LABYRINTH SEAL OF TURBOMACHINE Russian patent published in 2012 - IPC F02C7/28 

FIELD: machine building.

SUBSTANCE: labyrinth combs "и" with outer diameter d decreasing from the disc are made in labyrinth seal of turbomachine. Sealing combs are made in the form of pairs with similar outer diameter of combs for each pair. Damping rings "и" are installed on edges of labyrinth rim. Stator honeycomb flange on the side of seal outlet is fixed on stator through elastic element. Flange is installed telescopically on the inlet side in radial direction relative to diaphragm. Diaphragm, flange and stator forms closed annular air cavity above flange. Ratio of H step between pairs of sealing combs "и" to h step between pair sealing combs is 4…6.

EFFECT: improvement of engine reliability in all operating conditions due to minimum radial gaps in labyrinth seal.

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