Contact Theoretical Analysis And Simulation Of High Speed Ceramic Ball Bearing

Ceramic ball bearing has been an important part in light load and high speed rotating equipment because of its special advantages. In high speed, we tend to focus on rotating stability and durability of the part. Stability shows reliability and dynamic balance of the support part in the process of the movement. Durability shows influence on life because of the multi-body contact interaction with ceramic ball bearing cage, rolling body and rings. So it has an important significance for the life of the bearing according to studying the multi-body dynamic contact.The paper takes a hybrid ceramic ball bearing which used in high speed small compound molecular pump as the research aim mainly complete the work in the following three aspects:(1) Based on Hertz contact theory, the effect of the deep groove ball bearing channel curvature radius coefficient to contact force has been researched; By Hertz theory calculation and numerical simulation calculation of ANSYS Workbench, the distribution of stress, strain and deformation cloudy of the bearing is obtained when the ceramic ball bearing is under load.(2) The application of ANSYS Workbench transient dynamics simulation analysis was carried out on the bearing, it is concluded that contact process dynamic characteristics and bearing unit each element node displacement, velocity and acceleration variation law of the inner and outer ring, rolling element, retainer.(3) To carry on the dynamic test, the ceramic ball bearing outer ring radial vibrating acceleration signal is obtained, and use it compared with the results of the simulation calculation results are consistent.