KR101207902B1

KR101207902B1 - Variable Nozzle System With Thrust Vectoring

Info

Publication number: KR101207902B1
Application number: KR1020100115624A
Authority: KR
Inventors: 박동창; 이상연; 윤수진; 윤현걸
Original assignee: 국방과학연구소
Priority date: 2010-11-19
Filing date: 2010-11-19
Publication date: 2012-12-04
Also published as: KR20120054306A

Abstract

The present invention allows to control the size of the nozzle neck, but arranged in a circumferential direction a plurality of flap actuators that can be independently driven to control the variation and deflection of the thrust and to electrically drive the flap in each flap operation portion to mount the mounting space Regarding the variable nozzle system which can reduce the thrust deflection,
A plurality of flap actuators 10 arranged along the circumferential direction to change the size of the nozzle neck, wherein the flap actuators 10 are independently driven, and the flap actuators 10 are plate-shaped. Nozzle case 17, a flap connecting body 11 positioned inside the nozzle case 17 and moving in a central or radial direction to change the size of the nozzle neck, the nozzle case 17 and the flap. It is characterized in that it comprises a piezoelectric element driver (15, 15 ') installed between the connecting member 11 and electrically driven to move the flap connecting member 11 in the center direction or the radial direction.
Accordingly, thrust deflection can be controlled by changing thrust by changing the size of the nozzle neck by using a plurality of flap actuators arranged in the circumferential direction and controlling the flap actuators independently to change the roundness. The space is reduced and can be applied to small jet engines.

Description

Variable Nozzle System With Thrust Vectoring}

The present invention relates to a variable nozzle system capable of adjusting the size of a nozzle neck, and in particular, a plurality of flap actuators that can be driven independently are arranged in the circumferential direction to control the variation and deflection of thrust and to provide flaps at each flap actuator. The present invention relates to a variable nozzle system capable of thrust deflection that can be electrically driven to reduce mounting space.

In general, a jet engine burns fuel using air introduced into a combustion chamber through an air inlet and obtains propulsion by discharging the combustion gas generated through the exhaust nozzle. In cruise conditions where the flight altitude and speed of the jet engine are constant, the amount of air, the pressure and the temperature entering the air inlet and the combustion chamber are constant, so there is no need to change the nozzle neck size of the exhaust nozzle.

However, since the pressure and the temperature inside the jet engine are continuously changed in the ascending flight conditions, if the fixed nozzle neck is used, the size of the nozzle neck is designed to meet the low altitude conditions that are most required. However, at high altitudes, the air flow rate is small, so that the size of the nozzle neck does not need to be increased. As the size of the nozzle neck becomes larger, the fuel flow rate is unnecessarily increased and the engine efficiency is lowered.

Therefore, there is a need for a device that can be adjusted to have an optimal nozzle neck size in accordance with flight conditions. In addition, in order to increase or decrease the amount of fuel to increase or decrease the thrust, and the rapid flight speed and altitude change caused by the increase or decrease of the thrust, it is necessary to adjust the size of the nozzle neck, it is possible to control the nozzle with such a device It is called a nozzle.

The controllable nozzles are classified into three types. First, there is a two position controllable nozzle having two sizes of nozzle necks suitable for respective conditions in the ascending and cruising modes, and the three position nozzle with the long-term storage mode added to the two position nozzle. have. In addition, there is a Variable Area Nozzle or Variable Nozzle that enables the optimum nozzle neck size in all flight zones.

As shown in FIG. 1, a general variable nozzle is disposed in a circumferential direction, and a flap connecting body 51 for changing the size of the nozzle neck and a flap connecting body for driving the flap connecting body to change the size of the nozzle neck, respectively. A plurality of actuators 52, a nozzle base 53 disposed outside the flap connecting members to block a space between the flap connecting members 51, and the outside of the nozzle base 53. Link assembly (54) for connecting the flap connector and the actuator, and the nozzle case (55) for supporting the flap connector on the outside of the flap connector.

Here, the flap connecting member 51 is composed of a nozzle shrinker flap 51a which is disposed toward the center toward the outlet, and a nozzle extension flap 51b which is disposed toward the outside toward the outlet. The tip of the nozzle reduction flap and the tip of the nozzle extension flap are arranged so that a part thereof overlaps to interlock with each other.

In the conventional variable nozzle configured as described above, since the flap connecting body is driven by the driver to change the size of the nozzle neck, the size of the nozzle neck has higher efficiency than the fixed nozzle fixed, but the size of the nozzle neck is adjusted. Due to the various devices for increasing the weight and volume, there is a disadvantage that a device for generating the power required for this is required.

In addition, in the above-mentioned conventional variable nozzle, the driver uses a hydraulic drive method, but the hydraulic drive method has a problem in that a large mounting space occupies a large volume occupied by the hydraulic generator and the hydraulic pipe. Of course, it is also possible to use an electric drive method other than the hydraulic drive method, but in order to obtain the driving force of the same size, a larger driver is required than the driver of the hydraulic drive method, there is a problem that can not be applied in the small variable nozzle.

