Large-flow high-pressure high-efficiency centrifugal pump impeller and design method thereof

Abstract

The embodiment of the invention discloses a large-flow high-pressure high-efficiency centrifugal pump impeller and a design method thereof.The design method comprises the steps that 1, a design point of a centrifugal pump is designed, specifically, the design point is moved to a small-flow working condition point on the basis that the basic requirement for large-flow pressurization of the centrifugal pump is met and the use requirement for improving the efficiency of the small-flow working condition point is met; 2, based on the supercharging requirement of the centrifugal pump under the large-flow working condition, impeller parameters and volute parameters are designed, and the supercharging target value of the centrifugal pump under the large-flow working condition is increased; 3, the impeller shaft face flow channel is subjected to shape modification, specifically, a projection drawing of the impeller shaft face flow channel is formed, and the angle alpha in the projection drawing is increased; wherein the angle alpha is a tangent included angle of hub lines on two sides of a hub molded line bending area. According to the technical scheme, the problem that a centrifugal pump impeller designed according to an existing unary design theory can only guarantee efficient operation of a centrifugal pump under the design working condition, and the efficiency is difficult to guarantee under other non-design working conditions is solved.

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