空间连杆引纬机构的刚柔耦合磨损分析  

Rigid-flexible coupling wear analysis of spatial linkage weft insertion mechanism

作　　者：李博[1,2] 刘旭柠 郭杰[1,2] 胡凯 畅博彦[1,2] 魏展[1,2] LI Bo;LIU Xuning;GUO Jie;HU Kai;CHANG Boyan;WEI Zhan(Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology,Tiangong University,Tianjin 300387,China;School of Aeronautics and Space,Tiangong University,Tianjin 300387,China;Pinggao Group Energy Storage Technology Co.,Ltd.,Tianjin 300300,China)

机构地区：[1]天津工业大学天津市现代机电装备技术重点实验室,天津300387 [2]天津工业大学航空航天学院,天津300387 [3]平高集团储能科技有限公司,天津300300

出　　处：《纺织学报》2024年第6期186-192,共7页Journal of Textile Research

基　　金：国家自然科学基金项目(52005368)。

摘　　要：为准确预测空间连杆引纬机构间隙磨损机制,通过结合Lankarani-Nikravesh与Bai碰撞力模型,建立可变刚度与阻尼系数非连续接触碰撞力模型,采用改进的Coulomb摩擦力模型描述含间隙机构旋转铰的切向摩擦力,通过Lagrange方法对系统动力学建模;其次选取空间连杆为柔性化对象,综合Ansys与Adams分析,对空间连杆引纬机构进行刚柔耦合动力学仿真;最后将系统的动态仿真响应结果与Archard模型相结合,求解运动副磨损情况。结果表明:柔性构件可以有效缓解机构间隙碰撞的冲击作用,间隙为0.15 mm条件下,剑头加速度振荡最大幅值缩减53.2%;当间隙升至0.5 mm后,虽磨损范围大幅增加,但间隙磨损深度并未随之大幅提升。Objective In calculating the wear of the kinematic pair in the spatial linkage weft insertion mechanism with clearance,the role and change process of the clearance in the wear process of the hinge clearance cannot be accurately expressed if simply considering the clearance of the flexible hinge or simply consider the flexible deformation of the rod.Therefore,in order to improve the calculation accuracy of clearance impact wear prediction,the influence of various factors on the system motion output should be considered comprehensively,so as to meet the requirements of high speed,light weight and heavy load of the mechanism and improve the operation accuracy of the mechanism.Method Firstly,combined with the Lankarani-Nikravesh and Bai model,the variable stiffness and damping discontinuous contact impact force model was established.The improved Coulomb friction model was used to describe the friction between the shaft pin and the sleeve of the rotating hinge with clearance mechanism,and the system dynamics was modeled by Lagrange method.Secondly,the spatial linkage was selected as flexible object,and the rigid-flexible coupling dynamics simulation of the spatial linkage weft insertion mechanism was carried out by combining Ansys and Adams methods.Finally,the dynamic simulation response results of the sys-tem were combined with the Archard model.Results In the rigid-flexible coupling system,the maximum stress of the spatial linkage was distributed near the rotating pair,and the maximum deformation distribution of the unit displacement was also at the hinge point of the two support frames.As the clearance was increased to r=0.5 mm,the component flexibility failed to effectively alleviate the speed fluctuation caused by the clearance impact during the process of the rapier head sliding out of the shuttle,while in the weft handover process,the component flexibility effectively slowed down the high-frequency fluctuation of the rapier head acceleration.When the clearance r=0.15 mm,the relative sliding distance showed a hi

关 键 词：引纬机构 接触碰撞力模型 Coulomb摩擦力模型 刚柔耦合磨损 空间连杆 

分 类 号：TS103.33[轻工技术与工程—纺织工程] TH117.1[轻工技术与工程—纺织科学与工程]