Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (10): 56-61.doi: 10.13475/j.fzxb.20180908906

• Textile Engineering • Previous Articles     Next Articles

Simulation and analysis of three-dimensional flow field in four-roller compact spinning system

QIAN Cheng, LIU Yanqing(), LIU Xinjin, XIE Chunping, XU Bojun   

  1. Key Laboratory of Eco-Textiles (Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122, China
  • Received:2018-09-30 Revised:2019-05-28 Online:2019-10-15 Published:2019-10-23
  • Contact: LIU Yanqing E-mail:yqljndx@126.com

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Abstract:

In order to investigate the compacting effect produced by airflow in four-roller compact spinning, the fluid dynamics model which is in the compact region of the four-roller compact spinning system was established by using ICEM CFD software. The software ANSYS Fluent Release 16.0 was adopted to calculate the flow field and characterize the airflow distribution in the compact region. The distribution of flow field and the velocity distribution rule in the compact region were also characterized. Finally different pressures in the compact region was arranged to spin yarn for testing. The results show that the slope of 6 degrees of the compact region has no effect on the horizontal static pressure at the inlet. The horizontal static pressure of the compact region is U-shaped. The effects of velocity components of different axial directions on the fiber bundles are different, and the airflow of lateral compacting direction also can twist the fiber bundles. As the static pressure increases, the breaking strength and evenness of composite yarn increase, while the breaking elongation and hairiness of composite yarn decrease.

Key words: spinning frame, four-roller compact spinning, flow field simulation, compacting device

CLC Number: 

  • TS101.2

Fig.1

Four-roller spinning drafting system"

Fig.2

Four-rollers compact area"

Fig.3

Label of suction sunken(Line 1-5)"

Fig.4

Airflow velocity profile"

Fig.5

Flow speed vector illustration of compact area. (a)Inlet surface of suction sunken; (b)Profile of suction sunken"

Fig.6

Static pressure distributions in different position of suction sunken"

Fig.7

Static pressure distributions up different areas of Line4"

Fig.8

Component velocity distributions in suction sunken(pressure_outlet). (a)X axial;(b)Y axial;(c)Z axial"

Fig.9

Component velocity distributions of the Line5. (a)X axial;(b)Y axial;(c)Z axial"

Tab.1

Test results of yarn properties"

编号 负压值/Pa 气流速度/(m·s-1) 强力/cN 断裂伸长率/% 3 mm以下毛羽根数 条干CV值/% 捻度/(捻·(10 cm)-1)
1 -2 800 69.8 417.2 8.19 10 421 10.44 103.2
2 -3 000 74.6 425.7 7.73 9 918 10.63 104.6
3 -3 200 79.5 428.1 7.62 9 623 10.83 105.0
4 -3 400 85.3 469.1 7.59 8 921 10.94 106.5
[1] 马晓辉, 邹小祥, 吴琼. HFJA506紧密纺加工纤维素纤维纱生产实践[J]. 江苏纺织, 2010(9):42-44.
MA Xiaohui, ZOU Xiaoxiang, WU Qiong. HFJA506 compact spinning cellulose fiber yarn production prac-tice[J]. Jiangsu Textile, 2010 (9):42-44.
[2] 邹专勇, 汪燕, 俞建勇, 等. 网格圈集聚纺纱系统三维流场表征与分析[J]. 纺织学报, 2009,30(6):24-28
ZOU Zhuanyong, WANG Yan, YU Jianyong, et al. Characterization and analysis of three-dimensional flow field in grid-ring agglomeration spinning system[J]. Journal of Textile Research, 2009,30(6):24-28.
[3] 竺韵德, 邹专勇, 俞建勇, 等. 气流槽聚型集聚纺纱系统三维流场的数值研究[J]. 东华大学学报(自然科学版), 2009,35(3):294-298.
ZHU Yunde, ZOU Zhuanyong, YU Jianyong, et al. Numerical study of three-dimensional flow field in the agglomeration spinning system with air channel[J]. Journal of Donghua University(Natural Science Edition), 2009,35(3):294-298.
[4] THUM R. Suessen elite spinning system for long and short staple fibers[J]. Textile World, 2000(4):38-39.
[5] 沈晓来. 立达K44紧密纺装置主要元件的作用[J]. 上海纺织科技, 2005,33(2):27-28.
SHEN Xiaolai. The role of the main components in the Lida K44 compact spinning unit[J]. Shanghai Textile Science & Technology, 2005,33(2):27-28.
[6] CHENG Longdi, ZOU Zhuanyong, YU Jianyong, et al. Study of compact spun yarns[J]. Textile Research Journal, 2003(4):12-14.
[7] 杨士奎, 谢春萍, 苏旭中, 等. 四罗拉紧密纺精梳棉纱关键工艺优化设计[J]. 棉纺织技术, 2010,38(4):15-18.
YANG Shikui, XIE Chunping, SU Xuzhong, et al. Optimization design of key process for four roller compact spinning carded yarn[J]. Cotton Textile Technology, 2010,38(4):15-18.
[8] 杨兴, 汪军, 杨建平. 集聚纺集聚区须条的运动分析[J]. 东华大学学报(自然科学版), 2003,29(5):1-4.
YANG Xing, WANG Jun, YANG Jianping. Kinematic analysis of agglomeration zone[J]. Journal of Donghua University(Natural Science Edition), 2003,29(5):1-4.
[9] 周水平, 汪军, 杨建平. 集聚纺集聚区须条变截面部分的力学分析[J]. 东华大学学报(自然科学版), 2005,31(2):20-24.
ZHOU Shuiping, WANG Jun, YANG Jianping. Mechanical analysis of variable cross section in agglomeration zone[J]. Journal of Donghua University(Natural Science Edition), 2005,31(2):20-24.
[10] 周水平, 汪军, 杨建平. 集聚纺集聚区须条等截面部分的力学分析[J]. 东华大学学报(自然科学版), 2005,31(3):10-14.
ZHOU Shuiping, WANG Jun, YANG Jianping. Mechanical analysis of changless section fiber band in compact field of compact spinning[J]. Journal of Donghua University(Natural Science Edition), 2005,31(3):10-14.
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