Impeller of compressor

Abstract

The invention provides an impeller of a compressor. The impeller comprises a turntable and a plurality of blades arranged on the turntable, wherein the blades are separated from the centre of the turntable along the radial direction, and outwards extended along the surface of the turntable; a fillet-shaped structure is formed at the part at which the roots of the blades are connected with the turntable; fillet-shaped parts formed at the front edges of the blades and the turntable have radius Rh, the filled-shaped parts formed at the tail edges of the blade and the turntables have radius Rf, and the Rh is less than Rf based on the number. With adoption of the impeller of the compressor provided by the invention, the conflict in design of a pneumatic sensitive position and a stress concentration position can be effectively solved, and the pneumatic performance of the actual impeller appropriate ideal design value, and moreover, the stress concentration at the roots can be greatly reduced, the service life of the impeller is prolonged, and the requirements on the materials of the impeller are also relatively reduced, and as a result, the economy of the impeller is increased.

Description

technical field [0001] The invention relates to the technical field of compressor equipment, in particular to an impeller used in a turbo compressor. Background technique [0002] Usually, the structural shape of the blade root of the turbine compressor impeller is an equal-radius rounded shape, which is an equal-radius arc structure formed by milling along the blade root with a milling cutter with a certain radius after the blade milling is completed. In the design of the impeller, the leading edge of the blade is a sensitive position of the inlet gas flow, and the fillet radius of this area should be as small as possible; at the same time, the root of the suction surface of the blade trailing edge is a sensitive position of the structural stress, and this position requires a larger fillet radius. Corner radii to reduce stress concentrations. In general, in the process of impeller design, the aerodynamic performance and stress are usually compromised, and the blade root fi...

AI Technical Summary

Problems solved by technology

Under normal circumstances, in the process of impeller design, aerodynamic performance and stress are usually considered in compromise, and the radius of the blade root fillet is selected as a compromise. This structural design cannot sufficiently reduce stress concentration, and affects the aerodynamic performance of the impeller.

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