Mechanical Properties Analysis of Cylindrical Roller Bearings with Different Profiles under Combined Load

Rolling bearing is one of the core basic components of the aero-engine, which mainly undertakes the role of supporting the rotor and the corresponding parts and transferring the load. Considering the rotating effect and important error sources such as axial predeformation and radial clearance that may occur during the installation of cylindrical roller bearings, this paper establishes a four-degree-of-freedom static analysis model of cylindrical roller bearings based on Hertzian elastic contact theory and conducts a comparative study on the mechanical characteristics of aero-cylindrical roller bearings with different profiles. The results show that as the radial load increases, the radial displacement and stiffness of the roller bearing will increase, whereas the fatigue life of the bearing will gradually decrease. Compared with the external load, the rotating speed has less influence on the stiffness of roller bearings. In addition, the profile of rolling elements as a basic structural parameter of the bearing will also have a greater impact on the mechanical properties of the roller bearings, which should be designed and used in conjunction with the actual situation in engineering applications.