纱线飞行的理论分析与试验研究

RESEARCH ON WEFT VELOCITY AROUND MAIN NOZZLE

主喷嘴是喷气织机引纬系统的重要部件,将纱线速度从零提高到正常引纬速度。本文从理论上推导纱线在主喷嘴出口处速度的计算公式,通过搭建测试实验台及借助粒子图像测速技术,获得主喷嘴出口气场,实测不同纱线的飞行速度,分析比较理论值和实测值的差异,并讨论分析影响纱线飞行速度的主要因素。

The main nozzle is one of the important parts of the weft insertion system of the air-jet loom, accelerating the weft yarn velocity from 0 to normal flying status at once. In this article, a formula of weft velocity around main nozzle is educed. Then the actual test data is drawn by PIV. Comparing the theory velocity value with the actual value of different weft yarn, the factor affecting the weft yarn velocity is analyzed.