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Novel axial-symmetry convergent nozzle

An axisymmetric, nozzle technology, applied in the direction of jet propulsion, machine/engine, etc., can solve the problem of affecting the adjustment range of the nozzle throat, not being able to block the front hot end components, affecting the engine operating point, etc., to make up for the stealth function. Flaws, good stealth, simple effect

Active Publication Date: 2014-12-10
AECC SHENYANG ENGINE RES INST
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  • Claims
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AI Technical Summary

Problems solved by technology

[0002] Due to the internal hollow structure of the traditional aero-engine axisymmetric convergent nozzle, it cannot effectively shield the front-end hot-end components, resulting in very weak stealth capabilities
The conventional axisymmetric plug-type converging nozzle only adds a closed center body at the center of the nozzle, but due to the large cross-sectional area of ​​the closed center body, it seriously affects the adjustment range of the throat area of ​​the nozzle, resulting in a operating point of the engine

Method used

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Embodiment

[0029] A new type of axisymmetric converging nozzle is mainly composed of a cylinder body 1, a drive adjustment mechanism, a sealing member, a central blocking member and an external rectifying member. Specifically:

[0030] The front end of the cylinder body 1 is connected with the engine as a supporting member for the entire nozzle.

[0031] The drive adjustment mechanism is mainly composed of actuator cylinder 2, synchronous adjustment ring 3, pull rod 4 and convergence adjustment piece 5. Wherein, the actuator cylinder 2 is arranged along the circumference of the nozzle, the front end is connected to the outer wall of the cylinder body 1 through a mechanical connection, and the rear end is connected to the synchronous adjustment ring 3; the rear end of the synchronous adjustment ring 3 is connected to the pull rod 4 through a rotating pair; The tie rod 4 is evenly distributed along the nozzle pipe circumference, and the other end is connected to the outer middle section ...

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Abstract

The invention provides a novel axial-symmetry convergent nozzle. The novel axial-symmetry convergent nozzle mainly consists of a cylinder (1), an actuator cylinder (2), a pull rod (4), a convergent adjusting piece (5), a convergent sealing piece (6), a conical section outer adjusting piece (7), a thin-wall cyclonal center body (10) and a bracket (11), wherein the front end of the transition section cylinder (1) is connected with an engine to serve as a support component of the whole nozzle; the actuator cylinder (2), the pull rod (4) and the convergent adjusting piece (5) serve as throat and outlet area bearing adjusting components for adjusting throat and outlet areas; and the thin-wall cyclonal center body (10) is used for shielding a front end component to realize excellent invisibility function of the nozzle. The novel axial-symmetry convergent nozzle dose not influence the throat area adjusting range of a conventional axial-symmetry convergent nozzle, has excellent invisibility, makes up the invisibility defect of the conventional axial-symmetry convergent nozzle, and has the advantages of simple structure and high reliability.

Description

technical field [0001] The invention belongs to the field of aeroengine nozzles, relates to a novel axisymmetric convergent nozzle, and is also applicable to the field of aerospace engine nozzles in demand. Background technique [0002] Due to the internal hollow structure of the traditional aero-engine axisymmetric convergent nozzle, it cannot effectively shield the front-end hot-end components, resulting in very weak stealth ability. The conventional axisymmetric plug-type converging nozzle only adds a closed center body at the center of the nozzle, but due to the large cross-sectional area of ​​the closed center body, it seriously affects the adjustment range of the throat area of ​​the nozzle, resulting in a operating point of the engine. Therefore, in order to make up for the shortcomings of conventional axisymmetric converging nozzles and conventional axisymmetric plug-type converging nozzles, it is necessary to design a new type of axisymmetric converging nozzle with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K1/11F02K1/78
Inventor 赵春生徐速王伟
Owner AECC SHENYANG ENGINE RES INST
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