曲梁臂板弹簧的应力均匀化设计  

Stress uniform distribution design of curved beam arm linear flexure bearings

作　　者：李金泽 荀玉强[1] 全加[1] 洪国同[1,2] LI Jinze;XUN Yuqiang;QUAN Jia;HONG Guotong(Key Laboratory of Technology on Space Energy Conversion,Technical Institute of Physics and Chemistry,Chinese Academy of Science,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院理化技术研究所,中国科学院空间功热转换技术重点实验室,北京100190 [2]中国科学院大学,北京100049

出　　处：《华中科技大学学报（自然科学版）》2021年第8期20-26,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金青年基金资助项目(51806228)。

摘　　要：针对曲梁臂板弹簧(带有伸出式根部固定结构的偏心渐开线涡旋臂板弹簧)应力分布不均匀、许用行程还有很大优化空间的问题,应用旋臂形状迭代设计法使旋臂应力均匀且最小.相比于目前较先进的形状因子法优化槽线设计出的板弹簧,旋臂形状迭代设计法能够做到在轴向和径向刚度基本一致的情况下,增加许用行程17.2%.首次引入板弹簧旋臂等效力作用点的概念,并导出了旋臂截面最大范式应力表达式,将其应用于旋臂宽度分布迭代设计.有限元模拟分析表明:应用旋臂形状迭代法设计出的板弹簧各截面最大范式应力沿旋臂分布均匀,与应力设计目标相比浮动不超过3%.In order to solve the problems of uneven stress distribution and to make full use of the room left for travel optimization of curved beam arm linear flexure bearings(eccentric involute spiral arm linear flexure bearing spring with extended fixing structure of spring arm root), the iterative design method of the spring arm shape made the stress of the spring arm uniform and minimum.Compared with the flexure bearing designed by the advanced shape factor method, the allowable stroke of the flexure bearing designed by the iterative arm shape design method can be increased by 17.2% in the case of little change in axial and radial stiffness.The equivalent force action point of spring arm was applied in design for the first time, and the maximum von Mises stress expression of each arm section was derived for the first time. Both were applied into the iterative design process of arm width distribution.Through finite element simulation,it is proved that the stress of the spring designed by the arm shape iteration method is uniformly distributed along the spring arm,and the maximum von Mises stress of each section of the spring arm floats less than3% compared with design stress.

关 键 词：板弹簧 曲梁臂 等效力及其作用点 迭代设计法 伸出式固定结构 

分 类 号：TB65[一般工业技术—制冷工程] TH135[机械工程—机械制造及自动化]