The structure and the working theory of a new type of doublestage pump combined with diffuser and volute are introduced, which runs more steadily at high speed.

• 在泵吸入口增设消旋器,解决了泵在高转速下容易产生汽蚀等问题,又起支撑轴的作用,泵运转平稳、可靠、寿命长。