Analysis of influence of speed variation of high speed ball bearings on cage dynamic performance.

With the aim of increasing the stability of highspeed ball bearings in the transmission system of agricultural machinery, taking a type 7004 high speed angular contact ball bearings as the research material, a dynamic model of high speed ball bearings was built based on the geometry and force relationship of bearing elements. The integration method used by Runge-Kutta and Newton-Raphson is proposed to efficiently solve the nonlinear equations. The accuracy of the dynamic model constructed in this paper was verified by the testing and computation results studied by Gupta. A computation program is developed and the cage stability at different bearing rotation speeds is studied. The results shown that the increase of bearing rotation speed has improved both the cage stability and cage sliding ratio. In addition, the impact between the cage pocket and the ball has a serious effect on cage stability when the bearing is in the starting process. This study provides support for the design of working conditions and failure analysis of ball bearings, as well as a theoretical basis for analysis of the system stability of transmission systems in agricultural machinery.