GAS TURBINE ENGINE AIR SYSTEM Russian patent published in 2024 - IPC F02C7/06 F02C7/18 F01D25/12 

FIELD: machine building.

SUBSTANCE: invention relates to air systems of gas turbine engines. Air system of gas turbine engine contains supercharging cavities of supports and pre-oil cavities of low-pressure compressor and high-pressure compressor, supercharging cavity of supports and pre-oil cavities of turbine, supply air duct. Supercharging cavities of the low-pressure and high-pressure compressor supports and the supercharging cavity of the turbine supports are communicated with each other and with the intra-shaft zone formed by the shaft of the low-pressure turbine, and with inter-shaft zone formed by high-pressure compressor and low-pressure turbine shaft, and through seals with gas-air path of engine and with similar pre-oil cavities and cavities of oil system. Air system is equipped with at least one additional air duct, the inlet of which is connected to the intra-shaft zone, and the outlet is directly connected to the pre-oil cavities of the turbine. At the same time area of flow passage of additional air duct exceeds total area of flow passage section of seals connecting turbine supports pressurization cavity with pre-oil cavities of turbine supports at least by 1.5 times.

EFFECT: increased service life and reliability of turbine support structure elements due to reduced temperature of air supplied to turbine support supercharging.

1 cl, 2 dwg