ADJUSTABLE TURBOJET NOZZLE Russian patent published in 2022 - IPC F02K1/12 

FIELD: turbojet engines.

SUBSTANCE: invention relates to the design of adjustable nozzles of turbojet engines. Adjustable nozzle of a turbojet engine contains a housing with a shell, side walls, supersonic flaps hinged on subsonic flaps, a flap control system connected to subsonic flaps and supersonic flaps by means of control mechanisms. The nozzle is equipped with at least two mechanisms for increasing the rigidity of the body, two horizontal and two vertical power beams, as well as six traverses fixed outside the body, three in the upper and lower parts. Control mechanisms are mounted on traverses and pivotally connected to them. The hull is made as a composite of the front and rear parts and includes a sequentially located inlet flange, a force belt connection with the aircraft, two external transverse frames made with their perimeter in the shape of the hull shell, a transverse flange connection of the two parts of the hull located in its central part, three external transverse frame, made in the form of a hull shell, and an output flange. At least one of the frames is made with the possibility of contact with at least two traverses. Vertical and horizontal power beams are fixed on the corresponding straight sections of the output flange by means of movable joints. The traverses are fixed on the body by means of horizontal power beams with their back part. Each mechanism for increasing the rigidity of the body includes a bracket mounted on a transverse flange connection of two parts of the body, and a beam, which is hinged with its central part on the corresponding vertical power beam. One end of each of the beams is connected to the housing by means of a bracket, and the other end is connected to the corresponding side wall, with the possibility of shifting the ends of the beams relative to the bracket and the side wall along the longitudinal axis of the nozzle.

EFFECT: increase in the efficiency of the nozzle and the gas turbine engine as a whole.

3 cl, 1 dwg