FDY吸丝枪喷嘴结构设计

DESIGN OF THE NOZZLE OF A FDY YARN SUCTION GUN

吸丝枪是一种以压缩空气为动力的流体机械,其空气流路直接影响到流体分布,从而影响到吸丝枪的性能。为了阐明喷嘴结构对吸丝枪性能的影响,设计制作了16种喷嘴,测定了其吸丝张力、能耗,分析了吸丝效率,得到了最佳的喷嘴结构参数:压缩空气进入孔孔数N=3、孔径d=1.6 mm、角度φ=150°、喷嘴扩大角角度θ=60°。结果表明:喷嘴结构设计中N、d、φ对吸丝枪性能有显著影响;采用吸丝效率(吸丝张力与空气流量比值)来评价吸丝枪性能更加合理。

Yarn suction gun is a kind of fluid machinery using compressed air as power. Therefore, the airflow geometry in the gun has a significant influence on the airflow distribution, which affects the performance of yam suction gun. To elucidate the effect of nozzle structure on the performance of yarn suction gun, we de- signed 16 nozzles, determined the yarn suction force, energy consumption and analyzed the yarn suction effi- ciency. The optimal geometrical parameters of the nozzle are obtained as follows： the number of compressed- air inflow tube N = 3, the diameter of compressed - air inflow tube d = 1.6 ram, the compressed-air inflow angekp = 150~ and the passage diverging angel 0 = 60~. The structure of nozzle considerably affects the per- formance of yarn suction gun. The suction efficiency, the ratio of yarn suction force to air flow rate, is more rational to be used to evaluate the yarn suction performance.