TURBOCHARGER Russian patent published in 2012 - IPC F04D29/51 F01D3/04 

FIELD: machine building.

SUBSTANCE: turbocharger comprises a housing and a rotor. The rotor includes the coaxial shaft and pipe shell, rigidly fastened to each other by at least two plates of uniform thickness equidistant from each other and oriented along the longitudinal axis of the rotor. The length of plates corresponds to the length of a pipe shell. End portions of the rotor are fixed to the gas-static bearings of the housing. The butt of the rotor, placed on the side of the housing, to which the longitudinal reaction force is directed, is tightly shut and forms a gas chamber together with the corresponding section of the housing, communicating with the discharge cavity of the compressor. The first gap formed by the surface of the bearing and the facing rotor surface, is isolated from the gas chamber by the seal, placed at the end portion of the rotor, and is directly connected with the discharge cavity of the compressor with a pressure required to unload the rotor of an axial force. The first gap opens into the first gas-collection ring, which is connected with the compressor suction cavity by a channel. The second gap formed by the surface of the second bearing and the surface of the rotor chamber, is isolated from the compressor discharge cavity with a seal placed between the last stage of the compressor and the facing side of the second bearing, and is directly linked to the release of the compressor. The second gap opens into the second gas-collection ring, communicated with the suction cavity of the compressor.

EFFECT: increased allowable peripheral velocity, axial and radial stiffness of the rotor, ensuring minimal weight and simplification of the manufacturing technology.

2 dwg