Abstract: Aiming at the problems of complex fault characteristics of bearing wave cages, difficult extraction of fault parameters and ineffective fault diagnosis, the manifestations of crack faults of wave cages were studied from the perspective of dynamic mechanism, and a method based on multi-body dynamics simulation to study the dynamic characteristics of bearing cages was proposed. Firstly, in order to better show the actual situation of cage operation, the dynamic differential equation of ball bearing was solved by the solver of virtual physical prototype ADAMS. Secondly, the six degrees of freedom of the cage were completely retained in the dynamic model, and the rigid-flexible coupling was realized by replacing the rigid body cage with the flexible body cage. Finally, for the simulation results, the vortex trajectory of the barycenter of the cage, the probability density function of the speed of the cage, and the difference of the contact force between the cage pocket and the ball under different crack cages were emphatically studied. The analysis results show that the dynamic characteristics of the centroidal vortex trajectory and the probability density distribution of the specific rotational speed change significantly from the process of crack initiation to fracture of the wave cages, which can be effectively applied to the crack fault diagnosis of the wave cages of the ball bearing.

Key words:  deep groove ball bearing;wave cage; crack faults; dynamic characteristics; ADAMS; rigid-flexible coupling

XIE Hong-hao, NIU Lin-kai, XIAO Fei, et al. Analysis of dynamic characteristics of bearing wave cages with crack faults［J］.Journal of Mechanical & Electrical Engineering, 2021,38(11):1458-1464.