纺织学报 ›› 2018, Vol. 39 ›› Issue (07): 122-129.doi: 10.13475/j.fzxb.20170707608

• 机械与器材 • 上一篇    下一篇

气动折入装置异向射流场中纱线的运动规律

  

  • 收稿日期:2017-07-21 修回日期:2018-04-12 出版日期:2018-07-15 发布日期:2018-07-16

Movement rule of yarn in incongruous jet flow with pure pneumatic tucker

  • Received:2017-07-21 Revised:2018-04-12 Online:2018-07-15 Published:2018-07-16

摘要:

为提高纯气动毛边折入装置的折入效率以及稳定性,对纯气动毛边折入装置的折入机制进行研究,建立纯气动折入装置二维纱线气流场流固耦合模型,对不同长度的纱线线头整个折入过程进行流固耦合仿真。对比实验中不同长度的纱线线头最终的折入状态,分析纱线与斜吹、折入气流场之间的相互作用以及纱线在该气流场中的运动规律。在仿真模拟中,斜吹气流作用在纱线线头上时,驱使线头向- y 方向移动;当纱线线头弯曲到一定程度时,开启折入气流,关闭斜吹气流,使纱线头端开始向- x 方向移动,并完成折入过程;随着长度的减小,纱线线头折入难度逐步加大。结果表明:在空间异向射流气流场的作用下,长度为10 mm的纱线可在5.7 ms内完成折入过程,可用于转速为800 r/min 的无梭织机的光边处理。

关键词: 毛边折入装置, 光边处理, 斜吹气流, 折入气流, 流固耦合

Abstract:

In order to improve the folding efficiency and stability of a pure pneumatic tucker,invagination theory of a pure pneumatic tuker was studied, and a 2 - D yarn-airflow field coupling model with a pure pneumatic tucker was established to simulate the folding process of the length of 10 mm yarn. The final folding process of yarnin the comparison experiment could be used to analyze interaction of yarn and airflow field and comprehend yarn's mowement rule under the oblique and folding airflow. In the simulation, the oblique airflow has an effect on the yarn and drives yarn to move to the direction of - y. When the yarn is bent to a certain degree, the folding airflow is opened, the oblique air flow is closed and driven yarn moves to the direction of - x, then the folding is finished. The results show that with the function of incongruous jet flows field, the 10 mm yarn can complete the folding process within 5.7 ms, which can be used for the optical edge processing of the shuttleless loom with the rotation speed of 800 r/min.

Key words: tucker, optical edge processing, oblique airflow, folding airflow, fluid-structure interaction

[1] 包西平 刘宜胜 吴震宇. 折入孔位置对纯气动毛边折入装置流场的影响[J]. 纺织学报, 2016, 37(08): 125-131.
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