环锭纺纱气圈顶端张力To的分析
2015-05-27 15:44:35   来源：   评论：0 点击：

摘要：为了弄明白环锭细纱机纺纱张力T_o与有关因素的关系，从三维的气圈方程求得，仅计离心力时气圈纱曲线近似是平面上正弦曲线，定义域为［0，π］；再从三维的气圈张力参数p计算式求得二维的气圈张力参数p_z和p_p,确定气圈纱曲线形状和张力，纱张力T_o=mω²p_p²。在一落纱期间，纱张力T_o主要随气圈高度h和卷绕直径d_w变化。实例计算结果表明，筒管底部直径放大使做管底时纱张力T_o降低；做管身时纱张力T_o逐渐增大，做管顶时纱张力T_o迅速增至最大。恒张力纺纱纱中张力T_o不变，它要求锭速ω做调节变化，锭速ω随着气圈高度h变化作调节称为基本调节，其规律是hω为常数；随卷绕直径d_w变化作调节称为逐层调节，其规律是为常数，最后按实例草拟锭速变化曲线图。
关键词：环锭纺；锭速变化规律；纱张力；控制；气圈
中图分类号：TS103.11⁺5      文献标志码：A      文章编号：1001-9634(2015)03-0001-07
 
收稿日期：2014-11-11
作者简介：周炳荣(1934—)，男，东华大学教授。
  Abstract:To make clear the relationship between the balloon tension T_o and the involved factors,this paper shows that the yarn-curve for balloon is nearly a sinus in definition domain ［0，π］,on analyzing the 3D equation for balloon by only considering the centrifugal force,and finds the tension parameter p_z and  p_p of 2D balloon deduced from the formula of tension parameter p.So the yarn-curve shape and balloon tension can be determined,consequently with the yarn tension T_o = mω²p_p².The yarn tension T_o  follows changes of balloon height h and winding diameter d_w during spinning in one lift.An example with calculating shows that as the bobbin base diameter amplifies,the yarn tension T_o of the bobbin drops in bottom,grows steadily in middle,and rises rapidly in top.In the spinning with constant tension,the tension T_o keeps constant,which yet allows spindle speed ω variation;variation along with balloon height h called basic control,i.e.hωis const.Variation along with winding diameter d_w called layer-by-layer control,i.e. is const.In the end of the paper,a sketch of spindle speed variation is schemed as an example.
Key Words:ring-spinning process;the law of spindle speed variation; yarn tension;control;balloon
 
参考文献：
[1]   Grishin P.F.Balloon control[J].Platts-Bulletin，1954，8（6）：8.
[2]   А.П 拉科夫.精纺工程[M].北京：纺织工业出版社，1952：82-83.
[3]   陈人哲.纺织机械设计原理：上[M].2版.北京：中国纺织出版社，1996：303-304.
[4]  DE BARR A.E.The principles and theory of ring spinning[M].London：The Textile  Institute，1965.
[5]  周炳荣.纺纱气圈理论[M].上海：东华大学出版社，2010.

全文PDF下载地址：http://www.ctainfo.cn/uploadfile/2015/0601/20150601095440197.pdf