IMPROVED INTERMEDIATE CASING FOR GAS TURBINE ENGINE AND ACCESSORY GEARBOX DRIVE ASSEMBLY Russian patent published in 2018 - IPC F01D25/16 F02C7/32 

FIELD: internal combustion engines.

SUBSTANCE: gas turbine engine intermediate casing comprises an internal hub designed to accept a gas turbine engine compressor shaft, an outer shell ring, a plurality of radial arms connecting the hub and the shell ring and a bevel gearbox for the radial shaft. One of the arms comprises an internal housing for the radial shaft for driving auxiliary machines. Bevel gearbox for the radial shaft is arranged in the outer shell ring, said gearbox being formed as one with the outer shell ring and comprising a housing for gears between a radial shaft and an accessories gearbox, and having an opening which opens to the periphery of the outer shell ring. Another invention of the group relates to a drive assembly of the accessories gearbox of a gas turbine engine, comprising said intermediate casing. Another invention of the group relates to a gas turbine engine comprising a drive shaft, an accessories gearbox and said drive assembly of an accessories gearbox. When the drive assembly of the accessories gearbox is mounted on the gas turbine engine, a gear transmission is inserted into the bevel gearbox the casing through an opening in the outer wall of the shell of the casing and said transmission is fastened to the wall of the bevel gearbox. Radial shaft is inserted into the arm of the casing through the hub of the gear hub of the gearbox, the device of axial locking of the radial shaft is introduced into the gear hub and the opening at the periphery of the outer shell is closed with a cover.

EFFECT: group of inventions reduces the weight of the gas turbine engine and simplify its maintenance.

10 cl, 12 dwg