Jet type self-priming centrifugal pump is a new structure of the self-priming centrifugal pump, which start before the pump can not be used to achieve the characteristics of rapid self-priming, the new structure of self-priming centrifugal pump has become a hot research topic at home and abroad. The development history of the jet type self-priming centrifugal pump is reviewed; the operating mechanism and structural advantages of the jet type self-priming centrifugal pump are analyzed. On the basis of summarizing the research results, the water pressure from the deflector type asymmetric chamber, bowl valve automatic closing structure, jet nozzle geometry, nozzle contraction angle variables are analyzed in terms of self-priming progress on theory and technology of centrifugal pump, and the future research direction is proposed. In the aspect of hydraulic design, the hydraulic model of different structure is designed, and the influence of various geometric parameters of the impeller on the overall performance of the pump is deeply discussed, the innovative self-priming structure and self-pri-ming mechanism were applied, by using the new principle of self-priming, constantly deepen the impact of structure on performance self-priming, and to determine the method of selecting the optimum geometrical parameters of the various components to improve the performance of jet self-priming centrifugal pump. In the process, breaking the traditional method of manufacturing a casting, the new type of aluminum die casting is applied. For the development of efficient, rapid self-priming, low-power jet self-priming centrifugal pumps provide a realistic basis and theoretical reference.
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