Optimization of Air Suction Gun for Textile Industry on the Basis of Fluid Engineering

1.试制了不同几何参数的吸气枪，并用该吸气枪测量了纱线吸气节流和气流流量。结果表明，吸气枪的几何形状对纱线吸力三次风量和空气质量流量的影响较小。例如，De-Laval管的压缩空气进气角和收敛角主要影响山药的吸气效率。而通道分流角度、De-Laval管喉部直径和纱线推进长度对吸纱距离影响不大。我们尝试用贵重的亚克力材料制成的吸气枪拍摄纱线在吸气枪中运行的姿势，并对这些山药姿势进行定量分析。结果表明，吸尘器的几何形状对复仇纱线直径和平均纱节距的影响，前者是草场螺旋形的直径，后者是y…螺旋形的节距更多的是ARN的姿势，被露水了。例如，压缩空气进口角度和德拉瓦尔管的喉部直径对山药的平均直径和平均山药节距有影响。而De Laval管的收敛角对山药的平均直径和螺距几乎没有影响。利用本文所建立的计算模型，对某型吸气枪内的气流进行了数值模拟。结果表明，整个吸气枪内的气流状态得到了净化。例如，(1)从山药吸入管中抽出的空气在De-Laval管和直砖中螺旋流动；(2)吸气枪中靠近管壁的气流较大，靠近管壁的气流会对纱线吸力产生影响。利用高速摄像技术，研究了在气枪中运行山药姿势的时间过程。根据计算结果对所用吸气枪的几何形状进行了优化。结果表明，随着供气压力的增加，纱线在吸气枪中螺旋运动轨迹的频率降低，纱线在吸气枪中的停留时间，即纱线在吸气枪中的停留时间，随着供气压力的增加而减少。在此基础上，总结出了基于流体工程的节能高性能吸气枪的设计手册。较少

1. We tried to manufacture the air suction guns with various geometry parameters and measured the yarn suction Throe and air mace flow rate by using then air suction guns. As the results, the effect of the air suction gun geometries on the yarn suction three and the air mass flow rate was cleared. For example, the compressed-air inflow angle and converging angle of the de Laval tube mainly had effects on the yam suction efficiency. While, the passage diverging angle, the throat diameter of the de Laval tube and the yam propulsion is the length had few effects on the yarn suction farce.2. We tried to take the photographs of the running yarn postures in an air suction gun by using the air suction gun made of dear acrylic, and analyze quantitatively these yam postures. As the results, the effect of the air suction gin geometries on the avenge yarn diameter, which is the diameter of a spiral shape of the yarn pasture and the average yarn pitch, which is the pitch of a spiral shape of the y … More arn posture, was dewed. For example, the compressed-air inflow angle and the throat diameter of the de Laval tube had the influence on the average yam diameter and the average yam pitch. While, the converging angle of the de Laval tube had hardly influence on the average yam diameter and the pitch.3. We carried out the air flow simulation in an air suction gun by using the calculation model referred to the obtained results in this study. As the results, the whole air flow states in the air suction gun were cleared. For example, (1) an air vacuumed from the yam inhalant tube flowed spirally in the de Laval tube and the straight tile, (2) The air flow in an air suction gun was large near the tube wall, and the air flow near the wall would have the influence on the yarn suction force.4. We considered the time course of running yam postures in the air suction gun by using the high speed camera. The used air suction gun geometries were optimized from the calculation results. As the results, the frequency of the trajectory of running yarn spirally in the air suction gun decreased with an increase of the supplied air pressure, and the residence time, that is the time for the running yarn to pass in the air suction gun, alga decreased with the increase tithe supplied air pressure.5. As the results, we concluded the design manuals of the air suction gun with the energy saving and the high performance based on the fluid engineering. Less