本文采用在叶轮轮盘与泵壳体组成的间隙流场内插入—自由旋转圆盘的方法,来降低流体机械内轮盘摩擦损失.通过对插入圆盘前、后轮盘摩擦损失实验研究,结果表明:在插入圆盘前,叶轮转速、轮盘与泵壳体间轴向距离S增大会增加圆盘摩擦损失;在间隙流场内插入圆盘后,作用在叶轮轮盘的摩擦损失将减小;同时测定了圆盘转速、插入盘轴向位置对降阻影响.最后,对减阻的机理进行初步分析. In this paper, a method of inserting a free-rotating disk into the gap flow field consisting of the impeller disk and the pump shell is adopted to reduce the friction loss of the inner disk of the fluid machine.Through the experimental study on the friction loss of the front and rear disk inserted into the disk, The results show that the impeller speed and the axial distance S between the roulette and the pump casing increase the disc friction loss before the disc is inserted. After the disc is inserted into the gap flow field, the friction loss acting on the impeller disc will And the influence of disk rotation speed and axial position of insertion disk on drop resistance was also measured.Finally, the mechanism of drag reduction was analyzed preliminarily.