ADJUSTABLE NOZZLE Russian patent published in 2017 - IPC F02K1/12 

FIELD: machine building.

SUBSTANCE: adjustable supersonic nozzle comprises a casing subsonic and supersonic doors forming a channel for the combustion products outflow pivotally mounted on it, doors drive and synchronization mechanism. The nozzle casing is made of two tightly coupled cylindrical and monoconic shells with a sealing ensuring tightness on the outer side of the casing. The area of the inlet and outlet nozzle sections is unregulated, and subsonic and supersonic doors are pivotally fixed to the nozzle casing. Subsonic doors, kinematically connected with doors drive and corresponding supersonic doors are leading. Supersonic and subsonic leading doors bonded together in pairs by free ends via a rotation axis disposed in the leaf made in the door, with the possibility of longitudinal movement. The nozzle drive is designed as axles, forks, cylinders with pistons and the power synchronizing rings with rollers resting on the nozzle casing. Hydraulic cylinders are combined with headers connecting the respective cavities of hydraulic cylinders into the ring, and is pivotally fixed to the nozzle casing by means of rotation axles. Power synchronizing ring is pivotally bonded through the rotation axis all piston rods of the hydraulic cylinders with the ability to move longitudinally along the nozzle axis. Subsonic doors holdfast joints fixed by the polyhedron on the nozzle casing, plugs, rotation axles, and rods fastened with subsonic leading doors on one side and power synchronization ring with the other, are part of the synchronization mechanism.

EFFECT: invention allows to simplify the design, reduce weight and dimensions of the adjustable nozzle, improve the reliability of its operation, reduce the thrust vectoring of the nozzle axis, increase the control range of the critical section of the nozzle and ensure the tightness in his external contour.

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