角接触球轴承流固耦合仿真分析

角接触球轴承在运行过程中的润滑状况至关重要,润滑油直接影响滚动轴承的接触状态。为分析角接触球轴承的润滑状况以及考虑润滑时轴承的机械特性,基于有限元和晶格玻尔兹曼方法,建立了双向流固耦合轴承仿真模型,对角接触球轴承进行动力学有限元仿真和润滑流体仿真,并与轴承拟静力学理论计算结果进行对比,验证模型的准确性。分析结果表明,保持架与滚珠接触并撞击,在轴承腔内油膜压力最大,滚珠与内圈、外圈滚道接触区分别为第二、第三大油膜压力区。润滑油受滚珠公转影响,沿着滚珠转动方向流动,实现对滚珠与内圈、外圈和保持架之间的润滑。滚珠运动和最大接触应力仿真结果与轴承拟静力学理论求解结果一致,即流固耦合仿真模型计算轴承机械特性具有较高的准确性。

Fluid-structure Coupling Simulation Analysis of Angular Contact Ball Bearing

The lubrication condition of angular contact ball bearings in operation is crucial,and the lubri?cant directly affects the contact state of rolling bearings.In order to analyze the lubrication condition of angular contact ball bearings and the mechanical characteristics of bearings considering lubrication,based on finite ele?ment method and Lattice-Boltzmann method,the bidirectional fluid-structure coupling simulation model of bearings is established.The dynamics finite element simulation and lubricating fluid simulation of angular con?tact ball bearings are carried out,and the results are compared with the calculation results of bearing quasi-stat?ic theory to verify the accuracy of the model.The results show that the cage is in contact with the ball and hits,the oil film pressure is the largest in the bearing cavity,and the contact areas of the ball with the inner ring and the outer ring raceway are the second and third largest oil film pressure areas respectively.The lubricating oil is affected by the revolution of the ball and flows along the direction of rotation of the ball to achieve lubrication be?tween the ball and inner ring,outer ring and cage.The simulation results of ball motion and maximum contact stress are consistent with the solution results of bearing quasi-static theory,that is,the fluid-structure coupling simulation model has high accuracy in calculating the mechanical characteristics of bearings.