TURBINE LABYRINTH SEAL

摘要

FIELD: machine building.SUBSTANCE: turbine labyrinth seal comprises labyrinth abutting on turbine disc and mating flange with nozzle cooling air swirler. Said labyrinth is fitted on disc axial ring ledge to cover nozzle swirler to make slotted cavity between labyrinth and slotted cavity disc hub side surface. Seal ring is fitted in said cavity. Expanding damper ring is fitted on labyrinth inner surface to embrace labyrinth circular radial rib. Radial bores are made at ring cylindrical ledge.EFFECT: higher efficiency and reliability.1 dwg