Abstract:Aimed at the flow characteristics of lubricating grease in angular contact ball bearing,the accurate analysis model for the grease flow inside angular contact ball bearing was established,the motion of each component in the bearing cavity was simulated by using the multiple reference system,the nonnewtonian fluid model was used to simulate the rheological properties of grease,the distribution and flow velocity of grease inside the bearing cavity were analyzed by using CFD software Fluent.The results show that,grease inside bearing chamber is mainly distributed over the both sides of the rolling elements along the outer raceway,and its flow speed is low;some grease adheres to the inner side of cage with high speed;the grease distributed on the inner raceway and rolling is the least,its flow speed is the highest;with the increase of bearing rotation speed,more grease is distributed over the both sides of the rolling elements along the outer raceway,grease between the inner raceway and cage is reduced,and the flow speed of the grease in bearing is increased;with the increase of grease viscosity,cage width and grease filling amount,the grease distribution inside the bearing chamber becomes relatively uniform,the amount of grease between the cage and the inner raceway is increased,which is beneficial to bearing lubrication.
