簇绒地毯织机提花装置的绕纱动态张力分析

Dynamic tension analysis on winding yarn in jacquard device of tufting carpet machine

簇绒地毯织机纱线张力是影响提花质量的关键因素,为对其进行有效控制,研究了步进电动机输入对簇绒提花装置区间绕过纱线张力的动态变化情况。首先建立提花装置步进电动机的负载模型,并分析其角频率输入对输出电磁转矩的对应关系;然后,根据米纳科夫定理的原理,建立纱线段绕过提花罗拉前后纱线动态张力模型;进一步分析了步进电动机的输入与提花装置绕纱的输出动态张力之间的数学模型,在选定提花罗拉半径、中心距、纱线包角等初始条件下,利用迭代-欧拉法分析其数值变化情况,得出角频率输入与纱线张力输出之间的定量关系,并探究不同包角对纱线动态张力的影响机制,为不同绒高的簇绒地毯甚至满幅簇绒提花地毯的制造和研究提供参考。

Tension control of carpet tufting loom yarn is a key factor influencing the jacquard quality. For the effective control on it, the paper focuses on the impact of stepper motor＇s input for the jacquard yarn tension variations. Firstly, dynamic model of the stepper motor jacquard device was created and the correspondence between the input angular frequency and the output torque was analyzed. According to the improved Euler equation, the yarn dynamic tension model was established, in which the section of yarn was around the jacquard roller. Meanwhile, the mathematical model of the stepper motor and the yarn dynamic tension model of the jacquard device were further analyzed. Under the different initial conditions of jacquard roller radius, center distance, yarn wrap angle and so on, its value changes were analyzed by the method of iteration-Euler, the quantitative relationship between the input angular frequency and the output yarn tension was derived and the effect of different corners to the dynamic tension of the yarn was researched. This is a reference to the manufacturing and research of different high pile tufted carpets and even the full-scale jacquard tufted carpet.