Abstract:The low head pump system, mainly axial-flow pump system research and technological innovation in China are introduced. The research and development trend on hydraulic performance of the axial flow pump system are discussed. The applications of high speed axial-flow pump hydraulic model and development progress are presented. Through inductive characteristics of axial-flow pump system, the classification of the system is put forward according to the installation position of the motor，namely the shaft extension type axial-flow pump system and the tubular axial-flow pump system. The innovation applying of the different types of axial-flow pump systems in a quantity pumping station projects is introduced respectively. From the perspective of technological development, the development trends and application prospects of axial-flow pump system are analyzed. The limitations of the traditional pump selection method are discussed, and the applicable rationality of a new method of pump selection for the axial-flow pump system is introduced. The variable angle adjustment formula and applicability based on the test data of axial-flow pump system are introduced. The harmfulness to the pump units from the intake vortex and the safety policies are analyzed. The research results of the vortices in the pump sump and the measures of vortices prevention and elimination are described. As regarding the real and potential problems in research development on axial-flow pump system, the suggestions for further deepen researches are presented. Although the hydraulic performance of axial flow pump system research has reached a higher level, but possibility of partial breakthroughs still exists. The future research direction of pump system should be more to the structural optimization, the pump system reliability and adaptability, vibration and noise, and run quality promotion.
