经编机电子横移系统机械刚度对其性能的影响  

Research on influence of stiffness of electronic transverse system in warp knitting machine

作　　者：付睿云 周炯 FU Ruiyun;ZHOU Jiong(East Pudong Branch,Shanghai Open University,Shanghai 201200,China;Fudan University Affiliated Pudong Medical Center,Shanghai 201399,China)

机构地区：[1]上海开放大学浦东东校,上海201200 [2]复旦大学附属浦东医院,上海201399

出　　处：《毛纺科技》2024年第9期97-103,共7页Wool Textile Journal

摘　　要：针对机械刚度影响经编机横移精度和动态性能等问题,从全局机电耦合角度建立电子横移的机电耦合模型,得出机械动刚度矩阵,确定影响机械刚度的关键参数。考虑到机械结构的间隙配合影响刚度,推导出闭环条件下的间歇递推公式,辨析系统的间隙幅值与振动频率。利用函数描述法,应用Simulink软件仿真分析含间隙配合的横移系统中各刚度指标对其性能的影响。结果表明:提高丝杠与支撑轴承轴向刚度的等效刚度无助于系统运行稳定性的提高;滚珠螺母轴向刚度和滚珠丝杠的扭转刚度影响梳栉工作台的横移精度;推杆的轴向拉压刚度过大容易造成系统的振荡和超调。Considering the issues such as poor transverse accuracy and dynamic performance of the warp knitting machine due to the influence of mechanical stiffness,the electromechanical coupling model for electronic transverse motion was established from the perspective of global electromechanical coupling.The mechanical dynamic stiffness matrix was derived,and key parameters affecting mechanical stiffness were identified.Considering the effect of the clearance fit on the stiffness of the mechanical structure,the intermittent recurrence formula under the closed-loop condition was derived,and the clearance amplitude and vibration frequency of the system were analyzed.By using function description method,Simulink software was used to simulate the influence of stiffness indexes on the performance of transverse moving system with clearance fit.The results show that increasing the equivalent axial stiffness of the lead screw and the support bearing in the axial direction does not contribute to the improvement of the system's operational stability.The axial stiffness of ball nut and the torsional stiffness of ball screw affect the transverse accuracy of comb table.The excessive axial tensile and compressive stiffness of the push rod is easy to cause oscillations and overshoot of the system.

关 键 词：经编机 横移系统 机械刚度 间隙 

分 类 号：TS183.3[轻工技术与工程—纺织材料与纺织品设计]