GAS TURBINE ENGINE Russian patent published in 2003 - IPC

FIELD: gas turbine engines of aircraft or ground application. SUBSTANCE: invention relates to gas turbine engines of aircraft and ground application, including those formed by conversion of aircraft engines into ground engines. According to invention, in gas turbine engine containing high-and low-pressure rotors with intershaft bearing between rotors and labyrinth separating oil space of bearing from air space, jet ring is installed on low-pressure rotor shaft between labyrinth and inner race of intershaft bearing. Said jet ring is provided with channels to feed oil for lubricating intershaft bearing. Labyrinth and jet ring are interlocked by splines in circumferential direction, and end face splines are made in axial ring projection of labyrinth to fix labyrinth in circumferential direction relative to shaft of low-pressure rotor. Ring to adjust axial position of inner race of intershaft bearing is installed between shaft and labyrinth under projection of labyrinth at L/I= 0.5-2 where L is axial length of end face splines of labyrinth and I is axial width of adjusting ring. EFFECT: improved reliability of engine owing to provision of stability of lubrication of intershaft bearing. 3 dwg