转杯纺旁路通道设计对成纱质量的影响

doi:10.13475/j.fzxb.20181007006

摘要/Abstract

摘要：

为减小或消除在输纤通道入口处产生的气流漩涡以降低其对纤维形态产生的不良影响,通过在输纤通道长轴一侧设置旁路通道向输纤通道补气,并采用数值模拟方法研究设置有旁路通道的气流场分布,结合纺纱试验和纤维形态测试,研究该旁路通道对改善气流场分布及转杯成纱性能的效果。结果表明:采用旁路通道进行补气可消除输纤通道入口处的气流漩涡,提高纤维剥取区的气流速度,从而提高纤维剥离牵伸倍数;设置有旁路通道的转杯纺纱器对提高成纱断裂强度具有良好的作用,对降低凝聚槽中弯钩纤维的数量有一定的效果,说明消除气流漩涡和提高纤维剥离牵伸倍数有助于纤维形态的改善,从而提高成纱断裂强度。

关键词: 转杯纺, 输纤通道, 旁路通道, 气流, 成纱质量, 纤维形态

Abstract:

In order to reduce or eliminate the vortices generated at the transport channel inlet so as to decrease its adverse effect on fiber configuration, a bypass channel located on the extension of the long side of the transport channel was introduced as an air supply channel. The numerical simulation method was adopted to study the airflow dynamics of the modified transport channel. Combining with the spinning tests and fiber configuration tests, the effectiveness of the bypass channel in improving the airflow field and rotor spun-yarn properties was evaluated. The results show that by adopting the bypass channel, the vortices generated at the transport channel can be eliminated, and the air velocity in fiber separation area is increased, thus increasing the fiber peeling-drawing ratio. The rotor spinning machine with the bypass channel has a positive effect on improving the yarn tenacities as well as decreasing the number of hook fibers in the rotor groove. This indicates that eliminating the vortices and increasing the fiber peeling-drawing ratio are beneficial to fiber morphology, thus improving the yarn fracture strength.

Key words: rotor spinning, transport channel, bypass channel, airflow, yarn quality, fiber configuration

中图分类号:

TS104.1

林惠婷, 高备, 张玉泽, 史倩倩, 汪军. 转杯纺旁路通道设计对成纱质量的影响[J]. 纺织学报, 2019, 40(02): 153-158.

LIN Huiting, AKANKWASA Nicholus Tayari, ZHANG Yuze, SHI Qianqian, WANG Jun. Effect of bypass channel on rotor-spun yarn properties in rotor spinning[J]. Journal of Textile Research, 2019, 40(02): 153-158.

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参考文献 11

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[3]	LAWRENCE C A, CHEN K Z. A Study of the fibre-transfer-channel design in rotor-spinning: part I: the fibre trajectory[J]. Journal of the Textile Institute, 1988,79(3):367-392.
[4]	张礼会, 张百祥. 转杯纺纤维输送管道的研究[J]. 中国纺织大学学报, 1991,17(6):16-24.
	ZHANG Lihui, ZHANG Baixiang. A study of fiber transfer channel in rotor spinning[J]. Journal of China Textile University, 1991,17(6):16-24.
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[8]	KONG L X, PLATFOOT R A. Computational two-phase air/fiber flow within transfer channels of rotor spinning machines[J]. Textile Research Journal, 1997,67(4):269-278.
[9]	上海市纺织科学研究院. 气流纺纱理论与实践 [M]. 上海: 上海科学技术出版社, 1984: 35-62.
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所用原料	原料参数				纱线线密度/tex	纺纱工艺参数						温度/ ℃	湿度/ %
所用原料	纤维长度/mm	纤维线密度/dtex	条子定量/tex		纱线线密度/tex	分梳辊转速/ (r·min^-1)		转杯转速/ (r·min^-1)		引纱速度/ (r·min^-1)		温度/ ℃	湿度/ %
棉	29	1.8		4 200	34		6 500		51 000		61.11	30 ± 2	50 ± 2
棉	29	1.8		4 200	42						68.75
粘胶	38	1.67		4 312	34						60.44
棉/粘胶(50/50)	-	-		3 250	34						60.44

纺纱器类别	34 tex 棉纱	42 tex 棉纱	34 tex 粘胶纱	34 tex 混纺纱
传统	13.80	13.62	7.99	9.86
改进	15.59	15.04	8.67	10.61

纱线类别	F值	P值
34 tex棉纱	51.72	0.000
42 tex棉纱	31.67	0.000
34 tex粘胶纱	22.77	0.000
34 tex棉/粘胶混纺纱	18.34	0.000

纺纱器类别	34 tex 棉纱	42 tex 棉纱	34 tex 粘胶纱	34 tex 混纺纱
传统	14.29	13.97	14.44	17.42
改进	15.63	14.34	15.0	17.18
显著性检验	AB	AA	AA	AA

纺纱器类别	34 tex 棉纱	42 tex 棉纱	34 tex 粘胶纱	34 tex 混纺纱
传统	18	4	4	36.7
改进	2	20	8	28.89
显著性检验	AB	AA	AA	AA