The influence of interstage leakage among impellers to the flow state outside the front and back shrouds of the multistage centrifugal pump was studied. The velocity distribution of inner flow and the value of axial force were measured by the experimental device of centrifugal pump. The results indicated that the rotation velocity of the liquid outside the front shroud was 0.5 times larger than the angular velocity of impellers, and the velocity outside the back shroud was 0.5 times less than the angular velocity. The pressure outside the front shroud was lower than the value outside the back shroud. The actual value of axial force was lower than the calculated. And the formula of the axial force should be modified.
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牟介刚,李思,郑水华,金建波,苏苗印,赵永攀.多级离心泵叶轮级间泄漏对轴向力的影响[J].农业机械学报,2010,41(7):40-44. Interstage Leakage on the Axial Force of the Multistage Centrifugal Pump[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(7):40-44.