FIELD: machine building.
SUBSTANCE: centrifugal compressor equipped with: case; rotor with impeller; and labyrinth seal, secured in case and located opposite to rotor. Labyrinth seal is installed, at least, in impeller suction compartment or at balanced piston, balancing rotor thrust. Diameter of rotor located opposite to labyrinth seal, increases or decreases in step manner. Labyrinth seal is formed from a multitude of grooves in axial direction, and each groove is provided with multiple pockets formed in circumferential direction.
EFFECT: invention provides reducing leakage of sealing units of centrifugal compressor and higher damping characteristics of sealing assemblies.
6 cl, 9 dwg
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