纺织学报 ›› 2021, Vol. 42 ›› Issue (02): 180-184.doi: 10.13475/j.fzxb.20201008705

• 机械与器材 • 上一篇    下一篇

转杯纺纱器气流场形成机制的数值分析

史倩倩1, 王姜1, 张玉泽1, 林惠婷2, 汪军1,3()   

  1. 1.东华大学 纺织学院, 上海 201620
    2.泉州师范学院 纺织与服装学院,福建 泉州 362000
    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:2020-10-30 修回日期:2020-11-07 出版日期:2021-02-15 发布日期:2021-02-23
  • 通讯作者: 汪军
  • 作者简介:史倩倩 (1992—),女,博士生。研究方向为转杯纺气流流动和纤维运动。
  • 基金资助:
    国家自然科学基金项目(11802161);福建省自然科学基金青年创新基金项目(2020J05160)

Numerical analysis on formation mechanism of airflow field in rotor spinning unit

SHI Qianqian1, WANG Jiang1, ZHANG Yuze1, LIN Huiting2, WANG Jun1,3()   

  1. 1. College of Textiles, Donghua University, Shanghai 201620, China
    2. College of Textile and Apparel, Quanzhou Normal University, Quanzhou, Fujian 362000, China
    3. Key Laboratory of Textile Science & Technology, Ministry of Education, Shanghai 201620, China
  • Received:2020-10-30 Revised:2020-11-07 Online:2021-02-15 Published:2021-02-23
  • Contact: WANG Jun

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摘要：

转杯纺纱机在正常工作时纺纱器中的气流场主要受气泵抽气机制和转杯旋转机制影响,为研究这2种机制对纺纱器中气流场形成的作用,设计了3种对应不同作用机制的工况,且基于计算流体动力学方法对这3种工况中的流体域进行了数值模拟,并对其气流场的速度分布和压力分布特征进行了分析。数值计算结果表明:转杯纺纱器中的气流场是由抽气机制和旋转机制共同决定的;抽气机制为纤维输送提供了必要的气流速度和负压条件,旋转机制有利于纤维向转杯滑移面的顺利转移和纤维的有序排列,以及其向凝聚槽的凝聚;在这2种机制的共同作用下形成了转杯纺独特的气流纺纱环境。

关键词: 转杯纺, 气流场, 数值模拟, 抽气机制, 旋转机制, 流场分布

Abstract:

The airflow field in a rotor spinning unit under a normal working condition is mainly affected by the air suction mechanism and rotor rotation mechanism. In order to investigate the contribution of the two mechanisms to the formation of airflow field in the rotor spinning unit, three cases corresponding to different operating conditions were established for investigation, and the fluid domain in the three cases based on the computational fluid dynamics were numerically simulated. The velocity distribution and air pressure distribution of the airflow field in three cases were also analyzed and discussed. Numerical simulation results show that the airflow field in the rotor spinning unit is determined by the air suction at rotor outlet and the high-speed rotor rotation. The air suction mechanism provides the necessary air velocity and negative pressure environment for fiber's transportation. The rotation mechanism assists in smooth transfer of the fibers to the rotor slide wall, the ordered arrangement of fibers, and the accumulation of the fibers to rotor groove. It is under the joint action of the two mechanisms that a unique spinning environment where fibers are driven using air for rotor spinning is formed.

Key words: rotor spinning, airflow field, numerical simulation, air suction mechanism, rotor rotation mechanism, airflow distribution

中图分类号: 

  • TS111.8

图1

转杯纺纱器示意图"

表1

工况设计"

工况
编号		 作用机制 转杯出口
负压/Pa		 转杯旋转速
度/(r·min-1)
1 只抽不转 -5 500 -
2 只转不抽 - 30 080
3 既抽又转 -5 700 30 080

图2

计算域几何模型图"

图3

3种网格的独立性验证"

图4

计算域网格划分及边界条件示意图"

图5

3种工况下气流场速度矢量分布图"

图6

3种工况下气流场静压分布图"

图7

3种工况下y=10 mm处X轴上气压分布"

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