Research on the response characteristics of solenoid valve of the air-jet loom by simulation

2013 ◽  
Vol 22 (6) ◽  
pp. 606-612 ◽  
Author(s):  
Yuzhen Jin ◽  
Ruoyu Deng ◽  
Yingzi Jin ◽  
Xudong Hu
Keyword(s):  
Solenoid Valve ◽  
Response Characteristics ◽  
Air Jet ◽  
Air Jet Loom

Discussion on Weft Insertion Processing Parameters of Air-Jet Loom

2014 ◽  
Vol 556-562 ◽  
pp. 1005-1008 ◽  
Author(s):  
Jin Ming Lu
Keyword(s):  
High Pressure ◽  
Low Pressure ◽  
Processing Parameters ◽  
Solenoid Valve ◽  
Time Parameter ◽  
Release Time ◽  
Air Jet ◽  
Close Time ◽  
Air Jet Loom

Configuration methods of weft insertion processing on air jet loom were discussed. Take GA708-280 Air Jet Loom as an example, configuration methods of weft insertion processing was analyzed, including open and close time of main nozzle and additional nozzle solenoid valve, air jet pressure of main nozzle and additional nozzle, release time of accumulator retaining pin. It is considered that jet weft time parameter of air jet loom should be set according to fabric weave and variety. Air jet pressure should be set according to method of high pressure for example 4.0×105Pa to low pressure gradually.

scholarly journals Numerical calculation and experimental study on response characteristics of pneumatic solenoid valves

2019 ◽  
Vol 52 (9-10) ◽  
pp. 1382-1393 ◽  
Author(s):  
Xiang Zhang ◽  
Yonghua Lu ◽  
Yang Li ◽  
Chi Zhang ◽  
Rui Wang
Keyword(s):  
Switching Time ◽  
Response Characteristic ◽  
Test System ◽  
Solenoid Valve ◽  
Circuit Model ◽  
Inlet Pressure ◽  
Driving Voltage ◽  
Response Characteristics ◽  
Aerodynamic Model ◽  
Set Up

In order to analyze the response characteristics of the solenoid valve in depth, the flow field of the solenoid valve is analyzed by means of the computational fluid dynamics, and the aerodynamic parameters that are difficult to be obtained by the traditional methods are obtained with software FLUENT. We also set up the mathematical model of the solenoid valve, including the aerodynamic model, the circuit model, the magnetic circuit model and the mechanical motion model. The calculation is completed in the Simulink, and the results of the calculation are analyzed. A set of the solenoid valve response characteristic test system is built, and the response characteristic parameters such as response time and maximum action frequency of the solenoid valve are tested. The experimental results are verified by comparing them with the simulation results. The final result shows that the response characteristics are basically irrelevant to the action frequency at a suitable working frequency. The open switching time of the solenoid valve decreases with the increase in the inlet pressure and the driving voltage and increases with the increase in the number of coil turns. The close switching time increases with the increase in the inlet pressure, the driving voltage and the number of coil turns.

scholarly journals Air Stream ejected from Sub-nozzles of Air Jet Loom

1996 ◽  
Vol 42 (3-4) ◽  
pp. 80-85 ◽  
Author(s):  
Ryuji Shintani ◽  
Ikuei Donjou ◽  
Kazuhide Chikaoka ◽  
Atsushi Okajima
Keyword(s):  
Air Jet ◽  
Air Stream ◽  
Air Jet Loom

scholarly journals An Investigation of Air Consumption of Air-Jet Loom

2021 ◽  
Vol 11 (1) ◽  
pp. 1-14
Author(s):  
Mohammad Mobarak Hossain ◽  
Habiba Alaya Suchona ◽  
Mst Tanzina Nasrin ◽  
Imran Hossain
Keyword(s):  
Air Jet ◽  
Air Jet Loom

Investigation into the Fabric Handle which Weaved on Air-Jet Loom by Bundle Yarn Filling Insertion Technology

2013 ◽  
Vol 821-822 ◽  
pp. 360-364
Author(s):  
Yi Weng ◽  
Hong Jun Cui
Keyword(s):  
Bending Properties ◽  
Air Jet ◽  
Fabric Handle ◽  
Air Jet Loom

Aimed to investigate the fabric handle which weaved with bundle yarn filling insertion technology, the properties of interlace resistance, flatness, friction, bending and compressing are tested. And 2 fabrics with the same size which weaved by different weaving methods on air-jet loom are analyzed contrastively. The result shows that the double wefts satin fabric which weaved with bundle yarn filling insertion technology had the adjacent interweave resistance, touched more flat and stiff compared to which weaved by traditional weaving technique. It was smoother and had better bending properties at warp orientation. But along weft orientation, it was rougher and had less bending properties.

