Centrifugal compressor gas-supplementing structure and compressor

Patent metadata

Field	Value
Publication number	US-10544799-B2
Application number	US-201615768371-A
Country	US
Kind code	B2
Filing date	Oct 13, 2016
Priority date	Oct 15, 2015
Publication date	Jan 28, 2020
Grant date	Jan 28, 2020

Abstract

Provided are a centrifugal compressor gas-supplementing structure and a compressor using the foregoing gas-supplementing structure. The centrifugal compressor gas-supplementing structure includes a annular gas-supplementing passage (6) for introducing supplemented gas into a gas passage (5) of a compressor, and an airflow-guiding assembly is provided in the annular gas-supplementing passage (6). The gas-guiding assembly is used for adjusting a direction of the supplemented gas flowing into the gas passage (5), so that an angle between a direction of the supplemented gas flowing into the gas passage (5) and a direction of an airflow in the gas passage (5) falls within a preset range, and a turbulence loss generated when the two passages of gas merge is avoided to the greatest extent, thereby improving cycle efficiency.

First claim

What is claimed is:

1. A centrifugal compressor gas-supplementing structure, comprising an annular gas-supplementing passage ( 6 ) for introducing supplemented gas into a gas passage ( 5 ) of a compressor, wherein an airflow-guiding assembly is provided in the annular gas-supplementing passage ( 6 ), and the airflow-guiding assembly is used for adjusting a direction of the supplemented gas flowing into the gas passage ( 5 ), so that an angle between a direction of the supplemented gas flowing into the gas passage ( 5 ) and a direction of an airflow in the gas passage ( 5 ) falls within a preset range, the airflow-guiding assembly comprises at least one group of guide vanes ( 7 ) provided in a circumferential direction of the annular gas-supplementing passage ( 6 ), wherein the preset range is −5° to 5°; wherein a thickness of each guide vane of the at least one group of guide vanes ( 7 ) is the same as a thickness of each return vane ( 41 ).

2. The centrifugal compressor gas-supplementing structure as claimed in claim 1 , wherein each guide vane of the at least one group of guide vanes ( 7 ) is of a flat plate shape, an inclined direction thereof is the same as an inclined direction of each return vane ( 41 ) of the compressor; or, each guide vane of the at least one group of guide vanes ( 7 ) is of a spiral shape, a spiral direction thereof is the same as an inclined direction of each return vane ( 41 ) of the compressor.

3. The centrifugal compressor gas-supplementing structure as claimed in claim 2 , wherein viewed from an axial direction of an impeller, each guide vane of the at least one group of the guide vanes ( 7 ) is provided radially outside of each return vane ( 41 ); and each guide vane of the at least one group of guide vanes ( 7 ) is provided on a spiral line extending outward in a spiral direction of each return vane ( 41 ), or the each guide vane of the at least one group of the guide vanes ( 7 ) is spaced from each corresponding return vane ( 41 ).

4. The centrifugal compressor gas-supplementing structure as claimed in claim 1 , wherein two opposite side surfaces of each guide vane of the at least one group of guide vanes ( 7 ) are connected with an inner wall of the annular gas-supplementing passage ( 6 ) respectively.

5. The centrifugal compressor gas-supplementing structure as claimed in claim 1 , wherein the number of guide vanes in the at least one group of guide vanes ( 7 ) is the same as the number of return vanes ( 41 ).

6. The centrifugal compressor gas-supplementing structure as claimed in claim 1 , wherein a supplemented gas outlet ( 62 ) of the gas passage ( 5 ) is provided at an inlet bend of a returning device ( 4 ) and/or an inlet of a next-stage impeller, each of the at least one group of guide vanes ( 7 ) is provided closer to the supplemented gas outlet ( 62 ) relative to a supplemented gas inlet ( 61 ).

7. The centrifugal compressor gas-supplementing structure as claimed in claim 2 , wherein two opposite side surfaces of each guide vane of the at least one group of guide vanes ( 7 ) are connected to an inner wall of the annular gas-supplementing passage ( 6 ) respectively.

8. The centrifugal compressor gas-supplementing structure as claimed in claim 3 , wherein two opposite side surfaces of each guide vane of the at least one group of guide vanes ( 7 ) are connected to an inner wall of the annular gas-supplementing passage ( 6 ) respectively.

9. The centrifugal compressor gas-supplementing structure as claimed in claim 2 , wherein the number of guide vanes in the at least one group of guide vanes ( 7 ) is the same as the number of return vanes ( 41 ).

10. The centrifugal compressor gas-supplementing structure as claimed in claim 3 , wherein the number of guide vanes in the at least one group of guide vanes ( 7 ) is the same as the number of return vanes ( 41 ).

11. A centrifugal compressor gas-supplementing structure, comprising an annular gas-supplementing passage ( 6 ) for introducing supplemented gas into a gas passage ( 5 ) of a compressor, wherein an airflow-guiding assembly is provided in the annular gas-supplementing passage ( 6 ), and the airflow-guiding assembly is used for adjusting a direction of the supplemented gas flowing into the gas passage ( 5 ), so that an angle between a direction of the supplemented gas flowing into the gas passage ( 5 ) and a direction of an airflow in the gas passage ( 5 ) falls within a preset range, the airflow-guiding assembly comprises at least one group of guide vanes ( 7 ) provided in a circumferential direction of the annular gas-supplementing passage ( 6 ), wherein a thickness of each guide vane of the at least one group of guide vanes ( 7 ) is the same as a thickness of each return vane ( 41 ).

12. A centrifugal compressor gas-supplementing structure, comprising an annular gas-supplementing passage ( 6 ) for introducing supplemented gas into a gas passage ( 5 ) of a compressor, wherein an airflow-guiding assembly is provided in the annular gas-supplementing passage ( 6 ), and the airflow-guiding assembly is used for adjusting a direction of the supplemented gas flowing into the gas passage ( 5 ), so that an angle between a direction of the supplemented gas flowing into the gas passage ( 5 ) and a direction of an airflow in the gas passage ( 5 ) falls within a preset range, the airflow-guiding assembly comprises at least one group of guide vanes ( 7 ) provided in a circumferential direction of the annular gas-supplementing passage ( 6 ), wherein the preset range is −5° to 5°; wherein the number of guide vanes in the at least one group of guide vanes ( 7 ) is the same as the number of return vanes ( 41 ).

Assignees

• Gree Electric Appliances Inc Zhuhai

Inventors

• Jiang Nan
• Zhang Zhiping
• Zhong Ruixing
• Jiang Caiyun
• Xie Rong
• Liu Jianfei
• Chen Yuhui
• Huang Baoqian
• Zhang Jing
• Zhou Yi

Classifications

• F04D29/444

  Bladed diffusers · CPC title

• F04D17/122

  the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors · CPC title

• F04D29/684 Primary

  by fluid injection · CPC title

• F04D29/44 Primary

  Fluid-guiding means, e.g. diffusers · CPC title

• F04D29/667

  by influencing the flow pattern, e.g. suppression of turbulence · CPC title