RU2456468C1 - Working medium carry-over system for swivel nozzle of jet turbine engine - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: working medium carry-over system for all-aspect swivel nozzle of jet turbine engine includes two hollow levers and two hollow hinge assemblies rigidly fixed by means of eye lugs enveloping hollow sleeves, one is on fixed housing of engine nozzle, and the other one is on its movable housing. One end of each hollow lever is connected to the corresponding hollow hinge assembly, and their opposite ends are connected to each other by means of additional hollow hinge with hollow cross piece connecting the cavities of levers. One lever is installed in hinges with possibility of being turned in radial guide in the plane perpendicular to horizontal rotation axis of nozzle, and the other one is installed in two mutually perpendicular planes. Attachment of movable and fixed housings is made so that their connection point can be moved along spherical surface in any direction relative to fixed nozzle housing.

EFFECT: invention allows improving reliability of working medium carry-over system from engine to all-aspect jet nozzle.

2 cl, 6 dwg

Description

The invention relates to aircraft engine manufacturing, and in particular to systems for transferring the working fluid for rotary nozzles mounted on turbojet engines.

A known system of transfer of the working fluid for the rotary nozzle of a turbojet engine. This system consists of two hollow hinges that are rigidly fixed, one on the stationary housing of the engine nozzle, the other on the movable housing, telescopically connected to each other. This connection allows you to transfer the working fluid when the nozzle is rotated in one plane of rotation, combining two movements - rotational and reciprocating. Two systems are placed on both sides of the longitudinal axis of the rotary nozzle in the zone of its rotation (see RF patent No. 2250383, class F02K 1/78, published on January 27, 2008).

The known device has the ability to move only in one plane and, therefore, does not allow to transfer the working fluid from the engine systems to the systems of the all-round jet nozzle, which changes the thrust vector simultaneously in two planes - in the vertical and horizontal.

The objective of the invention is to ensure independence from each other of the rotation of the jet nozzle in two mutually perpendicular planes with the reliable operation of systems for transferring the working fluid from the engine to an all-angular rotary jet nozzle with a large number of rotation cycles of the jet nozzle.

This problem is solved by the fact that the known system for transferring the working fluid for a rotary nozzle of a turbojet engine, comprising connecting two hollow hinge assemblies rigidly fixed by eyes covering hollow sleeves, one on the stationary housing of the engine nozzle and the other on its movable housing, for all-angle the nozzle is provided with two hollow levers, one end of each of which is connected to the corresponding hollow hinge assembly, and their opposite ends are connected by an additional hollow hinge m with a hollow jumper connecting the cavity of the levers, and one lever is mounted in hinges with the possibility of rotation in a radial guide in a plane perpendicular to the horizontal axis of rotation of the nozzle, and the other in two mutually perpendicular planes, while the connection of the movable and fixed bodies is made with the possibility of movement points of their articulation on a spherical surface in any direction relative to the stationary nozzle body.

Preferably, the hinge mounted on the movable nozzle body is provided with a hollow plug, one end of which is inserted into the groove of the sleeve of the hollow lever and the other into the groove of the sleeve of the hinge body installed in the eye of the movable nozzle body.

This embodiment of the device allows the transfer of the working fluid from the engine systems to an all-round jet nozzle, which changes the thrust vector both in the vertical and horizontal planes, ensuring reliable transfer with a large number of nozzle rotation cycles. In addition, the system eliminates the mutual longitudinal movement of the articulated joints, which increases the reliability of its operation by reducing the wear of its elements.

Figure 1 shows the layout of systems in the plane of the longitudinal axis of the engine;

figure 2 is a section aa of the system in the radial direction;

figure 3 is a section bB hinge mounted on a fixed nozzle body;

figure 4 is a section bb of the hinge along the axis of rotation of the hollow lever;

figure 5 is a section GG of the hinge mounted on the movable body of the nozzle with a pipeline for supplying a working fluid;

Fig.6 is a diagram of the operation of transfer systems located on one side of the longitudinal axis of the nozzle.

