A NEW TYPE IMPELLER FOR AN AXIAL FLOW MACHINE

摘要

The utility model relates to an impeller for an axial flow pump or an axial flow compressor. The object is that a new impeller for an axial flow machine is provided to eliminate the unstable running region in the flow head curve for the axial flow pump or the axial flow compressor. The characteristic is that: the working face of the blade is an outward convex camber surface, the back face of the blade is a corresponding concave camber surface. In the utility model, the shape of a saddle in the flow head curve for the axial flow pump is eliminated, the progressive stall and the abrupt stall in the flow head curve for the axial flow compressor are also eliminated. So the running in the original unstable running region becomes as stable as the centrifugal pump or the centrifugal compressor, the working reliability of the axial flow pump or the axial flow compressor is improved.