喷气织机引纬筘槽内气流状态的测试分析

 为了解辅助喷嘴的喷射区间长度、辅助喷嘴的喷向角、辅助喷嘴的供气压力等因素与引纬筘槽内气流流速的关系，采用毕托管，通过自行设计的测量装置对引纬筘槽内的气流速度进行测量，同时研究了不同供气条件下气流速度的变化情况。研究结果表明：引纬槽内的气流速度变化剧烈，并按辅助喷嘴间距周期性波动；供气压力过小时筘槽内气流速度无法达到引纬要求；在引纬槽的同一截面上，不同的测量点具有不同的速度，纬纱在不同测量点受到的作用力也不一样。

Test and analysis on airflow state in reed groove of air jet looms

The air speed in reed groove is tested to analyze the influence of process parameters on the airflow field in reed groove. The relation between air speed and spray length of auxiliary nozzle, spray angle of auxillary nozzle or supply pressure of auxilliary nozzle is investigated. In this article, the pitot tube is applied to test the air speed in reed groove by an instrument designed by the researchers themselves. At the same time, the change of air speed with the supply pressure is also studied. The results indicated that the air speed in reed groove fluctuates drastically and periodically with the distance of auxiliary nozzles. When the supply pressure is too low, the air speed in reed groove could not satisfy the weft insertion requirement. In the same section of reed groove, velocity varies with testing positions and so does the force acting upon the weft.