蜗壳是螺旋轴流式气液混输泵的重要部件。在低速和高速工况下 ,对石油大学 (北京 )设计的这种混输泵的蜗壳 ,分别进行了泵外特性和蜗壳压力测量 ,以及蜗壳内气液两相流动情况分析的实验研究。实验结果表明 ,蜗壳能适应低速工况下纯液和气液混输的需要 ,设计流量下的运行效率较高 ;在高速工况下 ,蜗壳产生较大的水力损失 ,表明蜗壳尺寸偏小 ,不能适应高速运行工况 ,应设计较大尺寸的蜗壳。混输泵蜗壳和普通泵蜗壳在作用和设计上存在较大差别 The volute is an important part of the spiral axial-flow gas-liquid mixing pump. Under the conditions of low speed and high speed, the experiments of the external pressure and pressure of the pump and the analysis of gas-liquid two-phase flow in the volute were carried out on the volute of the hybrid pump designed by the University of Petroleum (Beijing) the study. The experimental results show that the volute can adapt to the needs of pure liquid and gas-liquid mixed transportation at low speed, and has high operation efficiency under design flow rate. Under high speed, the volute has larger hydraulic loss, indicating that the volute size is biased Small, can not adapt to high-speed operating conditions, the volute should be designed larger size. Mixed pump volute and ordinary pump volute in the role and design there is a big difference