新型矿用排水泵入口段口环密封结构优化研究

以某型号矿用排水泵入口段口环密封为研究对象,采用数值仿真方法，研究排水泵迷宫密封内部流动特征，分析迷宫密封结构尺寸与形状对其泄漏量的影响。结果表明:迷宫的间隙尺寸对密封性能的影响最大，间隙宽度和节流齿宽度的变化将导致泄漏量的大幅变化；相比直齿结构迷宫密封，异形齿结构有利于湍流充分发展，从而可以提高密封性能；通过分析复杂迷宫密封的内部流场，得到适用于排水泵的优化的迷宫密封结构。

Optimum Design of Choma Sealing Structure in Entrance Section of Mine Drainage Pump

Taking the choma seal in the entrance section of mine drainage pump as research object,the flow characteristics of internal flow field of labyrinth seal were analyzed by numerical simulation method.The effects of structure sizes and sharps of labyrinth seal on the leakage were analyzed.The results show that the effect of labyrinth clearance size on sealing performance is the largest,the changes of clearance width and throttling tooth width will lead to the large change of leakage.Compared with the labyrinth seal of straight tooth,the labyrinth seal of special shaped tooth can improve the sealing performance,for its structure is conducive to the sufficient development of turbulence.The optimum structure of labyrinth seal for the drainage pump was got by studying the complex internal flow of labyrinth seals.