基于ANSYS Workbench的轴承压装过程有限元分析

Finite Element Analyze of the Process of Press-fit of Bearing Based on ANSYS Workbench

为了分析轴承压装过程中不同轴承座壁厚对压装力、轴承座内部应力和应变的影响,为轴承座设计和改进提供参考依据,采用三维软件Solidworks建立轴承与轴承座过盈配合模型图,通过ANSYS有限元软件对轴承压装进行分析,得出不同轴承座壁厚情况下的压装力-时间曲线关系图。仿真结果表明,轴承外圈与轴承座刚接触时,轴承外圈对轴承座有冲击作用,压装力随时间先增加后波动,最后近似于平滑曲线变化;轴承座壁越厚,应力、应变越小。在设计轴承座时,应选择塑性较好的材料;在满足刚度的同时,轴承座壁厚尽可能小一些。

In order to analyze the influence of wall thickness on the compressive load and the stress and strain of the bearing seat, to provide reference for the design and improvement of bearing seat, the model of the interference fit between the bearing and the bearing pedestal was established by the 3 D software Solidworks. Based on the analysis of bearing pressing by finite element software ANSYS, the pressing force time curves under the condition of different bearing wall thickness was obtained. The simulation results show that when the outer ring and seat of a bearing just contacted, the outer ring had impacts on the bearing seat, as time increased, pressing force first increased, then in volatility, finally nealy smooth curve, bearing stress and strain decreased with the increase of pressing time and contact area. In the design of bearing seat, it is better to choose materials with plasticity;bearing seat wall should be as thin as possible at the same time to meet the stiffness.