Analysis of the characteristics of air–yarn coupling movement in the profiled reed groove of an air-jet loom

2021 ◽  
pp. 004051752110569
Author(s):  
Yuzhen Jin ◽  
Hailang Xiong ◽  
Jingyu Cui
Keyword(s):  
Numerical Results ◽  
Weft Yarn ◽  
Valuable Insight ◽  
Arbitrary Lagrangian Eulerian ◽  
Air Jet ◽  
Gap Ratio ◽  
Gas Consumption ◽  
Simulation Results ◽  
Gas Leaks ◽  
Air Jet Loom

The movement characteristics of yarn in the profiled reed groove of an air-jet loom can have a great impact on the performance of the fabric. Unstable yarn movement tends to lead to weft defects, as short wefts or weft breaks may occur, which could deteriorate the quality of the final fabric. In this paper, the characteristics of the yarn movement in a profiled reed groove are numerically studied. The arbitrary Lagrangian–Eulerian method is used to solve the two-way airflow–yarn interaction and the yarn is simulated with the ball–socket model. A fluctuation ratio is defined to characterize the unsteadiness of the yarn movement. Our simulation first investigates the effect of the gap ratio of the profiled reed groove (β) on the yarn movement then compares the movements of different yarn kinds. The simulation results indicate that a larger β not only decreases gas leaks (thus saves gas consumption), but also stabilizes the yarn movement. Our simulation results also show that the movement of the yarn of polypropylene is more stable than the other two weft-yarn materials. An experiment is also conducted to validate our numerical results, which shows a favorable agreement between them. Our numerical results of the yarn movement in the profiled reed groove can provide a valuable insight into the optimization of the weft insertion system of the air-jet loom.

Optimization of fluid characteristics in the main nozzle of an air-jet loom

2021 ◽  
pp. 004051752110395
Author(s):  
Xinlei Huang ◽  
Lee Michael Clemon ◽  
Mohammad Saidul Islam ◽  
Suvash C. Saha
Keyword(s):  
Fluid Dynamic ◽  
Three Dimensional ◽  
Sudden Expansion ◽  
Dynamic Features ◽  
Original Design ◽  
Flow Models ◽  
Air Jet ◽  
Acceleration Tube ◽  
Air Jet Loom ◽  
Fluid Characteristics

As part of the propulsion system, the fluid dynamic features of the main nozzle can immediately affect the stability and efficiency of an air-jet loom. This study aims to optimize the fluid characteristics in the main nozzle of an air-jet loom. To investigate ways of weakening the effect of airflow congestion and backflow phenomenon occurring in the sudden expansion region, the computational fluid dynamics method is employed. Three-dimensional turbulence flow models for a regular main nozzle and 12 prototypes with different nozzle core tip geometry are built, simulated, and analyzed to get the optimum performance. Furthermore, a set of modified equations that consider the direction of airflow are proposed for better estimation of the friction force applied by the nozzle. The result shows that the nozzle core tip's geometry has a significant influence on the internal airflow, affecting the acceleration tube airflow velocity, turbulence intensity, and backflow strength of the sudden expansion region, and other critical fluid characteristics as well. Several proposed models have succeeded in reducing the backflow and outperforming the original design in many different aspects. Models A-60 and C-P, in particular, manage to increase the propulsion force by 37.6% and 20.2% in the acceleration tube while reducing the maximum backflow by 57.1% and 52.2%, respectively. These simulation results can provide invaluable information for the future optimization of the main nozzle.

Flow Characteristics of the Main Nozzle in an Air-Jet Loom

1994 ◽  
Vol 64 (2) ◽  
pp. 88-100 ◽  
Author(s):  
Minoru Ishida ◽  
Atsushi Okajima
Keyword(s):  
Flow Characteristics ◽  
Air Jet ◽  
Air Jet Loom
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