A compressor assembly includes an impeller rotatable about a central axis, and a seal assembly. The seal assembly includes a labyrinth seal defining a seal interface with a sealing element of the impeller, and a seal support ring into which the labyrinth seal is installed. The seal support includes a deflector ramp fluidly downstream of the seal interface. The deflector ramp is configured to turn an airflow leaking through the seal interface radially inwardly toward the central axis.

The present invention provides a centrifugal multistage compressor adapted to inhibit corrosion of an intermediate stage labyrinth. More particularly, the present invention provides a centrifugal multistage compressor adapted to inhibit carbon dioxide corrosion of the intermediate stage labyrinth. The centrifugal multistage compressor of the present invention includes: a rotary shaft equipped with a plurality of impellers; an ejection flow path extended between a first stage of the impellers and a last stage of the impellers and serving to discharge a fluid once from the compressor; a suction flow path extended between the first stage of the impellers and the last stage of the impellers and serving to inject the discharged fluid once again into the compressor; an intermediate diaphragm disposed between the ejection flow path and the suction flow path; and an intermediate stage labyrinth for sealing between the ejection flow path and the suction flow path, and has a configuration where the intermediate diaphragm includes a bypass flow path for supplying the intermediate stage labyrinth with some of the fluid flowing to the ejection flow path.

A turbo compressor and a refrigeration cycle device having a turbo compressor are provided. The turbo compressor includes a housing having a motor chamber; a drive motor having a stator and a rotor in the motor chamber of the housing; a first compression portion and a second compression portion, respectively, provided on opposite ends of a rotary shaft; a connecting passage that connects an exit of the first compression portion and an entrance of the second compression portion; an inlet passage that penetrates a first side of the housing to communicate with an inside of the motor chamber and guide a refrigeration fluid to the motor chamber; and an outlet passage that penetrates a second side of the housing to communicate with the inside of the motor chamber and guide the refrigeration fluid in the motor chamber out of the housing. Thus, a gas foil bearing provided in the motor chamber may be quickly actuated by supplying the refrigeration fluid to the motor chamber, and at a same time, heat generated from the motor chamber may be quickly dissipated even in a highspeed operation, thereby improving efficiency of the turbo compressor and a refrigeration cycle device having a turbo compressor.

A fan motor waterproof structure includes a fan motor, a disk-shaped member, and a tubular member. The fan motor is arranged with a shaft projecting upward from a motor body. The a disk-shaped member is fitted to an outside of a projecting portion of the shaft of the fan motor on a motor body side. The tubular member is press-fitted onto the disk-shaped member and disposed on an outer periphery of the shaft. The tubular member covers a boundary between an upper surface of the disk-shaped member and the shaft.

A fan motor waterproof structure includes a fan motor, a disk-shaped member, and a tubular member. The fan motor is arranged with a shaft projecting upward from a motor body. The a disk-shaped member is fitted to an outside of a projecting portion of the shaft of the fan motor on a motor body side. The tubular member is press-fitted onto the disk-shaped member and disposed on an outer periphery of the shaft. The tubular member covers a boundary between an upper surface of the disk-shaped member and the shaft.

A pair of slide components (4, 7) have sliding faces (S) sliding relative to each other, and a sealed fluid-side periphery (16) and a leakage-side periphery (15). The sliding face (S) of at least one slide component includes: a fluid introduction groove (13) in communication with the sealed fluid-side periphery (16); a first pressure generation mechanism (12) of which one end is in communication with the fluid introduction groove (13) and the other end is surrounded by a land portion (R1); and a second pressure generation mechanism (11) of which one end is in communication with the leakage-side periphery (15) and the other end is surrounded by an annular land portion (R2). The fluid introduction groove (13) and the other end (12e) of the first pressure generation mechanism (12) include overlapping portions (Lp) overlapping circumferentially. The slide components can exhibit sealing performance and lubricity regardless of rotating direction.

A contra-rotating compressor includes a first shaft assembly disposed in a housing, the first shaft assembly including an outer shaft, and a first plurality of impellers coupled to the outer shaft, wherein the outer shaft includes a final stage that includes a final impeller of the first plurality of impellers. The compressor further includes a second shaft assembly disposed in the housing and rotatable about the longitudinal axis that has a second plurality of impellers, a first pair of annular seals between the final stage and an inner surface of the housing that are configured to permit relative rotation between the final stage and the housing, and a third annular seal positioned between the outer surface of the final stage and an inner surface of the second shaft assembly that is configured to permit contra-rotation between the final stage and the second shaft assembly.

A thin fan includes a frame and a driving device. The driving device includes a stator structure and a rotor structure corresponding to the stator structure. The stator structure includes a stator magnetic pole group and a base body The rotor structure includes a rotor shell, a magnetic structure and an impeller connected to the rotor shell. The rotor shell includes a top plate, an outer sidewall, an oil seal and a protruding structure. A center of the rotor shell is formed with a cylindrical shaft. The rotor shell and the shaft are a single component manufactured by processing a single material workpiece. The stator magnetic pole group magnetically drives the magnetic structure as well as the rotor shell to rotate. Wherein an inner surface of the rotor shell facing the stator structure and corresponding to the base body is formed with an oil repellent layer.

A gas processing system includes a vessel defining a cavity for processing a gas. The vessel includes a process gas inlet for accepting process gas at an input pressure, and a process gas outlet for discharging process gas at an output pressure. The gas processing system further includes a shaft coupled to the vessel and a multistage sealing system comprising multiple seals spaced along the shaft. The shaft is configured to transfer mechanical energy to or from gas in the vessel. Each adjacent pair of seals defines a corresponding pressure space therebetween. One of the pressure spaces is an equalizing pressure space in hydraulic communication with the process gas inlet via a flow line, such that in operation, pressure in the equalizing pressure space is maintained at an equalized pressure with respect to a pressure in the process gas inlet.

A centrifugal compressor includes a low-speed shaft, an impeller, a speed increaser, a housing, a separation wall, a shaft insertion hole, a seal member, an oil pan, an oil supply passage, an oil return passage, and a pressure reduction passage. The impeller is integrally rotated with a high-speed shaft. The housing has therein an impeller chamber accommodating the impeller and a speed increaser chamber accommodating the speed increaser. The centrifugal compressor includes a bypass passage having a first end communicating with the speed increaser chamber and a second end communicating with the oil pan.