Dynamic modeling and properties analysis for ball bearing driven by structure flexible deformations

A comprehensive dynamic model of ball bearing focusing on structure flexible deformations is developed in this paper. The cage is split into several discrete segments linked by nonlinear springs to indicate the cage flexibility. The effect of cage flexibility on cage clearance is further considered. The race flexibility generated by assembly status variation of the shaft-bearing-housing system are then deduced, and the interplay mechanism between the race and other bearing components is analyzed. Finally, the effect of structure flexible deformations on bearing dynamic properties is investigated. The results indicate that rational design for structure flexibility can optimize bearing rotary performance.