CN218180244U

CN218180244U - Air cannon

Info

Publication number: CN218180244U
Application number: CN202222282523.2U
Authority: CN
Inventors: 李从富; 刘志强; 王成棕
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-12-30
Anticipated expiration: 2032-08-29

Abstract

The utility model provides an air cannon, it is including shell removing device and barrel, air cannon still includes the pressure release pipe, the pressure release pipe is located between shell removing device and the barrel, all be formed with the passageway that supplies the bird bullet flight in pressure release pipe, shell removing device and the barrel, the intercommunication has still been seted up on the pressure release pipe the pressure release hole of passageway, the pressure release hole with the contained angle of bird bullet flight direction is greater than 0 and is less than 180. During the test, the bird bomb is arranged in the bomb support, the bird bomb and the bomb support slide in the channel under the pushing of the compressed gas, and the pressure release hole can release the high-pressure gas in the pressure release pipe before the bird bomb encounters the shell releasing device to release the shell, so that the interference of the residual gas on the bird bomb is reduced.

Description

Air cannon

Technical Field

The utility model relates to a bird hits experimental field, concretely relates to air bubble.

Background

Bird collision accidents are important factors threatening fast running tools such as airplanes and high-speed rails, the wind shield, the radome, the engine, the front edge and the tail edge of the wing and the wind shield part of the high-speed rail are easy to suffer from bird collision danger, relevant laws and standards such as airworthiness and the like all require the development of bird collision resistance analysis and verification, and bird collision resistance tests are important methods for evaluating and verifying airplanes and high-speed rails.

The Chinese invention patent (publication No. CN 201196551Y) discloses a shelling device for a shell for a bird strike test, wherein during a bird strike test, a large amount of gas is popped out together with a bird from a muzzle, the flying posture of the bird after being popped out of a barrel is influenced, a bullet holder needs to be blocked after a bird bullet body is launched out, the bullet holder cannot fly out together with the bird bullet at a high speed, otherwise, fragments of the bullet holder can influence the test, and meanwhile, additional load can be additionally added to a test piece to influence the test result.

In addition, in order to simulate a high-speed bird impact test, the magazine and carrier separating device is usually designed to be relatively heavy, and the magazine needs to be taken out after each shooting, which results in time and labor consuming assembly and disassembly.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide an air bubble in order to overcome the defect that the gas in the big gun barrel influences the bird bullet flight trajectory among the prior art.

The utility model discloses an above-mentioned technical problem is solved through following technical scheme: an air cannon comprises a shell withdrawing device, a cannon barrel and a pressure release pipe, wherein the pressure release pipe is located between the shell withdrawing device and the cannon barrel, channels for bird bullets to fly are formed in the pressure release pipe, the shell withdrawing device and the cannon barrel, pressure release holes communicated with the channels are further formed in the pressure release pipe, and the included angle between each pressure release hole and the bird bullet flying direction is larger than 0 degree and smaller than 180 degrees.

In the scheme, during the test, the bird bomb is arranged in the bomb support, the bird bomb and the bomb support slide in the channel under the pushing of the compressed gas, and before the bird bomb encounters the shell withdrawing device, the pressure releasing hole can release the high-pressure gas in the pressure releasing pipe, so that the interference of the residual gas on the bird bomb is reduced.

Preferably, the pressure release hole is opened on a side surface of the pressure release pipe.

In the scheme, the pressure release hole is conveniently formed in the side face of the pressure release pipe and has a certain distance with other structures, high-pressure residual gas is laterally released on the side face of the pressure release pipe through the pressure release hole, and interference of the high-pressure gas on other structures can be avoided.

Preferably, the pressure relief hole is arranged away from the shell remover.

In the scheme, the structure arrangement increases the flying distance of the bird bomb in the pressure release pipe after passing through the pressure release hole, and the pressure release hole can release high-pressure residual gas for more time, so that the interference of the high-pressure residual gas on the bird bomb is further reduced.

Preferably, the air cannon further comprises:

the number of the guide rods is at least two, and the guide rods are fixed on the pressure release pipe or the gun barrel and are arranged in parallel with the gun barrel;

the limiting piece is arranged on the guide rod in a sliding mode and used for limiting the shell withdrawing device along the direction far away from the pressure release pipe;

the compression spring is sleeved on the guide rod, one end of the compression spring is abutted to the limiting part, and the compression spring is used for providing acting force towards the direction of the gun barrel for the limiting part.

In this scheme, the bird bullet that flies at a high speed and bullet support and shell ware bump, and the bullet holds in the palm takes place radial deformation along shell ware appearance that moves back, and the cover is being moved back on the shell ware, moves back the shell ware and will strike kinetic energy and transmit to compression spring through the locating part and be transformed into spring potential energy, and compression spring absorbs unnecessary impact kinetic energy to reduce the impact to other structures.

