1. School of Mechanical Engineering, Qinghai University, Xining 810016, China; 2. State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China; 3. Luoyang Bearing Research Institute Co., Ltd, Luoyang 471039, China
Abstract：Grease lubricated angular contact ball bearings are usually used in spindle bearings of high-speed machine tools. The large temperature increases during high-speed operation seriously affect the bearing precision, resulting in a loss of operating precision and reduced service lives. This study predicts the bearing loads with the influence of thermal deformation on the force equilibrium of angular contact ball bearings. The local heat generation rates are predicted with grease lubrication using a multi-node thermal network to model the angular contact ball bearings that predicts each node temperature. The results show the influence of the thermal deformation on the bearing temperature rise and the forces on the bearing with the simulation results verified through experiments. The predicted bearing outer ring temperatures based on the force balance calculation with the thermal deformation are in good agreement with experimental data with errors of less than 10% which verifies the reliability of this method for predicting the temperature rise of grease lubricated high-speed bearings.
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2022, Vol. 62 
