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Dynamic and thermal characteristics of angular contact ball bearings considering thermal expansion
Published:2023-02-15 author:LI Jun-hao, ZHANG Chang. Browse: 1079 Check PDF documents

Dynamic and thermal characteristics of angular contact 
ball bearings considering thermal expansion


LI Jun-hao1, ZHANG Chang1,2

(1.School of Mechanical Engineering, Qinghai University, Xining 810016, China; 
2.State Key Laboratory of 
Tribology, Tsinghua University, Beijing 100084, China)


Abstract: The internal force of the angular contact ball bearings with combined load was complex. Bearing operation was greatly affected by the thermal deformation of each component due to temperature rise under high speed and heavy load conditions. Aiming at these problems, the dynamic and thermal characteristics analysis method in consideration of thermal deformation was proposed.Firstly, based on the internal geometric relationship and the force analysis of the bearing where thermal deformation was introduced, and model was established for the calculation of the geometric balance equations, ball and inner ring force balance equations. Then,the temperature of each component of the bearing was calculated from the heat generation and heat transfer model. And the indirect coupling method was used to bring the thermal deformation of each component into the load calculation model. The dynamic parameters of the bearing, the size of the heat generation rate and the temperature change in consideration of thermal deformation were analyzed. Finally, the accuracy of the model was verified with a temperature rise test. The results of the study show that all the parameters of the angular contact ball bearings operation are greatly affected by thermal deformation, and stable operation of bearings is influenced by combined loads.Mistakes between theoretical and experimental temperatures in consideration of thermal deformation are around 7%, and the accuracy of the model in predicting the dynamic parameters and temperature rise of bearings under high speed and heavy load is verified .

Key words:  rolling bearing; combine loads; bearing temperature rise experiment; heat transfer model; load calculation model; thermal expansion parameters; mechanical and kinematic analysis


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