Cage Stability Analysis of Mixed-Mounted Double Row Angular Contact Ball Bearing

Abstract

The dynamic characteristics and rotational accuracy of rolling bearings are directly influenced by cage stability. Double row angular contact ball bearings (DACBBs) comprising two separate cages exhibit more complex motion characteristics. A spatial dynamic model of DACBB is constructed to compare the cage stability for the mixed-mounted mode and symmetrical-mounted mode. Considering the change of attitude angle of the cage in space, a slice method is employed to calculate the non-uniform cage-raceway contact force. Subsequently, the cage trajectories of two mounted modes are compared under the conditions of pure axial forces, combined forces, and rotational speeds. This study analyzes the advantages of mixed-mounted mode for improving cage stability in terms of contact force, collision point distribution, and velocity of cage-whirl motion. The results indicate that the mixed-mounted mode significantly enhances the residual preload of the unloading row. It also reduces the axial fluctuation range of the cage under different pure axial forces and maintains regular movement of the cage under different combined forces and rotational speeds.