四罗拉集聚纺纱系统纤维运动数值模拟与分析

doi:10.13475/j.fzxb.20190304207

纺织学报 ›› 2020, Vol. 41 ›› Issue (03): 39-44.doi: 10.13475/j.fzxb.20190304207

四罗拉集聚纺纱系统纤维运动数值模拟与分析

钱成, 刘燕卿(), 刘新金, 谢春萍, 苏旭中

生态纺织教育部重点实验室(江南大学), 江苏无锡 214122

收稿日期:2019-03-13 修回日期:2019-11-07 出版日期:2020-03-15 发布日期:2020-03-27
通讯作者: 刘燕卿
作者简介:钱成(1994—),男,硕士生。主要研究方向为流场分析与纤维力学研究。
基金资助:
国家重点研发计划项目(2017YFB0309200);江苏省自然科学基金项目(BK20170169)

Simulation and analysis of trajectory of fibers in a four-roller compact spinning system

QIAN Cheng, LIU Yanqing(), LIU Xinjin, XIE Chunping, SU Xuzhong

Key Laboratory of Eco-Textiles(Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122, China

Received:2019-03-13 Revised:2019-11-07 Online:2020-03-15 Published:2020-03-27
Contact: LIU Yanqing

摘要/Abstract

摘要：

为深入了解四罗拉集聚纺纱系统的集聚机制,对四罗拉集聚纺纱系统的关键部件进行实际测量来构建物理模型,通过Fluent16进行流场模拟获得了集聚区的气流速度分布场,然后用微元法建立纤维的动力学模型,并使用MatLab编辑动力学方程模拟不同状态下单纤维的运动轨迹。研究结果表明:集聚区入口处纤维向中心汇集输出,纤维在横向集聚方向上有较大的横向位移;单纤维的运动轨迹具有规律性,但中间微元时间段的位移具有随机性,纤维在气流力和摩擦力的共同作用下产生抱合;随着负压值的增大,纤维抱合作用增强,但负压值过大,会使纤维内外转移减弱,降低纤维的抱合程度。

关键词: 四罗拉纺纱系统, 集聚纺, 动力学模型, 纤维运动

Abstract:

In order to simulate the trajectory of fibers in four-roller compact spinning, the critical components of four-roller compact spinning were measured to build a physical model. Fluent16 which can calculate the flow field was used to acquire the airflow distribution in the aggregation region. The dynamic model of fiber was established by infinitesimal method, and MatLab was used to edit the dynamic equation to simulate the trajectory of a single fiber under different conditions. The results show that the fibers at the entrance of aggregation region are compacted and output to the center. The track of single fiber is regular, but the displacement of the fiber in the intermediate micro-element period is random. The fibers hold together under the action of airflow force and friction. With the increase of the negative pressure value, the fibers hold together more tightly; but when the negative pressure is too high, the internal and external transfer of fibers is weakened, thus weakening the cohesive force among the fibers.

Key words: four-roller spinning system, compact spinning, dynamic model, movement of fibers

中图分类号:

TS101.2

钱成, 刘燕卿, 刘新金, 谢春萍, 苏旭中. 四罗拉集聚纺纱系统纤维运动数值模拟与分析[J]. 纺织学报, 2020, 41(03): 39-44.

QIAN Cheng, LIU Yanqing, LIU Xinjin, XIE Chunping, SU Xuzhong. Simulation and analysis of trajectory of fibers in a four-roller compact spinning system[J]. Journal of Textile Research, 2020, 41(03): 39-44.

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纤维直径d/mm	0.022
空气密度ρ_a(25 ℃)/(kg·m^-3)	1.165
纤维密度ρ_f/(g·cm^-3)	1.54
流场修正系数k	0.2
纤维间的摩擦因数μ	0.2
空气黏度μ_a(25 ℃)/(m²·s^-1)	16×10^-6
时间间隔数	1 000
圆弧半径r/mm	18

编号	负压值/Pa	气流速度/(m·s^-1)	3 mm以下毛羽个数(200 m)
1	-2 800	68.9	10 323
2	-3 100	72.5	9 928
3	-3 400	75.9	9 625
4	-3 800	80.3	9 824

四罗拉集聚纺纱系统纤维运动数值模拟与分析

Simulation and analysis of trajectory of fibers in a four-roller compact spinning system

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