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In the high-speed motorized spindle rotor system, the running accuracy and stability of angular contact ball bearings are significantly affected by temperature rise. In order to obtain a more accurate transient temperature field of angular contact ball bearings, a heat generation and heat transfer model considering spin was established, and the heat generation of the bearing was obtained by using MATLAB software, and then the factors affecting heat generation were studied, and at the same time, the Thermo-mechanical coupling finite element analysis was carried out on the LS-DYNA platform based on the explicit dynamics. The research results show that: the rotational speed is the main factor causing the temperature rise of the bearing; The greater the axial force, the more heat generated; at high speed, the heat generation is more sensitive to the increase in the axial force; The heat generation increases as the viscosity of the lubricant increases, which indicates that more energy is lost by the viscosity of the lubricant. The research can provide theoretical guidance for bearing design and stability analysis in high-speed rotor systems.
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