The present invention has been made to solve the above-mentioned conventional problems, by using an electrically driven piezoelectric element as a drive device for varying the size of the nozzle neck to reduce the mounting space by miniaturizing the device, and configure the nozzle It is an object of the present invention to provide a variable nozzle system capable of thrust deflection that allows a plurality of flap actuators to be independently driven to control a variable thrust and a deflection.

In addition, an object of the present invention is to provide a variable nozzle system capable of thrust deflection to reduce the number of actuators required by allowing the flap connecting body consisting of the nozzle reduction flap and the nozzle extension flap to operate in conjunction with each other.

The present invention also provides a variable nozzle system capable of thrust deflection in which the nozzle reduction flap and the nozzle extension flap are rotatably installed at both ends of the nozzle case so that the size of the nozzle neck is naturally enlarged or reduced according to the operation of the actuator. The purpose is to provide.

In addition, an object of the present invention is to provide a variable nozzle system capable of thrust deflection capable of minimizing the thermal effect of the combustion gas by placing a piezoelectric element driver at both ends of the nozzle.

Thrust deflection variable nozzle system of the present invention for achieving the above object is disposed along the circumferential direction and each drive independently and includes a plurality of flap operation portion for changing the size of the nozzle neck, the flap operation portion plate A nozzle case having a shape, a flap connector located inside the nozzle case and moving in a central or radial direction to change the size of the nozzle neck, and installed and electrically driven between the nozzle case and the flap connector, It characterized in that it comprises a piezoelectric element driver for moving the flap connecting member in the center direction or the radial direction.

In addition, according to the variable nozzle system capable of thrust deflection of the present invention, the flap connecting body is disposed so as to face toward the center toward the outlet, and the nozzle reduction flap of the end portion bent in the radial direction, and toward the outlet toward the outside A nozzle extension flap disposed so as to face a portion and bent in a central direction, the nozzle extension flap overlapping a part of the nozzle reduction flap, and the nozzle reduction flap and the nozzle extension flap so that the nozzle extension flap interlocks with each other. And a flap connecting link connecting the secondary flaps.

In addition, according to the variable nozzle system capable of thrust deflection of the present invention, the front end of the nozzle reduction flap and the end of the nozzle expansion flap is characterized in that coupled through the flap hinge at each end of the nozzle case, respectively. .

In addition, according to the variable nozzle system capable of thrust deflection of the present invention, the piezoelectric element driver is installed on the outside of the flap hinge.

In addition, according to the variable nozzle system capable of thrust deflection of the present invention, the piezoelectric element driver may be installed at either the front position or the rear position of the nozzle case, or may be installed at both the front position and the rear position of the nozzle case. It features.

The variable nozzle system capable of thrust deflection according to the present invention uses a plurality of flap actuators arranged in the circumferential direction to adjust thrust by changing the size of the nozzle neck, and to change the roundness by controlling each flap actuator independently. Thrust deflection can be controlled.

In addition, according to the variable nozzle system capable of thrust deflection of the present invention, by using a piezoelectric element electrically driven as a means for operating the flap connector, it can be mounted in a narrow space and thus can be applied to a small jet engine. .

Further, according to the variable nozzle system capable of thrust deflection of the present invention, since the nozzle reduction part flap and the nozzle expansion part flap overlap each other in a bent state and are connected to each other by a flap connecting link, the nozzle reduction part flap and the nozzle extension part The flaps are interlocked with each other to reduce the number of driving devices.

1 is a perspective view showing a conventional variable nozzle.
Figure 2 is a configuration diagram showing the flap operating portion applied to the variable nozzle system capable of thrust deflection of the present invention.
Figure 3 is a side view of the flap operation portion of the main configuration of the present invention.
4 is a reference diagram for explaining a concept of the thrust deflection applied to the present invention.

Hereinafter, a variable nozzle system capable of thrust deflection of the present invention will be described with reference to the accompanying drawings.

The variable nozzle system capable of thrust deflection of the present invention includes a plurality of flap actuators 10 arranged along the circumferential direction to change the size of the nozzle neck, and the flap actuators 10 are independently driven. It is configured to be.

As shown in FIGS. 2 and 3, the flap operation part 10 is positioned inside the plate-shaped nozzle case 17 and the nozzle case 17 and moves in the center direction or the radial direction of the nozzle neck. A flap connecting member 11 for changing a size, and installed and electrically driven between both ends of the nozzle case 17 and the flap connecting member 11 to move the flap connecting member 11 in a central or radial direction. Front and rear piezoelectric element drivers 15 and 15 'to be moved to each other.

The piezoelectric element drivers 15 and 15 ′ use piezoelectric elements that expand or contract according to electrical signals. There are various types of piezoelectric elements according to their use, and the range of operating temperature is wide accordingly. In some cases, there are piezoelectric elements that can be used even at a high temperature of 650 ° C. There is also an element. Accordingly, the piezoelectric element drivers 15 and 15 ′ are manufactured using piezoelectric elements that can withstand high temperature and high pressure.

