注水工艺需要高压高效率的离心泵。要达到这种要求,目前广泛应用的低比转数注水泵应从加大参数,提高排量,选用大的出口角和小的入口直径等方面入手加以改进。同时扩大导叶扩散段进出口面积,使叶轮和导叶达到最佳配合,从而获得效率高,高效范围宽的水力元件。从以上观点出发,我们试制了五组水力元件,通过实验台试验,从中选出了效率较高的元件。 Water injection process requires high pressure and high efficiency centrifugal pump. To achieve this requirement, the currently widely used low specific speed water injection pump should be improved by increasing the parameters, increasing the displacement, selecting large exit angles and small inlet diameters. At the same time, the area of ​​inlet and outlet of diffuser of guide vane should be expanded so that the impeller and guide vane will be optimally matched to obtain the hydraulic components with high efficiency and wide range of efficiency. From the above point of view, we have trial production of five sets of hydraulic components, through the test bench test, from which to choose the more efficient components.