Inducer for high-speed centrifugal pump and working method thereof

Abstract

The invention discloses an inducer for a high-speed centrifugal pump and a working method thereof. According to a traditional inducer, stable liquid flow at an outlet of the inducer cannot be achieved, and inducer outlet lift cannot meet the requirement of an impeller inlet. A first nonlinear variable-curvature hub is a rotating body with a quarter convex ellipse as a generatrix and the curvatureradius gradually increasing along the direction from the first nonlinear variable-curvature hub to a second linear hub, the second linear hub is a rotating body with an oblique line as a generatrix, and a third nonlinear variable-curvature hub is a rotating body with a quarter concave ellipse as a generatrix and the curvature radius gradually decreasing in the direction from the first nonlinear variable-curvature hub to the second linear hub; main blades are fixed on the first nonlinear variable-curvature hub and the second linear hub; and the third nonlinear variable-curvature hub is fixedlyprovided with four tail long flow dividing blades uniformly distributed along the circumferential direction and four tail short flow dividing blades uniformly distributed in the circumferential direction. The dual functions of stabilizing the outlet liquid flow and increasing the outlet lift are achieved.

Description

technical field [0001] The invention belongs to the field of fluid machinery, and in particular relates to an inducer for reducing the cavitation phenomenon of a high-speed centrifugal pump and a working method thereof. Background technique [0002] High-speed centrifugal pumps are widely used in oil refining, petrochemical, chemical industry and aerospace technology and other fields. However, high-speed centrifugal pumps are prone to cavitation during operation. The cavitation phenomenon has a great impact on the performance of the centrifugal pump. Cavitation can cause spots and cracks on the surface of the blade, and even gradually fall off in a spongy shape; when cavitation occurs, noise will be emitted, which will cause the pump body to vibrate; cavitation When the phenomenon is serious, it can lead to complete inability to output liquid. [0003] At present, the inducer is one of the most effective methods to improve the cavitation performance of centrifugal pumps. I...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to design a new type of inducer for high-speed centrifugal pump and its working method in view of the fact that the traditional inducer cannot simultaneously meet the requirements of the stability of the liquid flow at the outlet of the inducer and the lift of the outlet of the inducer to meet the inlet of the impeller.

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