GAS-TURBINE ENGINE BEHIND-THE-COMPRESSOR LABYRINTH SEAL Russian patent published in 2004 - IPC

FIELD: mechanical engineering; gas-turbine engines of ground and aircraft application. SUBSTANCE: according to invention, in proposed behind-the compressor labyrinth seal of gasturbine engine containing two-tier labyrinth with sealing lips installed on shaft and mating stator flange, sealing lip of each tier of labyrinth extreme from compressor rotor is made of increased thickness at H/h=1.5-3, where H is thickness of extreme lip; h is thickness of other lips. Working surfaces of sealing lips of inner tier of labyrinth are made to generatrix of cone with angle of tilting of 0.5^o - 3^o towards side of outlet from labyrinth, and number of lips of outer tier of labyrinth is 1.5-5 times greater than number of lips on inner tier labyrinth. EFFECT: improved reliability in operation owing to reduction of thermal stresses and increase of vibration stability in seal lips, reduced wear. 2 dwg