Abstract: At present, pump design systems generally rely on the secondary development of commercial CAD software, which is easily restricted. Therefore, a three-dimensional design system of axial flow pump impeller with independent intellectual property rights is developed based on related modeling functions of OpenCASCADE and the human-computer interaction interface constructed by Qt. Designers only need to input the design parameters of the axial flow pump to get the appropriate geometric shape of the axial flow pump impeller. An axial flow pump impeller with the specific speed of 869 was designed and verified by flow field simulation. Compared with the design result of CFturbo software, the results show that there is no software environment restriction in the system and the design steps are more suitable with the domestic design habits, which can meet the design requirements of head and efficiency, and provide a reference for parametric design of other types pump.

Key words: OpenCASCADE, axial flow pump impeller, Qt, computer aided design, parametric design