牵引罗拉稳定纱线张力的作用机制  

Mechanism analysis of yarn tension stabilization using pulling rollers

作　　者：丁彩红[1] 唐军[1] 

机构地区：[1]东华大学机械工程学院,上海201620

出　　处：《纺织学报》2010年第2期110-114,共5页Journal of Textile Research

基　　金：上海市自然科学基金资助项目(05ZR14004)

摘　　要：由于地毯簇绒机簇绒过程中纱线张力的波动将影响簇绒地毯毯面质量,所以纱线张力的稳定十分重要。本文推导出纱线进出牵引罗拉的张力公式,得出牵引罗拉调节张力的作用机制为:牵引罗拉运动可以看成是由多个圆柱形罗拉的转动与平动的复合,其在转动过程中与纱线接触的齿数会发生变化,进而引起纱线包角的变化,从而导致纱线张力的变化。应用三角几何方法,推导出纱线总包角与牵引罗拉中心距的关系式,应用MathCAD软件计算各个参量变化时的包角α。通过计算分析,找出牵引罗拉调节张力的理论依据,为工程实践提供了参考。In carpet tufting process,the fluctuation of yarn tension is the main reason that causes uneven of carpet surface,so it is very important to stabilize the yarn tension.The expression equation of yarn tension is deduced when the yarn passing through the pulling roller and the mechanism of adjusting yarn tension by pulling rollers is got as follows： the pulling rollers can be viewed as a combined motion composed of many small cylindrical rollers rotational and translational movement and the contacting number of teeth with yarn keeps changing during the rotation of pulling rollers.Thus,wrap angle of yarn on the pulling rollers will change,which results in the change of yarn tension.Then,the relation between the total wrap angle and the center-to-center distance of two rollers is deduced with triangular geometry method,and the total wrap angle α varying with changing parameters is computed by using MathCAD software.Finally,through computation and analysis,the theoretical principle for adjusting yarn tension using pulling rollers is determined.This study will provide a reference for engineering practice.

关 键 词：牵引罗拉 纱线包角 纱线张力 地毯簇绒机 

分 类 号：TS103.74[轻工技术与工程—纺织工程] TS103.336[轻工技术与工程—纺织科学与工程]