Numerical simulation on the condensing effect of suction slot in compact spinning with lattice apron

2012 ◽  
Vol 103 (10) ◽  
pp. 1116-1126 ◽  
Author(s):  
Wenliang Xue ◽  
Mengyuan Wei ◽  
Ni Zhang ◽  
Longdi Cheng
Keyword(s):  
Numerical Simulation ◽  
Compact Spinning ◽  
Suction Slot

Numerical simulation of fiber strands on condensing effect of suction slot in compact spinning with lattice apron

2014 ◽  
Vol 15 (5) ◽  
pp. 1084-1091 ◽  
Author(s):  
Chenchen Han ◽  
Mengyuan Wei ◽  
Wenliang Xue ◽  
Longdi Cheng
Keyword(s):  
Numerical Simulation ◽  
Compact Spinning ◽  
Suction Slot

Study on the model of semi-open-end twist in compact spinning with lattice apron

2020 ◽  
pp. 004051752094254
Author(s):  
Ting Fu ◽  
Yuze Zhang ◽  
Nicholus Tayari Akankwasa ◽  
Nanliang Chen ◽  
Huiting Lin
Keyword(s):  
Dynamic Model ◽  
Experimental Test ◽  
Negative Pressure ◽  
Flow Simulation ◽  
Slot Width ◽  
Arc Shape ◽  
Simulation Results ◽  
Compact Spinning ◽  
Suction Slot ◽  
Linear Shape

The twist mechanism of the fiber strand in the condensing zone in compact spinning is complex. This paper proposes a dynamic model to evaluate the additional twist of the fiber strands. Based on the flow simulation in the condensing zone, the fiber trajectory in the suction slot was simulated and obtained. Several spinning parameters such as suction slot angle, suction slot width, negative pressure, and shape of suction slot, were varied to show their effects on the additional twist. The simulation results indicated that by increasing the suction slot angle from 5° to 10° the additional twist increased significantly. Higher negative pressure also leads to an increase in the additional twist. The suction slot width has a greater effect on the fiber trajectory than on the additional twist. An arc-shape suction slot increased the additional twist compared with a linear-shape one. An experimental test conducted revealed a precise agreement with the simulation results.

Analysis of the Additional Twists on the Fiber Band in Compact Field of Compact Spinning

2011 ◽  
Vol 175-176 ◽  
pp. 380-384
Author(s):  
Jun Wang ◽  
Han Guang Liu ◽  
Jian Ping Yang ◽  
Guang Wei Chen ◽  
Ting Fu
Keyword(s):  
Mathematic Model ◽  
Factors Affecting ◽  
Tilting Angle ◽  
Compact Field ◽  
Spun Yarn ◽  
Compact Spinning ◽  
Spinning Speed ◽  
Suction Slot

Based on the analysis of the motion of fiber band in compact field, a mathematic model is proposed in this article. The factors affecting the additional twists and final twists of the compact spun yarn, such as diameter of the fiber band in the compact field, tilting angle of suction slot in profile tube and spinning speed, were discussed in detail. The validity of the model was validated by experiments.

Mechanical modeling of an arc-shaped suction slot for compact spinning and analysis of additional twists

2017 ◽  
Vol 88 (21) ◽  
pp. 2499-2505 ◽  
Author(s):  
Ting Fu ◽  
Jianping Yang ◽  
Guangwei Cheng ◽  
Nanliang Chen ◽  
Yiping Qiu
Keyword(s):  
Frictional Coefficient ◽  
Mechanical Analysis ◽  
Curvature Radius ◽  
Model Design ◽  
Mechanical Modeling ◽  
Obvious Effect ◽  
Runge Kutta Method ◽  
Compact Spinning ◽  
Suction Slot ◽  
Fibrous Strand

In this study, an arc-shaped suction slot was designed for a pneumatic compact spinning system with a lattice apron. A model was built via mechanical analysis of a fibrous strand in an arc-shaped suction slot to calculate additional twists inserted during condensing. The equations can be solved by using the Runge–Kutta method. The simulation results showed that negative pressure and frictional coefficient of the lattice apron and the fibrous strand have significant effects on additional twists of the strand in an arc-shaped slot. The curvature radius of the arc slot has some influence on the additional twists, while that of the condensing surface has no obvious effect on the additional twists. The radius of the strand may significantly influence the additional twists, but the radius of the strand itself is affected by various other factors. Spinning tests were carried out based on the model design. These results verified the additional twist model of the arc-shaped suction slot.

