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Axisymmetric convergent and divergent exhaust nozzle

An axisymmetric nozzle technology, applied to jet propulsion devices, machines/engines, etc., can solve problems such as weak stealth ability, inability to block front-end hot-end components, and affect nozzle throat adjustment range, etc., to achieve high reliability, The effect of simple structure and good stealth ability

Active Publication Date: 2014-04-02
AECC SHENYANG ENGINE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the internal hollow structure of the traditional aero-engine axisymmetric retractable nozzle, it cannot effectively shield the front-end hot-end components, resulting in very weak stealth ability
The conventional axisymmetric plug nozzle only adds a closed center body in 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, which affects the engine. working point

Method used

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  • Axisymmetric convergent and divergent exhaust nozzle
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  • Axisymmetric convergent and divergent exhaust nozzle

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Effect test

Embodiment 1

[0035] The invention provides an axisymmetric retractable nozzle, which is characterized in that it 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:

[0036] The front end of the barrel 1 is connected to the engine as a supporting member for the entire nozzle;

[0037] The drive adjustment mechanism is mainly composed of an actuator 2, a synchronous adjustment ring 3, a pull rod 4, a convergence adjustment piece 5, an air pressure actuator 6 and an expansion adjustment piece 8; wherein, the actuator 2 is arranged along the circumference of the nozzle, and the front end passes through The mechanical connection is connected to the outer wall of the barrel 1, 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 the rotating pair; The outer middle section of the adj...

Embodiment 2

[0057] The invention provides an axisymmetric retractable nozzle, which is characterized in that it 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:

[0058] The front end of the barrel 1 is connected to the engine as a supporting member for the entire nozzle;

[0059] The drive adjustment mechanism is mainly composed of an actuator 2, a synchronous adjustment ring 3, a pull rod 4, a convergence adjustment piece 5, an air pressure actuator 6 and an expansion adjustment piece 8; wherein, the actuator 2 is arranged along the circumference of the nozzle, and the front end passes through The mechanical connection is connected to the outer wall of the barrel 1, 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 the rotating pair; The outer middle section of the adjus...

Embodiment 3

[0079] The invention provides an axisymmetric retractable nozzle, which is characterized in that it 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:

[0080] The front end of the barrel 1 is connected to the engine as a supporting member for the entire nozzle;

[0081] The drive adjustment mechanism is mainly composed of an actuator 2, a synchronous adjustment ring 3, a pull rod 4, a convergence adjustment piece 5, an air pressure actuator 6 and an expansion adjustment piece 8; wherein, the actuator 2 is arranged along the circumference of the nozzle, and the front end passes through The mechanical connection is connected to the outer wall of the barrel 1, 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 the rotating pair; The outer middle section of the adj...

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Abstract

The invention relates to an axisymmetric convergent and divergent exhaust nozzle. The exhaust nozzle is characterized by mainly consisting of a cylinder, a driving adjusting mechanism, a sealing component, a center shielding component and an outer fairing component, wherein the front end of the cylinder is connected with an engine to serve as a support component of the whole exhaust nozzle, the driving adjusting mechanism mainly consists of action cylinders, a synchronous adjusting ring, pull rods, convergent flaps, air pressure action cylinders, and divergent flaps, the sealing component mainly consists of a convergent sealing sheet and an divergent sealing sheet, and is mainly used for sealing the air flow in the exhaust nozzle, and the divergent sealing sheet is positioned in the inner sides of the circumferentially distributed divergent flaps and between the circumferentially distributed divergent flaps, and is connected with the divergent flaps at the two adjacent sides through a conventional cooperation pressing mechanism. The axisymmetric convergent and divergent exhaust nozzle has the advantages that the influence on the area adjusting range of a throat pipe of the conventional axisymmetric convergent and divergent exhaust nozzle is avoided, the good hiding capability is realized, the defect of hiding function of the conventional axisymmetric convergent and divergent exhaust nozzle is overcome, meanwhile, the structure is simple, and the reliability is high.

Description

technical field [0001] The invention relates to the field of aero-engine nozzles, in particular to an axisymmetric retractable nozzle. Background technique [0002] Due to the internal hollow structure of the traditional aero-engine axisymmetric retractable nozzle, it cannot effectively shield the front-end hot-end components, resulting in very weak stealth ability. The conventional axisymmetric plug nozzle only adds a closed center body in 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, which affects the engine. working point. Therefore, in order to make up for the determination of the conventional axisymmetric diverging nozzle and the conventional axisymmetric plug nozzle, it is necessary to design an axisymmetric diverging nozzle with good stealth ability without affecting the nozzle throat area adjustment range. Contents of the invention [0...

Claims

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Application Information

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