TURBOJET ENGINE ROTARY AXISYMMETRIC NOZZLE Russian patent published in 2019 - IPC F02K1/04 F02K1/78 

FIELD: aviation.

SUBSTANCE: invention relates to the aviation equipment turbojet engines, in particular to the jet nozzles design. Rotary axisymmetric nozzle of turbojet engine includes fixed housing, movable housing, control hydraulic cylinders, as well as pneumatic cylinders. Fixed housing is made with two additional supports on its outer surface side, and movable housing is located between them and is pivotally connected to fixed housing in two diametrically opposite centres pins. Each pin is fixed in radial holes of fixed housing and additional support. Control hydraulic cylinders are hinged on one side on fixed housing, and on other side - on movable housing. Pneumatic cylinders are hinged on one side on stationary housing, and on the other - on the movable and arranged in pairs in the pins installation area so that the pneumatic cylinders of each pair are located on opposite sides from the pin of the pin. In rodless cavity of pneumatic cylinders near places of their fixation holes are made, and rod cavity of pneumatic cylinders is connected to high pressure compressor with possibility to create force P_c by pneumatic cylinders, opposite in direction to axial force P_af gas flow acting on moving nozzle housing.

EFFECT: invention allows increasing service life of rotary axisymmetric nozzle due to increased serviceability of hinged connection of fixed housing with movable housing under conditions of large axial loads and with large number of nozzle turning cycles.

1 cl, 3 dwg