hollow centrifugal impeller

Abstract

The invention provides a hollow centrifugal impeller. According to the hollow centrifugal impeller, the centrifugal impeller is divided into n divisions; the divided divisions are all vertical to the axis of the centrifugal impeller; the materials used by the divisions are determined according to the working conditions of different parts of the centrifugal impeller on which the divisions are located; a cavity is formed in the centrifugal impeller; the cavity is located in an area, which is low in stress according to measurement, of a conventional monometallic solid impeller; and the number n of the divisions is larger than or equal to 2. Compared with the conventional monometallic solid impeller, the hollow centrifugal impeller is advantaged in that the weight of the impeller can be effectively reduced; the stress of the impeller is lowered; the service life of the impeller is prolonged; the axial displacement of the outlet of the centrifugal impeller is greatly reduced, so that blade tip clearance design is facilitated; and the economy and practical application performance are improved.

Description

technical field [0001] The invention relates to the technical field of engines, and more specifically, to a hollow centrifugal impeller. Background technique [0002] Such as figure 1 As shown, the prior art adopts a single-metal solid disc structure. As the rotational speed increases or the radius of the impeller increases, the centrifugal load on the impeller increases. At this time, the disc needs to add more materials to bear the load, thus increasing If the weight of the impeller is increased, sometimes no matter how much the disk is increased, the requirements cannot be met, and the goals of light weight and long life of the centrifugal impeller used in small and medium-sized aeroengines or other gas turbine engines cannot be achieved. [0003] In order to solve the above problems, the applicant disclosed a compressor centrifugal impeller of an aero-engine in the patent application with publication number CN103967837A, and proposed to divide the centrifugal impeller i...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the shortcomings of heavy centrifugal impeller and low material utilization rate in the prior art. The present invention provides a hollow centrifugal impeller with double optimized structure and material. The hollow centrifugal impeller is light in weight and material utilization High efficiency, long life, simple manufacturing process

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