不同承载阶段行星滚柱丝杠副的变形研究  

Study on Deformation of Planetary Roller Screw at Different Loading Conditions

作　　者：刘子博 邓攀[2] 祖莉[1] 王凯[1] 黄鸿坤 黄强强 LIU Zi-bo;DENG Pan;ZU Li;WANG Kai;HUANG Hong-kun;HUANG Qiang-qiang(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Shanghai Marine Equipment Research Institute,Shanghai 200031,China)

机构地区：[1]南京理工大学机械工程学院,南京210094 [2]上海船舶设备研究所,上海200031

出　　处：《组合机床与自动化加工技术》2022年第6期188-192,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家科技重大专项(2018ZX04039001)。

摘　　要：为研究行星滚柱丝杠副在不同承载阶段的变形情况,在轻载弹性阶段,基于螺纹牙载荷分布,建立轴向刚度模型;在重载塑性阶段,引入精度系数表征加工误差下的螺纹牙不完全接触,得出滚柱丝杠副的额定静载荷计算方法,并根据有限元模型分析在额定静载荷作用下的整体变形量。随后利用垂直加载试验台验证不同承载下的变形量,分析载荷变形曲线,轻载工况下的理论与试验值相对误差在6%以内,额定静载荷工况下相对误差为6.84%;另外,对于高过载阶段,当轴向载荷越过受力变形曲线转折点且斜率趋近无穷大时,出现的传动失效和牙顶压痕现象也验证了样件已经达到承载极限。In order to study the deformation of planetary roller screw mechanism under different loads,in the elastic stage of light load,the axial stiffness model was established based on the load distribution of screw teeth.In the heavy load plastic stage,the precision coefficient was introduced to describe the incomplete contact of the screw teeth under the machining error,and the calculation method of the rated static load of the roller screw mechanism was obtained,and the overall deformation under the rated static load was analyzed according to the finite element model.Then the vertical loading testbench was used to verify the deformation under different load loads and analyze the load deformation curve.The relative error between the theoretical and experimental values under light load condition was less than 6%,and the relative error under rated static load condition was 6.84%.In addition,for the high overload stage,when the axial load exceeds the turning point of the stress deformation curve and the slope approaches infinity,the phenomenon of transmission failure and tooth top indentation also verifies that the sample has reached the bearing limit.

关 键 词：行星滚柱丝杠副 变形 轴向刚度 额定静载荷 承载极限 

分 类 号：TH16[机械工程—机械制造及自动化] TG506[金属学及工艺—金属切削加工及机床]