内装式矿用隔爆多级潜水泵设计

介绍了一种内装式结构的矿用潜水泵的设计方法,分析了底座进水孔、泵盖高度、涡室流道及泵出水口位置对泵水力性能的影响,并优化了这些过流部件的设计;叶轮设置浮动密封环,减少了密封环的泄漏量,可提高泵的容积效率;主轴底端设置导轴承,可减少转子的径向跳动;油室内特殊设计了一种双端面机械密封,保证双端面机械密封摩擦副端面比压始终大于弹簧比压.BQW80-180-90型3级叶轮矿用潜水泵的试验结果表明：设置浮动密封环与导轴承后,泵的流量及扬程参数稳定,整机效率比MT/T 671-2005规定值高8%,与普通橡胶波纹管的双端面机械密封相比,新的密封更加可靠.研究表明：新设计的矿用潜水泵效率指标理想,泵故障率大大降低,可靠性良好.

Design of multistage flameproof submersible pumps with inner motor for coal mine

Design methods of a multistage flameproof submersible pump for coal mine were introduced in details. The effects of base holes, cover height, volute flow passage and outlet position on pump hydraulic efficiency were analyzed, and the optimizations for those parts were done. Pump′s volumetric efficiency can be improved by using floating rings. Rotor′s radical flop is limited through setting a sliding bearing. Pressure at friction-pair of dual-end face mechanical seal is always larger than spring′s origin force through static ring optimization in oil chamber. The BQW80-180-90 pump experiment results show that the pump can run quietly due to the floating rings and sliding bearing, and its efficiency is increased by about 8% compared to that of MT/T 671-2005. Meanwhile the new mechanical seal is more reliable than the old one. To sum up, the new design of this kind pump has high efficiency and reliability.