Abstract: The present application provides a stator blade, a compressor structure and a compressor. The stator blade comprises a blade body, wherein a cavity is formed inside the blade body, and a gas supply hole is formed on the blade body. The present application forms a jet on the suction surface of the stator blade by supplemented gas, thereby blowing off the low-speed low-energy region formed by the suction surface, reducing the gas flow mixing loss caused by the supplemented gas, thereby improving the aerodynamic efficiency of the centrifugal compressor.

Abstract: Some embodiments of the disclosure provide a bearing installation and fixation structure and a compressor. The bearing installation and fixation structure includes: a rotatable shaft (7); a bearing (6), provided on the rotatable shaft (7) in a sleeving manner; and an axial locating member, provided on the rotatable shaft (7) in a sleeving manner and including a fixing connecting section (1) and an axial locating section (2) that are integrated with each other; the fixing connecting section (1) is detachably fixed on the rotatable shaft (7); and the axial locating section (2) limits a position of the bearing (6) axially.

Abstract: Embodiments of the present disclosure describe a reflux device blade and a compressor. The reflux device blade includes a blade main body, a hollow cavity is formed in the blade main body, and an air supplement hole is formed in the blade main body. When the hollow reflux device blade is adopted, the supplemental air entering the hollow cavity of the reflux device blade through an air supplement channel forms jet flow on a suction surface of the reflux device blade to blow off a low-speed low-energy area formed on the suction surface, so as to reduce the airflow mixing loss, prevent the intake distortion of a second-stage impeller, and improve the operation range of the compressor.

Abstract: The present application provides a stator blade, a compressor structure and a compressor. The stator blade comprises a blade body, wherein a cavity is formed inside the blade body, and a gas supply hole is formed on the blade body. The present application forms a jet on the suction surface of the stator blade by supplemented gas, thereby blowing off the low-speed low-energy region formed by the suction surface, reducing the gas flow mixing loss caused by the supplemented gas, thereby improving the aerodynamic efficiency of the centrifugal compressor.

Abstract: The present application discloses a diffuser vane, a compressor structure and a compressor. The diffuser vane includes a vane body, wherein a cavity is formed inside the vane body, and a gas supplement hole is formed on the vane body.

Abstract: An integrated structure of a return device and a pressure diffuser, and a centrifugal compressor are provided. The structure includes a pressure diffuser portion and a return device portion integrally molded with the pressure diffuser portion. The pressure diffuser portion is configured to form a pressure diffusion flow channel. The return device portion has a return channel. The return channel is in communication with the pressure diffusion flow channel, and is configured to guide gas from the pressure diffusion flow channel. The structure of the present invention eliminates a need of independently installing a return device and a pressure diffuser, and eliminates connection seams caused by assembly and misalignment caused by accumulated errors. Therefore, gas can smoothly flow through the pressure diffusion flow channel into the return channel, such that a gas flow is well guided, and the gas flow uniformity is better.

Abstract: Some embodiments of the disclosure provide a bearing installation and fixation structure and a compressor. The bearing installation and fixation structure includes: a rotatable shaft (7); a bearing (6), provided on the rotatable shaft (7) in a sleeving manner; and an axial locating member, provided on the rotatable shaft (7) in a sleeving manner and including a fixing connecting section (1) and an axial locating section (2) that are integrated with each other; the fixing connecting section (1) is detachably fixed on the rotatable shaft (7); and the axial locating section (2) limits a position of the bearing (6) axially.

Abstract: Embodiments of the present disclosure describe a reflux device blade, a compressor structure and a compressor. The reflux device blade includes a blade main body, a hollow cavity is formed in the blade main body, and an air supplement hole is formed in the blade main body. When the hollow reflux device blade is adopted, the supplemental air entering the hollow cavity of the reflux device blade through an air supplement channel forms jet flow on a suction surface of the reflux device blade to blow off a low-speed low-energy area formed on the suction surface, so as to reduce the airflow mixing loss, prevent the intake distortion of a second-stage impeller, and improve the operation range of the compressor.

Abstract: An integrated structure of a return device and a pressure diffuser, and a centrifugal compressor are provided. The structure includes a pressure diffuser portion and a return device portion integrally molded with the pressure diffuser portion. The pressure diffuser portion is configured to form a pressure diffusion flow channel. The return device portion has a return channel. The return channel is in communication with the pressure diffusion flow channel, and is configured to guide gas from the pressure diffusion flow channel. The structure of the present invention eliminates a need of independently installing a return device and a pressure diffuser, and eliminates connection seams caused by assembly and misalignment caused by accumulated errors. Therefore, gas can smoothly flow through the pressure diffusion flow channel into the return channel, such that a gas flow is well guided, and the gas flow uniformity is better.