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Temperature rises characteristics of angular contact ball bearings considering roundness error
Published:2024-08-30 author:MA Ruixiang, YU Yongjian, XUE Yujun, et al. Browse: 524 Check PDF documents
Temperature rises characteristics of angular contact ball 
bearings considering roundness error


MA Ruixiang1, YU Yongjian1,2,3,4, XUE Yujun1,4,5, LIU Yonggang1


(1.School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471003, China; 

2.Longmen Laboratory, Luoyang 471000, China; 3.Henan Province Collaborative Innovation Center for High end 

Bearings, Luoyang 471003, China; 4.Henan Key Laboratory for Machinery Design and Transmission System, Henan 

University of Science and Technology, Luoyang 471003, China; 5.State Key Laboratory of Aviation Precision Bearings, 

Luoyang LYC Bearings Co., Ltd., Luoyang 471039, China)


Abstract: In the past, the research on the temperature rises characteristics of bearings paid more attention to the influence of bearing temperature rise and roundness error on bearing vibration, among which the literature on the influence of roundness error on bearing temperature rise was less, and the research object mostly aimed at the temperature rise of lowspeed and lightload bearings. Therefore, the thermalmechanical coupling model of angular contact ball bearing considering roundness error, bearing preload, centrifugal effect and thermal coupling was established, and the influence law of bearing raceway roundness error on bearing temperature rise was studied. Firstly, based on the principles of bearing quasidynamics, electrohydrodynamic lubrication theory, heat transfer theory, and Kirchhoffs energy conservation law, a thermalforce coupled model for angular contact ball bearings was established, taking into account factors such as roundness error, bearing preload, centrifugal effects, and thermal coupling. Then, the model was utilized to analyze the impact of different operating conditions and roundness errors on the temperature rise characteristics of the bearings. Finally, by comparing the model calculations with experimental results, the rationality of the model was validated. The research results indicate that,the maximum relative error between model calculation and experimental results is 5.37%. With the increase of roundness error orders, the temperature of the bearing exhibits fluctuating changes, and the fluctuation trend becomes more significant with the increase of speed. As the temperature of the lubricating oil rises, the temperature fluctuation gradually decreases. When the order of roundness error equals n/2±2 (n=1,2,3…), the outer ring temperature of the bearing is lower than when roundness errors are not considered. Therefore, controlling roundness errors within specific orders can effectively reduce the temperature rise of the bearing, thus improving operational efficiency. The fluctuation of the outer ring temperature of the bearing is proportional to the amplitude of the outer ring roundness error, providing important references for bearing design. There is a periodic variation between the outer ring temperature and the channel roundness error orders, which is mapped to the number of steel balls. When the roundness error order equals (2n-1)/4 times the number of balls (n=1,2, 3…), the outer ring temperature of the bearing reaches its maximum. When the roundness error order equals n/2 times the number of balls (n=1,2,3…), the outer ring temperature of the bearing is at its lowest. This pattern provides specific directions for the optimization of bearings.

Key words:  thermalmechanical coupling model of angular contact ball bearing; bearing quasidynamic model; roundness error of bearing groove; thermal network method; friction torque; temperature fluctuation
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