The system for transferring the working fluid for an all-round rotary jet nozzle contains three hollow hinges 1, 2, 3, connected hydraulically (pneumatically) by means of two hollow levers 4, 5. The hollow elbow 6 of the hinge assembly 1 communicates with the pipeline 7 for supplying the working fluid of the engine, and the nozzle 8 - with a pipeline 9 for supplying a working fluid on the rotary housing 10 of the jet nozzle. The internal cavities of the levers 4 and 5 communicate through a T-shaped hollow sleeve 11 and a jumper 12 with a support bracket 13 of the hinge 2. The end of the lever 4 through the hollow bracket 6 and the eyes 14 of the hinge 1 is connected to the fixed housing 15 of the jet nozzle of the engine. The free end of the lever 5 is connected through the housing 16 of the hinge 3 with the rotary housing of the nozzle 10 through the eye 17. The eyes 14 and 18 cover the hollow bushings 19 and 20, which are the end of the levers 4 and 5. The lever 4 is placed in the hinges for rotation in a plane perpendicular to the axis nozzle, along the guide 21, and the lever 5 - in two mutually perpendicular planes, relative to the axis 22 of the engine. In the hollow square 6, the reference angle 13 and the nozzle 8 are made radial holes 23 for the passage of the working fluid. The fitting 8 is rigidly connected to the pipe 9 for supplying the working fluid of the nozzle. The hinge 3 is provided with a hollow plug 24 with radial holes 23, one end of which is inserted into the groove 25 of the hollow lever 5, while fixing the position of the housing 16 in the eye 18. The other end of the hollow fork 24 is inserted into the groove 26 of the housing 16 of the hinge 3. The position of the housing 16 in the eye 17 of the rotary housing 10 of the nozzle is fixed by the nozzle 8, providing a hydraulic (pneumatic) connection.

The device operates as follows. When shifting the jet nozzle, the rotary housing 10 together with the nozzle 8 moves in space along a spherical path relative to the center of rotation of the rotary jet nozzle, while the communications of the jet nozzle associated with the nozzle 8 occupy the corresponding spatial position, and the communications located on the fixed nozzle body remain in a static position.

The working fluid (kerosene or air) from the engine enters the hollow square 6 of the hinge 1 and through the radial holes 23 - into the hollow sleeve 19 and into the internal cavity of the lever 4. The latter rotates along the guide 21 around the hollow square 6 of the hinge 1 together with the hinge 2. The lever 5, having a hinge 2 at one end and a hinge 3 at the other end, together with the lever 4, rotates around the hollow elbow 6 of the hinge 1 and can simultaneously swing in a plane perpendicular to the axis of the support elbow 13 of the hinge 2.

The hinge 3, located on the opposite end of the lever 5, repeats the movement of the rotary jet nozzle and forces the lever 5 to rotate in two mutually perpendicular planes.

The working fluid through the radial holes 23 of the hollow square 6, the eye 14, the jumper 12 and the holes 23 of the reference angle 13 of the hinge 2 enters the internal cavity of the lever 5, and from it through the radial holes 23 of the nozzle 8 into the system of the movable housing 9 of the rotary jet nozzle. Seal elements 27 installed in each swivel provide reliable waterproofing (pneumatic isolation) of the system.

The implementation of the invention will ensure reliable operation of the system of transfer of the working fluid from the engine to an all-round jet nozzle.

Claims (2)

1. A system for transferring a working fluid for a rotary nozzle of a turbojet engine, comprising a connection of two hollow hinge assemblies rigidly fixed by means of eyes covering hollow bushes, one on the stationary housing of the engine nozzle and the other on its movable housing, characterized in that for the multi-angle nozzle it is equipped with two hollow levers, one end of each of which is connected to the corresponding hollow hinge assembly, and their opposite ends are connected by an additional hollow hinge with a hollow jumper oh, connecting the cavity of the levers, and one lever is mounted in hinges with the possibility of rotation in the radial guide in a plane perpendicular to the horizontal axis of rotation of the nozzle, and the other in two mutually perpendicular planes, while the connection of the movable and fixed bodies is made with the possibility of moving the point of their articulation on a spherical surface in any direction relative to the stationary nozzle body. 2. The system of transferring the working fluid for the rotary nozzle according to claim 1, characterized in that the hinge mounted on the movable body of the nozzle is provided with a hollow plug, one end of which is inserted into the groove of the sleeve of the hollow lever and the other into the groove of the sleeve of the hinge body installed in the eye of the movable nozzle body.

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