BYPASS TURBOJET ENGINE COOLING DEVICE Russian patent published in 2025 - IPC F02C7/18 F02K3/115 F02C7/20 

FIELD: aircraft engine building.

SUBSTANCE: invention relates to aircraft engineering, particularly, to bypass turbojet engines. Bypass turbojet engine cooling device with fan for the air supply to the engine external circuit channel formed between the shell and the gas generator housing located therein, and into the internal circuit of the engine located in the gas generator housing, in which a compressor, a combustion chamber with a cooling cavity and a turbine with a nozzle block and an air manifold are installed and interconnected in series, containing tubular recuperative heat exchanger located in the external engine circuit channel and connected by the cooled air supply and discharge channels made in the gas generator housing, with the internal engine circuit, wherein the recuperative heat exchanger tubes are located around the external circuit channel circumference, and each tube is connected with the cooled air supply and discharge channels, is made with at least one cantilever loop-shaped section located along the external circuit channel, and is fixed by its ends to the gas generator housing. By the cooled air supply channel each tube of the recuperative heat exchanger is connected to the combustion chamber cooling cavity, and by the cooled air outlet channel is connected to the turbine air manifold, and device is equipped with flexible banding elements for cantilever parts of loop-shaped tube sections, each flexible banding element is made in the form of at least one wire brace, the ends of which are fixed on one of the walls of the channel of the external circuit, and with the middle part wound at least one and a half turns on one of the cantilever parts of the loop-shaped section of the tube of the recuperative heat exchanger.

EFFECT: improving operating reliability of a recuperative heat exchanger due to minimization of mechanical, oscillatory and vibration actions on cantilevered loop-shaped sections of recuperative heat exchanger tubes.

3 cl, 5 dwg