Air supplementation structure of centrifugal compressor and compressor

Abstract

The invention aims at providing an air supplementation structure of a centrifugal compressor. The air supplementation structure is used for solving the technical problems that in an existing compressor, supplemented air is mixed with air in a compressor air passing channel to generate turbulent flow losses, and then the circulation efficiency of the whole compressor is influenced. The air supplementation structure of the centrifugal compressor comprises an annular air supplementation channel used for leading supplemented air flow into a compressor air passing channel. An air flow guide assembly is arranged in the annular air supplementation channel and used for adjusting the direction of the supplemented air flow flowing into the air passing channel, so that the included angle between the direction of the supplemented air flow flowing into the air passing channel and the direction of air flow in the air passing channel is within a preset range, turbulent flow losses generated when two paths of air are fused are avoided to the largest degree, and therefore circulation efficiency is improved. The invention further provides the compressor with the air supplementation structure.

Description

technical field [0001] The invention relates to the field of compressors, in particular to an air supply structure for a centrifugal compressor and a compressor with the air supply structure. Background technique [0002] In order to improve the cycle efficiency of two-stage or multi-stage centrifugal compressors, a cycle with an economizer is often used. The gaseous refrigerant flashed in the economizer enters the impeller of the next stage or the bend of the reflux device through the air supply channel for air supply. . The way of invigorating air can be single-point invigorating or 360°circular invigorating. The single-point air supply will cause local turbulence loss, resulting in a certain waste of efficiency, and the scope of use is relatively limited, while the 360° annular air supply can be better integrated with the previous stage impeller, making the airflow more uniform and maximizing Reduce turbulence loss, so as to better improve cycle efficiency. [0003] Ge...

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Problems solved by technology

[0003] Generally, there is no special treatment for the position of the gas supply port of the 360° annular gas supply structure. Once the gas flow rate at the gas supply position is relatively high or low relative to the gas flow rate in the diffuser channel, turbulent flow loss will occur and affect the entire system. Compressor Cycle Efficiency

[0004] In view of the above problems, it is urgent to provide a new centrifugal compressor air supply structure to solve the turbulence loss caused by the mixing of the air supply gas and the gas in the compressor air passage in the prior art, which affects the entire compressor cycle. efficiency problem

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