SEALING UNIT DOWNSTREAM OF TURBOJET DOUBLE-LOOP ENGINE Russian patent published in 1995 - IPC

FIELD: aircraft engineering. SUBSTANCE: sealing unit has labyrinth coupled with the compressor shaft. The rim of the labyrinth is secured to the disk of the last compressor wheel. The labyrinth is provided with sealing combs and answered sealing members made on the segment ring. The flange of the segment ring is secured to the flow straightening grids to define a relief space connected with the outer engine loop. A bearing, whose support is provided with a diaphragm, is mounted on the shaft. The diaphragm is secured to the flow straightening grids. The device is additionally has deflector secured to the segment ring. The support collar of the deflector is in contact with the bearing projection of the diaphragm to define an intermediate tight space between the diaphragm and deflector. The intermediate space is in communication with the low- pressure chamber of the compressor. A part of the segment ring between the sealing members and flange for its securing is cylindrical and flexible. EFFECT: enhanced reliability. 2 dwg