The flap connecting member 11 is disposed so as to face toward the center toward the outlet, and has a nozzle reduction flap 12 bent in a radial direction and a portion of the end thereof is bent toward the outside toward the outlet and bent toward the center. The nozzle reduction part 13 so that a tip portion overlaps a part of the nozzle reduction part flap 12, and the nozzle reduction part flap 12 and the nozzle extension part flap 13 interlock with each other. A flap connecting link 14 connecting the flap 12 and the nozzle extension flap 13.

At this time, the front end of the nozzle reduction flap 12 and the end of the nozzle expansion flap 13 can be rotated at both ends of the nozzle case 17 by the front and rear flap hinges 16 and 16 '. To be combined. The front / rear piezoelectric element drivers 15 and 15 'are preferably provided outside the front and rear flap hinges 16 and 16'.

In the above description, the piezoelectric element drivers 15 and 15 ′ are installed at both the front position and the rear position of the nozzle case 17, but only at either the front position or the rear position of the nozzle case 17. It may be installed.

The thrust deflection variable nozzle system of the present invention configured as described above enlarges or reduces the size of the nozzle neck by moving the flap connecting body in the center direction or the radial direction using a piezoelectric element driver, and independently controls each flap operation part. Thrust deflection is controlled by changing the roundness.

When power is applied to the piezoelectric element drivers 15 and 15 'provided at at least one of the front end positions or the rear end positions of the nozzle case 17, the piezoelectric elements in the piezoelectric element drivers 15 and 15' are driven in the forward direction. Or the reverse pressure is generated. The piezoelectric element drivers 15 and 15 ′ use this pressure to move the flap connector 11 in the center direction or the radial direction of the nozzle.

At this time, since the nozzle shrinker flap 12 and the part of the nozzle expander flap 13 constituting the flap connecting body 11 overlap each other and are connected to each other by the flap connecting link 14, the nozzle shrinker flap Even if only one of the 12 and the nozzle extension flap 13 is moved, the other moves in conjunction. Therefore, even if the piezoelectric element drivers 15 and 15 ′ are installed at either one of both ends of the nozzle case 17, the size of the nozzle neck can be enlarged or reduced. In particular, when the piezoelectric element drivers 15 and 15 'are installed at both ends of the nozzle case 17, the response becomes faster, and the thrust is changed as the size of the nozzle neck is enlarged or reduced.

Meanwhile, flap hinges 16 and 16 'connecting the nozzle shrinker flap 12 or the nozzle expander flap 13 and the nozzle case 17 are provided near the end of the nozzle case 17. As the piezoelectric element drivers 15 and 15 ′ are installed on the outside of the piezoelectric element drivers, the flap hinges 16 and 16 ′ cause the movement of the piezoelectric element drivers 15 and 15 ′ not to be large. The nozzle reduction flap 12 or the nozzle extension flap 13 moves largely to expand or reduce the size of the nozzle neck.

And, as each flap operation unit 10 operates independently, it is possible to control the thrust deflection by changing the roundness and concentricity of the nozzle. That is, as shown in FIG. 4, if the roundness is adjusted in the shape of an ellipse rather than the round shape, or the concentricity is adjusted so that the nozzle center O 'is out of the original center O, the thrust is directional. In addition, thrust deflection may be controlled using each flap operation unit 10 that operates independently.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, Changes will be possible.

10: flap actuator
11: flap connector
12: Nozzle reduction flap
13: Nozzle extension flap
14: flap connection link
15, 15 ': piezoelectric element driver
16, 16 ': flap hinge
17: nozzle case

Claims

A plurality of flap actuators 10 arranged along the circumferential direction to vary the size of the nozzle neck,
The flap actuators 10 are driven independently of each other,
The flap actuator 10 is a plate-shaped nozzle case 17 and a flap connecting member 11 located inside the nozzle case 17 and moving in a central or radial direction to change the size of the nozzle neck. And a piezoelectric element driver 15 (15 ') installed between the nozzle case 17 and the flap connecting member 11 and electrically driven to move the flap connecting member 11 in the center direction or the radial direction. Including,
The flap connecting member 11 is disposed so as to face toward the center toward the outlet, and has a nozzle reduction flap 12 bent in a radial direction and a portion of the end thereof is bent toward the outside toward the outlet and bent toward the center. The nozzle reduction part 13 so that a tip portion overlaps a part of the nozzle reduction part flap 12, and the nozzle reduction part flap 12 and the nozzle extension part flap 13 interlock with each other. Thrust deflection variable nozzle system, characterized in that it comprises a flap connecting link (14) connecting the flap (12) and the nozzle extension flap (13).

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The method of claim 1,
The tip of the nozzle reduction flap 12 and the end of the nozzle extension flap 13 are coupled at both ends of the nozzle case 17 via flap hinges 16 and 16 ', respectively. Variable nozzle system capable of thrust deflection.

The method of claim 3,
The piezoelectric element driver (15) (15 ') is a thrust deflection variable nozzle system, characterized in that installed on the outside of the flap hinge (16, 16').

The method according to any one of claims 1, 3, and 4,
The piezoelectric element drivers 15 and 15 ′ are installed at either the front position or the rear position of the nozzle case 17, or are installed at both the front position and the rear position of the nozzle case 17. Variable nozzle system capable of thrust deflection.