Research and application of wide and efficient hydraulic design in centrifugal pump

Abstract

Through the analysis of the wide and efficient mechanism of centrifugal pump, this paper finds that the shape of the blade inlet angle to the outlet angle distribution line of the centrifugal pump impeller within the blade wrapping angle is the key factor determining the width and efficiency. Two sets of blade thickening laws are adopted, namely the equal thickness type and the NACA1933 air-foil. Tests have shown that the hill-type is superior Linear scheme, NACA1933 air-foil blades are superior to equal-thickness blades. The hill-type solution achieves the performance indicators of wide and efficient centrifugal pumps. Firstly, the angle distribution line of the inlet angle to the outlet angle of the pump is designed, and the calculus equation is applied to solve the conformal transformation line in the square grid, so as to produce a wide and efficient centrifugal pump impeller profile. The design method is applied to different specific speed centrifugal pumps, and the test results show that this method achieves the purpose of wide and efficient centrifugal pump, reaches the international advanced level, and provides a new method for the hydraulic design of centrifugal pump.