双排四点接触球转盘轴承的有限元分析

Finite element analysis of double-row four-point contact ball slewing bearing

针对转盘轴承在受载时不再遵循刚性套圈假设这一实际情况,利用有限元分析软件ANSYS建立了双排四点接触球转盘轴承的实体有限元模型。根据转盘轴承的实际工况设置了模型的边界条件,通过求解计算得到了转盘轴承内部的受力状况,并将本文的计算结果与基于刚性套圈假设数值计算结果进行了比较。结果表明:采用有限元方法得到的结果中有更多的钢球受载,且钢球与滚道之间的最大接触应力值有所降低。这归因于有限元方法将套圈看作是弹性体,在转盘轴承受到外部载荷作用时套圈将发生径向平面内的结构变形。有限元方法得到的结果更加符合转盘轴承的实际受力状况。

For the actual situation that the slewing bearing no longer follows the rigid ring hypothesis under the loaded condition, the entity finite element model of double-row four-point contact ball slewing beating was established by using finite element analysis software ANSYS. The boundary conditions of the model were set according to the actual working condition of the slewing bearing, the internal stress state of the slewing bearing was obtained by solving and calculation, and the calculated results were compared with the numerical results based on the rigid ring assumption. Results show that more balls are loaded in the result of finite element method, and the maximum contact stresses between the ball and raceway have some reductions. This can be attributed to the fact that the finite element method looks ring as elastic body, under the action of external loads the ring will produce structure deformation in the radial plane. The results of the finite element method are more accord with the actual stress state of slewing bearing.