保持架兜孔间隙对圆柱滚子轴承运动特性的影响OA

The clearance in the cage pocket of cylindrical roller bearings influences the kinematic characteris-tics such as slip and collision between the rollers and the cage,as well as the overall vibration of the bearing.the limitation of traditional dynamic models solely considering viscous drag effects of lubricant on rollers for cy-lindrical roller bearings,was addressed.Instead,the lubricant was described as a time-varying friction coeffi-cient related to the contact force between the rollers and raceways,along with flow resistances and resistance torques on the cage.Additionally,nonlinear spring and damping elements were employed to simulate the colli-sion contacts between the rollers and the cage,highlighting the impacts of the pocket clearance.The accuracy of the proposed model was validated,and the influences of the cage pocket clearance on the kinematic charac-teristics of the roller-cage speed,slip,and collision,as well as the vibration characteristics of the bearing,were investigated.Simulation results indicate that,as the cage pocket clearance increases within the range of 0.1 mm to 0.7 mm,the cage slip rate rises,leading to more severe speed fluctuations and compromising cage stability.Simultaneously,the roller's spin slip rate decreases,which reduces the collision frequency between the roller and the front and rear ends of the cage pocket,while the collision force increases.Furthermore,the overall vibration of the bearing intensifies with the increasing pocket clearance.The study can provide valuable insights for the design and failure analysis of cylindrical roller bearings.