牵伸对纱条条干不匀影响的模拟研究

doi:10.13475/j.fzxb.20200901406

纺织学报 ›› 2021, Vol. 42 ›› Issue (06): 85-90.doi: 10.13475/j.fzxb.20200901406

牵伸对纱条条干不匀影响的模拟研究

贺雅勤¹, 毕雪蓉¹, 钱希茜¹, 阮钧², 郁崇文¹^,³()

1. 东华大学纺织学院, 上海 201620
2. 东华大学机械工程学院, 上海 201620
3. 东华大学纺织面料技术教育部重点实验室, 上海 201620

收稿日期:2020-09-04 修回日期:2021-02-20 出版日期:2021-06-15 发布日期:2021-06-28
通讯作者: 郁崇文
作者简介:贺雅勤(1994—),女,硕士生。主要研究方向为纺纱基础理论。
基金资助:
国家自然科学基金项目(51773034)

Simulation study on effect of drafting on sliver unevenness

HE Yaqin¹, BI Xuerong¹, QIAN Xixi¹, RUAN Jun², YU Chongwen¹^,³()

1. College of Textiles, Donghua University, Shanghai 201620, China
2. College of Mechanical Engineering, Donghua University, Shanghai 201620, China
3. Key Laboratory of Textile Science & Technology, Ministry of Education, Donghua University, Shanghai 201620, China

Received:2020-09-04 Revised:2021-02-20 Published:2021-06-15 Online:2021-06-28
Contact: YU Chongwen

摘要/Abstract

摘要：

牵伸时纤维运动引起其排列变化是影响牵伸后纱条条干不匀的关键。为探究纤维变速点分布对牵伸后纱条条干不匀的影响,通过计算机模拟了实际纱条中的纤维排列(实际纱条),分别对理想纱条和实际纱条牵伸过程中的纤维运动进行了模拟,计算了在不同变速点分布下牵伸后纱条的条干不匀,并进行实验验证。结果表明:与理想纱条相比,实际纱条的条干不匀模拟值更接近实测值,且实际纱条能体现牵伸中变速点分布对牵伸后纱条条干不匀的影响,即变速点分布越分散,牵伸后纱条条干不匀越大;实际棉条模拟牵伸后的条干不匀值与实测值变化趋势一致,可用来预测牵伸后纱条的条干不匀。

关键词: 牵伸, 变速点分布, 纤维头端, 纤维排列, 纱条条干不匀

Abstract:

In the research of sliver unevenness after drafting, the change of fiber arrangement is the key to the problem, which is caused by fiber movement. In order to explore the influence of the accelerated point distribution on the unevenness of sliver after drafting, the fiber arrangement in the measured sliver was simulated, referred to as actual sliver. The fiber movement during the drafting process in the ideal sliver and the actual sliver was simulated, respectively. The unevenness of the actual sliver after drafting with different accelerated point distribution were calculated, and experiments were carried out. The results showed that compared with the ideal sliver, the actual sliver can better reflect the influence of the accelerated point distribution on the unevenness of the sliver after drafting, and an increase in the accelerated point variance is found to associate to the increase in the sliver unevenness. The unevenness of the actual cotton sliver after simulated drafting is roughly consistent with the trend of the measured value.

Key words: drafting, accelerated point distribution, fiber end, fiber arrangement, sliver unevenness

中图分类号:

TS101.1

贺雅勤, 毕雪蓉, 钱希茜, 阮钧, 郁崇文. 牵伸对纱条条干不匀影响的模拟研究[J]. 纺织学报, 2021, 42(06): 85-90.

HE Yaqin, BI Xuerong, QIAN Xixi, RUAN Jun, YU Chongwen. Simulation study on effect of drafting on sliver unevenness[J]. Journal of Textile Research, 2021, 42(06): 85-90.

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类型	纤维平均长度/mm	纤维平均线密度/dtex	平均条干线密度/ktex	平均条干不匀率/%
生条	23.6	1.37	4.65	6.35
半熟条	23.6	1.37	5.00	6.65
熟条	25.8	1.45	4.42	5.14
不匀生条	25.2	1.74	3.90	11.50

类型	45 mm (R₁)	38 mm (R₂)	30 mm (R₃)	25 mm (R₄)	20 mm (R₅)	15 mm (R₆)	10 mm (R₇)	5 mm (R₈)
μ	1.08	2.47	3.78	5.49	9.72	11.26	12.60	16.13
σ	0.945	1.762	1.868	2.799	3.789	3.899	3.727	5.895

类型	实测不匀率/%	模拟不匀率/%
类型	实测不匀率/%	实测变速点分布	等变速点
生条喂入	10.30	4.55	4.29
	9.86	3.85	3.60
	10.20	2.88	2.56
熟条喂入	6.20	2.78	2.49
	5.90	2.75	2.46
	6.37	3.39	3.16
不匀条喂入	15.41	7.19	6.90
	10.94	3.98	3.69
	11.88	5.98	5.83
	10.38	5.19	5.04

牵伸对纱条条干不匀影响的模拟研究

Simulation study on effect of drafting on sliver unevenness

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