旋转多臂变速运动规律建模及其对开口机构传动影响  

Modeling of rotary shifting motion characteristics of electronic dobby and influence thereof on shedding mechanisms driving

作　　者：袁汝旺[1,2] 祝雷雷 吕雪奎 杨佳敏 YUAN Ruwang;ZHU Leilei;Lü Xuekui;YANG Jiamin(School of Mechanical Engineering,Tiangong University,Tianjin 300387,China;Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology,Tiangong University,Tianjin 300387,China;Jiangsu Jinlong Technology Co.,Ltd.,Suzhou,Jiangsu 215500,China)

机构地区：[1]天津工业大学机械工程学院,天津300387 [2]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 [3]江苏金龙科技股份有限公司,江苏苏州215500

出　　处：《纺织学报》2019年第12期127-133,共7页Journal of Textile Research

基　　金：天津市自然科学基金项目(18JCYBJC20200)

摘　　要：针对电子多臂开口对不同织造工艺的适应性问题,分析旋转变速机构构型及其运动特性,从运动合成角度提出基于固定凸轮-滑块的旋转变速机构运动学分析与设计方法,建立适于产品系列化设计的旋转变速疏密化正弦运动规律模型及其相对运动传动模型,探讨连杆参数变化对机构性能与开口工艺的影响。结果表明:转子臂与偏心连杆相对运动为近似等角速比传动,提综臂运动特征值由0. 000开始连续变化无突变;随疏密化调节系数增加,凸轮廓线、压力角、曲率半径、提综臂运动特征值及其相对主轴静止时间均减小;合理选择疏密化调节系数获得加速度或扭矩最优运动规律,可满足不同织造工艺需求,并为电子多臂机系列化设计提供理论基础与技术参考。In order to address the adaptability of electronic dobby shedding to different weaving technologies,the construction and motion characteristics of the rotary shifting mechanism were analyzed.Methods for kinetically analyzing and designing the mechanism based on the fixed cam-slider combination were proposed, and a rotary shifting density sinusoidal motion curve model and a relative motion transmission model were established to facilitate the serialized design of the products. Then the influence of the changes in the linkage parameters on the performance of the rotary shifting mechanism and the workmanship of the shedding was investigated. The results show that the relative motion between the rotator arm and the eccentric link can be approximated as the constant angular speed ratio transmission,where the jacklever’s motion eigenvalue starts from 0. 000 and changes continuously along with the density adjustment coefficient without abrupt changes. The cam contour,pressure angle,curvature radius,the motion eigenvalue of the jacklever and its time of relative stillness to the main shaft are all reduced. A proper selection of the density adjustment coefficient can facilitate achieving an optimal pattern of the changing acceleration speed or torque to meet the needs of different weaving technologies,thereby laying a theoretical groundwork and providing a technical reference to the serialized design of electronic dobby.

关 键 词：电子多臂机 旋转变速运动规律 开口机构 疏密化正弦规律 

分 类 号：TS1031[轻工技术与工程—纺织工程]