INVESTIGATIONS ON CAGE DYNAMICS IN ROLLING BEARINGS BY TEST AND SIMULATION

摘要

Using the multi-body simulation tool Caba3D, it has been shown that the dynamics of a rolling bearing cage can be calculated for different cage motion types. To distinguish these classes, important characteristics are developed which form the CDI (Cage Dynamics Indicator). With the help of quadratic discriminant analysis the cage movements can be automatically classified into the movement types unstable, stable and circling. On the basis of 402 simulations, a prediction accuracy of 93.3 % could be achieved after five-fold cross-validation, which can be considered reliable for practical application. Finally, the cage movement for a cylindrical roller bearing calculated in the simulation and measured in the experiment was compared. As predicted in the simulation, cage instability could be observed in the experiment. The results show a high qualitative agreement, only quantitative discrepancies in the frequency of the deformation can be observed.