摘要
基于有限元计算研究了涡旋柔性弹簧的结构参数对弹簧的应力分布和刚度的影响,对于机械制冷机柔性弹簧的间隙密封设计,指出了径向刚度在不同径向力角度和偏心距下的变化规律。对阿基米德螺线的刚度进行了理论分析,得到了轴向刚度公式,提出用刚度应力系数来评价弹簧性能。最后将理论应用于有限元模拟中,在相同的轴向刚度下,对比五种涡旋型线,阿基米德螺线的最大应力最小,适用于长寿命机械制冷机的柔性弹簧设计。
Based on finite element simulation,the influence of the structural parameters of the spiral flexure spring on its stress distribution and stiffness is studied.For the gap seal design of flexure spring of mechanical refrigerator,it points out the variation law of radial stiffness under different radial force angles and eccentricity.The stiffness of the Archimedes spiral is theoretically analyzed,and the axial stiffness formula is obtained.The stiffness-stress coefficient is proposed to evaluate the spring performance.Finally,the theory is applied to the finite element simulation.Under the same axial stiffness,the maximum stress of the Archimedes spiral is the smallest compared with the other four spiral profiles,which is beneficial to the spiral profile flexure spring design of the long-life mechanical refrigerator.
作者
赵千祥
陈曦
缪源
ZHAO Qianxiang;CHEN Xi;MIAO Yuan(School of Energy and Power Engineering,University of Shanghai for Science&Technology,Shanghai 200093,China)
出处
《真空与低温》
2020年第4期288-294,共7页
Vacuum and Cryogenics
基金
国家“十三五”装备预研领域基金(61404140204)。
关键词
机械制冷机
柔性弹簧
刚度
有限元分析
mechanical refrigerator
flexure spring
stiffness
finite element analysis
