Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (02): 180-184.doi: 10.13475/j.fzxb.20201008705

• Machinery & Accessories • Previous Articles     Next Articles

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 E-mail:junwang@dhu.edu.cn

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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

CLC Number: 

  • TS111.8

Fig.1

Schematic diagram of rotor spinning unit"

Tab.1

Operating conditions design"

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

Fig.2

Dimensions of computational domain"

Fig.3

Mesh independency test for three different grid schemes: velocity magnitude. (a) Along X-axis at y=10 mm; (b) Along Y-axis in direction of center axis of transfer channel"

Fig.4

Meshed model and boundary conditions of computational domain"

Fig.5

Velocity vector distribution of airflow field in master view (a) and bottom view (b)"

Fig.6

Air pressure distribution of airflow field in case 1(a), case 2 (b) and case 3 (c)"

Fig.7

Air pressure distribution of airflow field along X at y=10 mm in 3 cases"

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