纺织学报 ›› 2022, Vol. 43 ›› Issue (10): 169-175.doi: 10.13475/j.fzxb.20210809907

• 机械与器材 • 上一篇    下一篇

异纤分拣机剔除喷管结构参数对其性能的影响

孙戬1,2(), 姜博艺1,2, 张守京1,2, 胡胜1,2   

  1. 1.西安工程大学 机电工程学院, 陕西 西安 710048
    2.西安市现代智能纺织装备重点实验室, 陕西 西安 710048
  • 收稿日期:2021-08-02 修回日期:2022-03-15 出版日期:2022-10-15 发布日期:2022-10-28
  • 作者简介:孙戬(1984—),男,讲师,博士。主要研究方向为纺织机械设计及优化、复合材料力学、工程中的有限元法等。E-mail: sunjian@xpu.edu.cn。
  • 基金资助:
    西安工程大学博士科研启动基金项目(BS201804);中国纺织工业联合会科技指导性项目(2020072);西安市现代智能纺织装备重点实验室建设项目(2019220614SYS021CG043)

Influence of different nozzle structures and parameters on nozzle performance of foreign fiber sorters

SUN Jian1,2(), JIANG Boyi1,2, ZHANG Shoujing1,2, HU Sheng1,2   

  1. 1. School of Mechanical and Electrical Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, China
    2. Xi'an Key Laboratory of Modern Intelligent Textile Equipment, Xi'an, Shaanxi 710048, China
  • Received:2021-08-02 Revised:2022-03-15 Published:2022-10-15 Online:2022-10-28

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摘要：

为探究不同异纤分拣机剔除喷管结构及其参数对喷管性能的影响,采用数值模拟分析方法,对上扩口喷嘴、下扩口喷嘴、锥形喷嘴、矩形喷嘴4种剔除喷管喷嘴结构及参数的三维流场进行模拟仿真,得到入口压力0.6 MPa下剔除喷管入口质量流率、外部空气流场域内40 mm截面位置速度及内、外喷嘴位置速度衰减曲线。结果表明:除矩形喷嘴外,其余3种喷嘴结构均能提高喷管性能,其中上扩口喷嘴喷管性能相对最优,截面平均速度和最大速度相对原始喷管最大分别提升33.4%和12.9%;下扩口喷嘴喷管相对于原始喷管截面平均速度增大11.6%,且入口质量流率减少0.17%;锥形喷嘴喷管在整体速度分布上优于上扩口喷嘴喷管,但入口质量流率上升较大。

关键词: 异纤分拣机, 喷管结构, 喷管性能, 数值模拟, 质量流率

Abstract:

In order to investigate the influence of different nozzle structures and parameters on the nozzle performance of the foreign fiber sorters, nozzles with the upper flaring, lower flaring, conic and rectangular structures and parameters were analyzed by three dimensional fluid simulations. The mass flow rate at the nozzle inlet, the velocity at the 40 mm section in the external air flow field and the velocity attenuation curves at the inner and outer nozzles were obtained under the 0.6 MPa inlet pressure. The results show that the performance of the nozzle can be improved by the three nozzle structures mentioned above except the rectangular nozzle, and the performance of the upper flaring nozzle is the best, of which the average velocity and maximum velocity are 33.4% and 12.9%, respectively, higher than that of the original nozzle. Compared with the original nozzle, the average velocity of the lower flaring nozzle is increased by 11.6%, and the inlet mass flow rate decreased by 0.17%. The overall velocity distribution of the conical nozzle is better than that of the upper flaring nozzle, but with big increase of inlet mass flow rate.

Key words: foreign fiber sorter, nozzle structure, nozzle performance, numerical simulation, mass flow rate

中图分类号: 

  • TS112.7

图1

原始喷管模型 注:图中数值单位为mm。"

图2

优化喷嘴示意图 注:图中数值单位为mm。"

图3

边界条件示意图"

图4

外部空气流场域40 mm截面位置及速度云图"

表1

上扩口喷嘴喷管截面速度及入口质量流率"

H1/mm A/mm V1/(m·s-1) V2/(m·s-1) Q/(g·s-1)
3.6 194.3 326.4 9.778
0.3 4.0 216.0 322.4 9.583
4.4 215.3 322.2 9.435
3.6 220.2 330.5 9.998
0.5 4.0 220.3 331.9 9.859
4.4 218.9 329.3 9.704
3.6 221.4 332.4 10.065
0.7 4.0 216.9 324.5 9.576
4.4 220.5 332.9 9.905
3.6 232.4 338.4 10.053
1.0 4.0 223.2 339.3 10.145
4.4 236.1 348.9 10.103

图5

上扩口喷嘴喷管H1=1.0 mm时速度曲线"

表2

下扩口喷嘴喷管截面速度及入口质量流率"

H2/mm B/mm V1/(m·s-1) V2/(m·s-1) Q/(g·s-1)
3.6 193.4 294.7 9.120
0.3 4.0 189.9 300.2 9.118
4.4 183.5 300.8 9.120
3.6 194.1 292.6 9.119
0.5 4.0 189.4 299.0 9.128
4.4 183.1 299.2 9.121
3.6 195.5 295.4 9.118
0.7 4.0 184.6 297.1 9.121
4.4 182.9 298.5 9.119
3.6 197.5 298.9 9.116
1.0 4.0 185.0 285.5 9.117
4.4 181.0 295.4 9.120

图6

下扩口喷嘴喷管H2=1.0 mm时速度曲线"

表3

锥形喷嘴喷管截面速度及入口质量流率"

C/mm V1/(m·s-1) V2/(m·s-1) Q/(g·s-1)
3.6 218.2 321.1 10.267
4.0 224.2 332.4 10.560
4.4 225.5 335.4 10.747

图7

锥型喷嘴喷管截面中心线位置的速度分布曲线"

表4

矩形喷嘴喷管截面速度及入口质量流率"

K值 V1/(m·s-1) V2/(m·s-1) Q/(g·s-1)
1 167.2 316.5 9.137
2 167.8 317.5 9.163
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