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为解决钻割工艺中喷嘴易堵死的难题,采用田口方法,在单因素实验的基础上,优化适合松软煤层的大直径喷嘴几何参数,以期为喷嘴设计提供参考依据。研究结果表明:出口直径、出口圆柱段长度、收缩角对出口轴心速度影响的显著性:收缩角>出口直径>出口圆柱段长度。出口直径与出口圆柱段长度、收缩角与出口圆柱段长度均存在较强的交互作用。优化后喷嘴性能得到显著改善,田口方法结合有限元方法能在较短时间内,通过少量实验,为喷嘴结构参数优化提供一种经济、可靠的解决方案。
In order to solve the problem that the nozzle is easy to be blocked in drilling process, Taguchi method was used to optimize the geometric parameters of large diameter nozzle suitable for soft coal seam based on the single factor experiment, in order to provide a reference for nozzle design. The results show that the influence of exit diameter, length of exit cylindrical section and contraction angle on exit axis speed is significant: contraction angle> exit diameter> exit cylindrical section length. There is a strong interaction between the outlet diameter and the length of the outlet cylindrical section, the contraction angle and the length of the outlet cylindrical section. Optimized nozzle performance has been significantly improved, Taguchi method combined with the finite element method in a short period of time, through a small amount of experiments, to optimize the nozzle structure parameters to provide an economical and reliable solution.