CENTRIFUGAL COMPRESSORS WITH INTEGRATED INTERCOOLING Russian patent published in 2019 - IPC F04D29/44 

FIELD: machine building.

SUBSTANCE: described is centrifugal compressor 1 with internal cooling. Said compressor includes casing 3, upstream and downstream impellers 9 and 11, stationary diaphragm 5 consisting of internal diaphragm portion 21 and external diaphragm portion 23, upstream diffuser 13 connected to an outlet of the upstream impeller, return channel 15 connected to upstream diffuser 13 and to the inlet of downstream impeller 11 and having blades 19 connecting the internal diaphragm portion to the external diaphragm portion and downstream diffuser 17 connected to the outlet of downstream impeller 11. In internal diaphragm portion 21, first coolant channel 47 for the coolant is made, while first coolant channel 47 is in a state of heat exchange with upstream diffuser 13 and with return channel 15. In external diaphragm portion 23, second coolant channel 49 and third coolant channel 48 are made, while second coolant channel 49 and third coolant channel 48 are in heat exchange with return channel 15 and with downstream diffuser 17.

EFFECT: centrifugal compressors with integrated intermediate cooling are proposed.

13 cl, 9 dwg