Dynamic Response Analysis of Faulty Slewing Bearing with Three-Dimensional Localized Defects Under Offset Load Conditions

An enterprise ladle slewing table slewing bearing due to the low speed, heavy load, partial load conditions, stress concentration and other phenomena will occur, resulting in raceway local defects failure. Therefore, in order to study the influence of the local defects contained in the race-way on the dynamic response and contact state of the rolling body during operation, a dynamic model of the slewing bearing containing local defects is established based on the Gupta bearing dynamics model. By considering the translational and rotational motions between the components inside the slewing bearing and the contact and friction between the components, as well as pre-planning the location of the local defects in the slewing bearing and the three-dimensional geometric model to establish the dynamic analysis model containing local defects, in which through the secondary development of ADAMS, the simulation analysis to obtain the rolling body in the passing of the local defects. The results show that the localized defects in the inner and outer raceways have a great negative impact on the slewing bearing, which makes the dynamic contact condition between the internal parts of the slewing bearing more complicated, and not only increases the contact force and dynamic response between the rolling body, raceway and cage, but also accelerates the wear of the internal parts of the rolling body, which further accelerates the service life of the slewing bearing, and at the same time reduces the safety of the slewing bearing when it is in operation.