Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (10): 31-35.doi: 10.13475/j.fzxb.20210901308

• Textile Engineering • Previous Articles     Next Articles

Numerical simulation of airflow field in carding and trash removal zone of rotor spinning

YANG Ruihua(), HE Chuang, GONG Xinxia, CHEN Hewen   

  1. Key Laboratory of Eco-Textiles(Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122, China
  • Received:2021-09-06 Revised:2022-03-25 Online:2022-10-15 Published:2022-10-28

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Abstract:

In order to explore trash-removing characteristics of rotor spinning combing and trash removal mechanism, two types of combing and trash removal devices were selected, and a physical model was established through 3-D modeling software. Further, the distribution characteristics of air pressure, velocity and turbulent kinetic energy in these two trash removal devices were obtained and the effects of trash-removing were compared. Experiment results show that the pressure distribution in the two carding cavities of model I and model Ⅱ was negative pressure, the velocity distribution in the two carding cavities was uneven. Moreover, turbulent kinetic energy was identified at the impurity discharge port of model I, which was not conducive to the discharge of impurities. However, no change of turbulent kinetic energy was found in the trash discharge area of model Ⅱ, which was conducive to the removal of impurities. The accuracy of Fluent simulation results was validated by the spinning experiments.

Key words: rotor spinning, carding cavity, airflow field, Fluent simulation, trash removal zone

CLC Number: 

  • TS104

Fig.1

Air flow field model in rotor spinning combing impurity discharge channel Ⅰ"

Fig.2

Air flow field model in rotor spinning combing impurity discharge channel Ⅱ"

Fig.3

Model Ⅰ section(Y=16 mm). (a) Schematic diagram of section position; (b) Plane diagram"

Fig.4

Airflow pressure distribution of model Ⅰ at Y=16 mm section"

Fig.5

Airflow velocity distribution of Model Ⅰ at Y = 16 mm section"

Fig.6

Turbulent kinetic energy distribution of Model Ⅰ at Y=16 mm section"

Fig.7

Model Ⅱ section(Y=34 mm). (a) Schematic diagram of section position(Y=34 mm); (b) Plane diagram at Y=34 mm"

Fig.8

Airflow pressure distribution of model Ⅱ at Y=34 mm section"

Fig.9

Pressure distribution of air flow in carding chamber"

Fig.10

Airflow velocity distribution of model Ⅱ at Y = 34 mm section"

Fig.11

Velocity distribution of air flow in carding chamber"

Fig.12

Turbulent kinetic energy distribution of model Ⅱ at Y=34 mm section"

Fig.13

Airflow velocity vector distribution of model Ⅱ at entrance of fiber transport channel with Y = 34 mm section"

Fig.14

Turbulent kinetic energy distribution of air flow in carding chamber"

Tab.1

Comparison of 36.4 tex cotton yarn quality"

类别 1 mm和2 mm毛
羽总和/
(个·(100 m)-1)		 3 mm及以上毛
羽总和/
(个·(100 m)-1)		 条干不匀CV
值/%		 断裂强力/
cN		 断裂强度/
(cN·tex-1)		 断裂强度不匀
率/%		 断裂伸长
率/%
转杯纺乌斯特
50%指标		 6 050 1 460 13.85 462.32 12.51 7.36 6.54
模型Ⅰ纱线 2 952 961 13.54 493.40 13.53 3.78 7.42
模型Ⅱ纱线 1 587 485 12.81 505.70 13.90 2.91 8.34
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