Abstract:Considering the flexible cage and the interaction relationship between the components of the deep groove ball bearing, the ADAMS/View was used to build a multi-body dynamic analysis model for bearing rigid-flexible coupling of different cages under vacuum conditions. The effects of rotation speed, cage thickness and cage pocket on bearing dynamic characteristics were analyzed. The results show that, as the bearing speed increases, the cage has lower speed stability, higher dynamic contact force and slip rate, and the trajectory of the center of mass is cylindrical. The thickness of the cage has the greatest impact on the dynamic performance of the cage, and the trajectory of the center of mass is greatly affected by the shape of the pocket. The optimal working condition and design of the cage on the momentum wheel is a square pocket with the thickness of 2mm and the bearing speed of 2000 (r/min).