Investigation into four-roller compact spinning with air damper for improving yarn performance

2021 ◽  
pp. 004051752110246
Author(s):  
Yanan Yang ◽  
Xiaoxia Sun ◽  
Zhimin Li ◽  
Xinhou Wang
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Low Cost ◽  
High Grade ◽  
Spun Yarn ◽  
Potential Applications ◽  
Spinning Triangle ◽  
Yarn Hairiness ◽  
Compact Spinning

Compact spinning, as a new kind of spinning technology, has gained wide attention because of its great reduction in spinning triangle and yarn hairiness. In order to meet the demand of high-grade clothing, research on further improving the performance of compact spun yarn is the emphasis. Of all the existing compact spinning systems, the four-roller compact spinning with lattice apron is most widely used at present because of its low cost. Therefore, this paper aims to put forward a new kind of device to improve yarn performance for four-roller compact spinning systems. Related experiments have been done to verify the efficiency of the device, and the mechanism is analyzed by computational fluid dynamics. The numerical simulation shows that the device can change the direction of airflow and increase the velocity in the directions of transverse condensing and thickness. It is shown that the air damper is convenient to use and has potential applications in spinning compact yarns with better performance.

scholarly journals Numerical Simulation and Analysis of Airflow in the Condensing Zone of Compact Spinning with Lattice Apron

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Malik Y. H. Saty ◽  
Nicholus T. Akankwasa ◽  
Jun Wang
Keyword(s):  
Numerical Simulation ◽  
Flow Velocity ◽  
Negative Pressure ◽  
Vital Role ◽  
Experimental Results ◽  
Field Pattern ◽  
Airflow Field ◽  
Spinning Triangle ◽  
Compact Spinning

Abstract The airflow field pattern in the condensing zone plays a vital role in the pneumatic compact spinning, which significantly affects the yarn's qualities. This study aimed to analyze the effects of the different negative air pressures on fiber condensing in compact spinning with lattice apron using ANSYS. The results of airflow simulations reveal that by increasing the negative pressure, the flow velocity increases, leading to a more tremendous increase in the transverse condensing effects. Additionally, a better convergence led to reduced fiber width and eliminated the spinning triangle. Experimental results showed that the three yarns spun with the highest negative pressure had better strength, hairiness, and evenness than those spun with lower negative pressure.

scholarly journals Numerical Simulation of the Condensing Effect of Different Suction Slots on Fiber Strands in a Compact Siro Spinning Machine with Lattice Apron

2020 ◽  
Vol 20 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Chenchen Han ◽  
Weidong Gao ◽  
Lifen Chen
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Theoretical Basis ◽  
Morphological Changes ◽  
Geometrical Model ◽  
Single Fiber ◽  
Theory Analysis ◽  
Agglomeration Effect ◽  
Production Practice ◽  
Compact Spinning

AbstractCompact-siro spun with lattice apron combines compact spinning and siro spinning, and is widely put into practice. In this paper, compact-siro spun models with the parallel shaped slots, oblique parallel shaped slots and V-shaped slots were simulated. Based on the airflow data in the condensing zone, the geometrical model of single fiber is built, and then the trajectory of single fiber can be got. The morphological changes and movement process of fiber strands in the flow field of condensing zone were verified by the comparison experiments of yarn morphology, hairiness, tensile and evenness properties. The results showed that the V-shaped slot achieved the optimal agglomeration effect and yarn performance. The theory analysis gives foundation and explanation for the experiment, and also provides a theoretical basis for optimizing the properties of compact-siro yarn in production practice.

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