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Aerodynamic noise reducing structure of centrifugal gas compressor

A gas compressor and aerodynamic noise technology, which is applied in the field of compressor noise reduction, can solve the problems of compressor supercharger noise, supercharger high-frequency noise, etc., to reduce air resistance, reduce processing accuracy, and be easy to use Effect

Pending Publication Date: 2021-07-02
德耐尔能源装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Because the supercharger of the compressor has the characteristic of high speed, the high-frequency noise generated by the supercharger is difficult to be shielded by the noise of the external environment, which easily causes the noise of the compressor supercharger

Method used

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  • Aerodynamic noise reducing structure of centrifugal gas compressor
  • Aerodynamic noise reducing structure of centrifugal gas compressor
  • Aerodynamic noise reducing structure of centrifugal gas compressor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like figure 1 and 2 shown,

[0030] A structure for reducing aerodynamic noise of a centrifugal gas compressor, comprising an impeller 1 and a cover plate 2; the cover plate cover is arranged above the impeller 1; the impeller 1 comprises a plurality of alternately arranged long blades 11 and The short blade 12; the processing profile of the long blade 11 is provided with a plurality of grooves 111 equidistantly arranged along the processing profile, and the processing profile on the inner side of the cover plate 2 is provided with all the grooves 111. The groove 111 matches the bump 21 .

[0031] Preferably, the cross section of the groove 111 is triangular, and the depth of the groove 111 is 0.5-1.5 mm.

Embodiment 2

[0033] like figure 1 and 3 As shown, a structure for reducing aerodynamic noise of a centrifugal gas compressor includes an impeller 1 and a cover plate 2; the cover plate cover is arranged above the impeller 1; the impeller 1 includes a plurality of alternately arranged long The blade 11 and the short blade 12; the machining profile of the long blade 11 is provided with a plurality of grooves 111 arranged at equal intervals along the machining profile, and the machining profile on the inner side of the cover plate 2 is provided with a plurality of grooves 111. There are bumps 21 matching the grooves 111 .

[0034] Preferably, the cross section of the groove 111 is a semicircle, and the depth of the groove 111 is 0.5-1.5 mm.

Embodiment 3

[0036] like figure 1 and 4 As shown, a structure for reducing aerodynamic noise of a centrifugal gas compressor includes an impeller 1 and a cover plate 2; the cover plate cover is arranged above the impeller 1; the impeller 1 includes a plurality of alternately arranged long The blade 11 and the short blade 12; the machining profile of the long blade 11 is provided with a plurality of grooves 111 arranged at equal intervals along the machining profile, and the machining profile on the inner side of the cover plate 2 is provided with a plurality of grooves 111. There are bumps 21 matching the grooves 111 .

[0037] Preferably, the cross section of the groove 111 is rectangular, and the depth of the groove 111 is 0.5-1.5 mm.

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Abstract

The invention discloses an aerodynamic noise reducing structure of a centrifugal gas compressor. The structure comprises an impeller and a cover plate, wherein the cover plate is arranged above the impeller in a covering manner; the impeller comprises a plurality of long blades and short blades which are alternately arranged; and a plurality of grooves which are arranged at equal intervals along a machining molded line are formed in the machining molded line of the rim of each long blade, and protruding blocks matched with the grooves are arranged on the machining molded line on the inner side of the cover plate. By means of the grooves in the long blades and the protruding blocks on the inner side of the cover plate, an original smooth gap between the impeller and the cover plate is changed into a multi-bending gap, airflow vortexes caused by high temperature and high pressure between the impeller and the cover plate when the impeller rotates at a high speed are avoided, and further aerodynamic noise generated when the impeller rotates is avoided; and due to the grooves and the protruding blocks, generation of airflow vortexes is restrained, air resistance borne by the impeller during rotation is greatly reduced, and energy consumption is reduced.

Description

technical field [0001] The invention relates to the field of compressor noise reduction, in particular to a structure for reducing aerodynamic noise of a centrifugal gas compressor. Background technique [0002] Since the supercharger of the compressor has the characteristic of high speed, the high-frequency noise generated by the supercharger is difficult to be shielded by the external environmental noise, which easily causes the compressor supercharger to emit noise. [0003] The aerodynamic noise of the compressor supercharger, especially the aerodynamic noise generated by the impeller, has always been a noise reduction problem in the compressor supercharger industry. Compressor supercharger noise can be divided into structural noise and aerodynamic noise from the perspective of the generation mechanism. As the core pneumatic component of the compressor supercharger, the impeller is the most important part that produces the aerodynamic noise of the compressor supercharge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/28F04D29/30F04D29/42F04D29/66
CPCF04D29/284F04D29/30F04D29/4206F04D29/666F04D29/667
Inventor 严黎坚盛昌国
Owner 德耐尔能源装备有限公司
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