基于ANSYS-Workbench的谐波减速器柔轮结构优化分析

Optimization Analysis of Flexible Wheel Structure of Harmonic Reducer Based on ANSYS-Workbench

柔轮是谐波减速器的核心部件,也是最容易失效的部分,其工作寿命决定了谐波减速器的寿命。针对柔轮结构设计中高寿命、高承载能力的要求,以柔轮中筒长、壁厚等关键结构参数为研究对象,建立柔轮受力数学模型,分析单因素对柔轮应力应变的影响规律。基于Design Exploration响应面子模块探究不同因素的搭配对柔轮应力应变的影响及补偿规律,利用CFTOOL函数拟合得到柔轮应力的回归曲线。分析结果表明:单因素筒长对柔轮应力影响最大,通过减小径向变形量补偿增大齿圈宽度对柔轮应力的影响,增大齿圈宽度可补偿增大筒长对柔轮应力的影响。柔轮结构设计最佳参数组合为壁厚0.45 mm、筒长50~60 mm、齿圈宽度12~13 mm,该柔轮等效应力比最大应力降低18.5%,满足设计要求。

The flexible wheel is the core component of the harmonic reducer and the most vulnerable part.The working life deter⁃mines the life of the harmonic reducer.Aiming at the requirements of high life and high load capacity in the design of flexible wheel structure,the key structural parameters such as length and wall thickness of the flexible wheel were taken as the research object,and the mathematical model of the mechanical force of the flexible wheel was established to analyze the influence law of single factor on the stress and strain of the flexible wheel.Based on the Design Exploration response surface,the influence of the combination of different factors on the stress and strain of the flexible wheel and the compensation law were explored.The regression curve of the flexible wheel stress was obtained by using CFTOOL function.The analysis results show that the single factor tube length has the greatest influence on the flexure stress.By reducing the radial deformation compensation,the influence of increasing ring gear width on flexible wheel stress is compensated by reducing the radial deformation.The influence of increasing cylinder length on flexible wheel stress can be compensa⁃ted by increasing the ring gear width.The optimal parameter combination of the flexible wheel structure design is that the wall thickness is 0.45 mm,the cylinder length is within 50~60 mm and the ring gear width is within 12~13 mm.The equivalent stress of the flexible wheel designed according to the optimal parameter combination was 18.5%lower than the maximum stress,which meets the design re⁃quirements.