FIELD: non-displacement compressors and pumps.
SUBSTANCE: turbomachine comprises an air compression stage comprising at least one moving compressor wheel, an air intake pipe coupled to said air compression stage, a first sealing device positioned between a front portion of the moving compressor wheel and the air intake pipe comprising at least one pressure seal, a channel for conveying air compressed by the moving wheel. Second sealing device is positioned between a rear portion of the moving compressor wheel and the conveyance channel and configured to receive an air flow coming from the conveyance channel. Second sealing device is configured to allow withdrawal of part of the air passing through it, and the withdrawn air is conveyed to the pressure seal of the first sealing device so as to keep it pressurised.
EFFECT: object of the invention is to improve existing turbomachines and, in particular, to prevent the leakage of lubricating oil contained in the guide bearing in the air inlet pipe.
10 cl, 4 dwg
