G30—10水轮泵是一种高水头高扬程水轮泵。它的研制是水轮泵向特高扬程领域发展的又一次尝试。该机的研究经历了第一代样机(简称原样机)和第二代样机,即改进设计样机(简称改进样机)两个阶段。本文试图通过对原样机汽蚀问题的分析和改进研究结果来阐述水轮泵的实际效率与设计效率的偏差及尾水管的改进对水轮泵汽蚀系数的影响,并由此得出ZD440转轮应用于水轮泵时吸出高度的计算方法。 G30-10 turbine pump is a high head high-lift pump. Its development is another attempt to develop the water pump to the special high lift. The research of this machine has gone through the first generation of prototype (referred to as the original prototype) and the second generation of prototype, that is to improve the design prototype (referred to as improved prototype) two stages. This paper attempts to explain the problem of cavitation of the original prototype machine and improve the research results to explain the actual efficiency of the hydraulic pump and design efficiency of the deviation and the improvement of the draft tube on the water pump cavitation coefficient, and draw ZD440 turn Calculation of the suck-off height when a wheel is applied to a water wheel pump.