FIELD: machine building.
SUBSTANCE: in centrifugal compressor containing shaft with impellers, which is installed in the housing, piston disc the outer surface of which is stepped, and piston sleeve enclosing it; the outer surface of piston disc is cylindrical and consists of sections of various diameters with formation of a projection on outer cylindrical surface of piston disc, and labyrinth combs and a groove mating to piston disc projection is arranged on inner surface of piston sleeve.
EFFECT: increasing efficiency by decreasing volumetric losses and spent compression operation of centrifugal compressor.
8 cl, 3 dwg
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