GAS TURBINE ENGINE Russian patent published in 2003 - IPC

FIELD: aviation industry; gas turbine engines of aircraft and ground application. SUBSTANCE: proposed gas turbine engine contains high pressure compressor, combustion chamber, high-pressure turbine and low-pressure turbine. Oil space of engine bearing support is sealed by two-tier seal containing upper and lower labyrinths pointed to air space, and flange mating the labyrinths pointed to oil space. Lips of labyrinth lower in diameter have inclined side surfaces pointed to oil space, and those of upper labyrinth, with inclined side surfaces pointed to air space. Inner surface of upper labyrinth is made inclined. EFFECT: improved reliability of gas turbine engine by sealing of oil spaces of bearing supports using two tier labyrinth seals. 2 dwg