchao LI2,Hongqi WANG1,Jun HONG1,Bin FANG1,*( ) |
1. Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi’an Jiaotong University, Xi’an 710049, China 2. Luoyang Bearing Research Institute Co. Ltd, Luoyang 471003, China |
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Abstract A complete dynamic model comprehensively considering the interactions among all components was constructed, to investigate the localized skidding characteristics of rollers varying with position, and to clarify the mechanism of localized skidding within the rolling elements. This model aimed to reveal the generation mechanism and action mechanism of bearing skidding, and to explore the influence of two operating parameters, namely radial load and spindle speed, on the skidding characteristics of the bearing. Results showed that the roller skidding inside the bearing presented periodic fluctuation. The influences of the two operating parameters, radial load and spindle speed, on the skidding characteristics of the bearing were explored. The fluctuation range of skidding rate increased with the increase of radial load, and decreased with the increase of bearing speed. Moreover, there was a sudden increase in the slip rate of the roller during the cross-zone movement of the roller into the bearing area. At this moment, the roller and the cage pocket had a violent collision, resulting in a decrease in the local motion stability of the roller. Cylindrical roller bearings operating at medium and low speeds should prioritize using roller skidding rate as their slip evaluation index. For cylindrical roller bearings operating at high speeds, the skidding rate of the cage should be given priority as the evaluation indicator.
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Received: 11 January 2024
Published: 10 March 2025
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Fund: 国家自然科学基金资助项目(52205281);中国博士后科学基金资助项目(2021M62551);国机精工开放基金资助项目(JG01KF0202202). |
Corresponding Authors:
Bin FANG
E-mail: percygod@stu.xjtu.edu.cn;binfang@mail.xjtu.edu.cn
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圆柱滚子轴承的局域打滑特性及其影响因素
为了探明滚子随位置变化的局域打滑特性,厘清内部滚动体局域打滑机理,构建综合考虑各部件相互作用的完全动力学模型,以揭示轴承打滑现象的产生机制及作用机理,并探究径向载荷和主轴转速2种工况参数对轴承打滑特性的影响. 研究发现,轴承内部滚子打滑呈现周期性波动,打滑率的波动范围随径向载荷的增大而增大,随轴承转速的增大而减小;滚子在跨区运动过程中(由非承载区进入承载区)存在打滑率突增现象,此时,滚子与保持架兜孔发生剧烈碰撞,造成滚子的局域运动稳定性下降. 对于中低速工况下运行的圆柱滚子轴承,应优先选用滚子打滑率作为打滑评价指标;对于高速工况下运行的圆柱滚子轴承,应优先选用保持架打滑率作为评价指标.
关键词:
圆柱滚子轴承,
动力学分析,
局域打滑特性,
滚子打滑
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