摘要
对于机器人用薄壁角接触球轴承而言,在满足其一定寿命的基础上,接触刚度是轴承第一性能指标,轻量化是其另外一个重要指标,为此,以某机器人用薄壁角接触球轴承为对象,对其结构参数进行了多目标优化设计。首先,根据轴承的实际工况要求,建立了以内圈沟道曲率半径系数、外圈沟道曲率半径系数、滚珠直径、节圆直径和滚珠数为影响因素,以接触刚度、接触疲劳寿命和质量为目标函数的薄壁角接触球轴承优化数学模型,并采用数值模拟计算方法,得到了每个因素不同水平值所对应的目标值;然后,基于正交试验法对轴承结构参数进行了多目标优化设计;最后,通过极差分析和综合平衡分析法确定了轴承的最优结构参数。研究结果表明:针对一定寿命条件、较高刚度和轻量化的设计要求,采用正交试验法对轴承进行多目标优化设计是一种高效可行的方法,可对其他类型轴承的优化设计提供有价值的参考。
For the thin-section angular contact ball bearing for robot,on the basis of meeting its certain service life,the contact stiffness is the first performance index of the bearing,and lightweight is another important index.Therefore,taking the thin-section angular contact ball bearing for robot as the object,the multi-objective optimization design of its structural parameters was carried out.Firstly,according to the actual working conditions of the bearing,the optimized mathematical model was built with the curvature radius coefficient of inner ring groove,the curvature radius coefficient of outer ring groove,the ball diameter,the pitch diameter and the number of balls as the influencing factors,and the contact stiffness,the contact fatigue life and the quality as the objective function.And the numerical simulation calculation method was used to obtain the target value corresponding to the different level values of each factor.Then,the multi-objective optimization design of bearing structural parameters was carried out based on orthogonal test method,the bearing structure parameters were optimized based on the orthogonal experiment method.Finally,the optimal structure parameters of bearings were determined through the range analysis and comprehensive balance analysis method.The results indicate that in view of the design requirements of certain life conditions,high stiffness and light weight,it is an efficient and feasible method to carry out multi-objective optimization design of bearings by using the orthogonal test method,which provides a valuable reference for the optimization design of other types of bearings.
作者
李俊文
陈玉莲
LI Jun-wen;CHEN Yu-lian(School of Intelligent Manufacturing and Electrical Engineering,Guangzhou Institute of Science and Technology,Guangzhou 510540,China)
出处
《机电工程》
CAS
北大核心
2022年第7期919-926,共8页
Journal of Mechanical & Electrical Engineering
基金
广东省普通高校特色创新类项目(2019KTSCX242)
广东省高等教育教学改革项目(2019SJG01)。
关键词
薄壁角接触球轴承
正交试验法
多目标优化
轴承寿命
接触刚度
轴承轻量化设计
thin-section angular contact ball bearing
orthogonal test method
multi-objective optimization
bearing life
contact stiffness
lightweight design of bearing
