基于VB的喷气织机主喷嘴结构尺寸优化

基于VB软件,将喷气织机主喷嘴内部流场建模、流场仿真计算、设计变量与优化目标关系的拟合以及遗传寻优等6个模块进行集成,开发了针对主喷嘴结构尺寸的自动优化设计平台。分析表明:喷嘴芯外端径向距离、喷嘴芯内孔半径、锥形套高度、环形气室径向高度和喉部长度对纱线所受牵引力影响较为显著;纱线在优化后的主喷嘴内部流场中所受牵引力较优化前提升了10.6%,并通过3D模型打印及优化前后的实验测量、分析,验证了优化结果的正确性,提高了主喷嘴的引纬效率。

Optimization of Structure Size for Air-jet Loom's Main Nozzle Based on VB

Based on VB software,the internal flow field modeling module in the main nozzle,flow field simulation calculation module,fitting module of design variables to design target relationship and genetic optimization module are integrated,which are used to develop the automatical design platform for its structure.The calculation results show that the radial distance of the outer end of the nozzle core,its radius of the inner hole,the length of the tapered sleeve,the radial height of the annular chamber and the length of the waiting portion have significant influence on the drag force;the drag force in the internal flow field of the optimized main nozzle is increased by 10.6%,compared to that of the original one,and the correctness of the optimization result is verified by experimentally measuring and analysing the 3D printed model,and the weft insertion efficiency of the main nozzle is also improved.