基于乌龟壳结构的仿生球轴承静力学仿真分析

Statics simulation analysis of bionic ball bearing based on tortoise shell structure

为了减轻轴承滚动体的质量,通过分析仿生乌龟壳的层状结构,提出了一种三层材料滚动体的仿生球轴承结构。首先,对符合赫兹理论的实心球轴承进行了接触应力的计算;然后,利用Workbench软件对实心球轴承进行了静力学仿真,得到了在误差允许范围内的仿真值与理论值;最后,利用该分析流程对不同中间层厚度滚动体的仿生球轴承进行了静力学分析,并将其与实心球轴承进行了相应的对比分析。研究结果表明:随着滚动体中间层厚度的增加,仿生球轴承的最大接触应力呈现出非线性下降趋势,且应力均低于实心球轴承;仿生球轴承的最大等效应力呈现出先减小、再增大的趋势;在设计的仿真试验中,当滚动体中间层厚度为5.0 mm时,仿生球轴承的最大等效应力最低,且低于实心球轴承;该研究结果可以为球轴承滚动体的结构设计提供理论依据。

In order to reduce the quality of bearing rolling elements,a bionic ball bearing structure with three-layer material rolling elements was proposed through the layered structure of the bionic tortoise shell.First,the contact stress was calculated for the solid ball bearing conforming to the Hertz theory,then the Workbench software was used to perform the static simulation of the solid ball bearing.The simulation and theoretical values within the allowable error range were obtained.Finally,the analysis process was used to analyze the different intermediate layers.The bionic ball bearing with thick rolling elements was statically analyzed and compared with the solid ball bearing.The research results show that as the thickness of the intermediate layer of the rolling elements increases,the maximum contact stress of the bionic ball bearing shows a nonlinear downward trend and is lower than that of the solid ball bearing;the maximum equivalent(von-Mises)stress of the bionic ball bearing shows first decrease and then increase in the designed simulation test,when the thickness of the middle layer of the rolling element is 5.0 mm,the maximum equivalent(von-Mises)stress of the bionic ball bearing is the lowest and is lower than that of the solid ball bearing.The above research content provides a theoretical basis for the structural design of ball bearing rolling elements.