Preferably, the air cannon further comprises a detachable limiting nut mounted on the guide rod, the limiting nut abuts against the other end of the compression spring, and the limiting nut is used for limiting the compression spring.

In this scheme, the bird hits experimental back, only needs to dismantle stop nut, with compression spring, locating part and move back shell ware along bird bullet direction of flight from the guide bar, can hold in the palm the discarded bullet and take out, dismantle simply, be convenient for take out the bullet and hold in the palm.

Preferably, the air cannon further comprises a gasket, and the gasket is arranged between the limiting nut and the compression spring.

In this scheme, this structural setting, the huge impact that bears between compression spring and the stop nut can be alleviated to the gasket, prolongs compression spring and stop nut's life.

Preferably, the shell remover has a flange facing the limiting member, an end surface of the limiting member abuts against the flange, and a side surface of the limiting member is attached to a side surface of the shell remover.

In this scheme, move back the impact kinetic energy of shell ware and transmit to the locating part through the flange, the side of locating part and the side laminating of moving back the shell ware moreover, move back the shell ware side direction by the locating part spacing, move back the shell ware and be blocked between pressure-releasing pipe and locating part, when playing with the bird and bullet support and bumping, avoid taking place the skew.

Preferably, the stopper includes:

the sliding part is sleeved on the guide rod;

the limiting part is abutted to the flange, and the thickness of the limiting part in the sliding direction is larger than that of the sliding part in the sliding direction.

In this scheme, when the locating part bumps with the ware of moving back and takes place to strike, the impact kinetic energy that spacing portion relative slip portion bore is bigger, through the thickness of increase spacing portion, can improve the shock resistance of locating part.

Preferably, the guide rod is fixed at one end of the pressure release pipe close to the shell extractor.

In this scheme, when receiving the impact, the locating part slides on the guide bar, because the locating part is more close to the position that guide bar and pressure release pipe are connected on the guide bar, reduces the moment that the guide bar bore, improves the life-span of guide bar.

Preferably, the air cannon further comprises a fixing flange and a limiting block, the guide rod is fixed on the pressure release pipe through the fixing flange, the limiting block is arranged between the fixing flange and the limiting block, and when the shell withdrawing device is located at an initial position, the limiting block limits the limiting block along a direction close to the shell withdrawing device.

In this scheme, this structure setting, compression spring will receive impact kinetic energy be transformed into spring potential energy after, compression spring can promote the locating part and move back the shell ware and reset towards the direction of pressure-releasing pipe, and the limiting part can carry on spacingly to the locating part, reduces the impact of moving back the shell ware to pressure-releasing pipe.

The utility model discloses an actively advance the effect and lie in: during testing, the bird bomb is arranged in the bomb support, the bird bomb and the bomb support slide in the channel under the pushing of compressed gas, and the pressure release hole can release high-pressure gas in the pressure release pipe before the bird bomb encounters the shell ejector to eject the shell, so that the interference of residual gas on the bird bomb is reduced; after the bird hits the experiment, dismantle stop nut, can remove compression spring, locating part and shell withdrawing ware along bird bullet flight direction from the guide bar to can take out dumped bullet support, dismantle simply, be convenient for take out bullet support.

Drawings

Fig. 1 is a schematic structural view of an air cannon according to a preferred embodiment of the present invention.

Description of the reference numerals

Air cannon 1

Gun barrel 11

Pressure relief tube 12

Pressure relief hole 121

Shell withdrawing device 13

Flange 131

Channel 14

Guide bar 21

Stopper 22

Sliding part 221

Position-limiting part 222

Compression spring 23

Limit nut 24

Gasket 25

Mounting flange 26

Stop block 27

Bullet holder 31

Detailed Description

The present invention is further illustrated by way of the following examples, which are not intended to limit the scope of the invention.

As shown in fig. 1, the embodiment discloses an air cannon, which includes a shell withdrawing device 13 and a cannon barrel 11, the air cannon 1 further includes a pressure release pipe 12, the pressure release pipe 12 is located between the shell withdrawing device 13 and the cannon barrel 11, a channel 14 for bird bullets to fly is formed in each of the pressure release pipe 12, the shell withdrawing device 13 and the cannon barrel 11, a pressure release hole 121 communicated with the channel 14 is further formed in the pressure release pipe 12, and an included angle between the pressure release hole 121 and the bird bullet flying direction is greater than 0 ° and less than 180 °. During the test, the bird bomb (not shown in the figure) is arranged in the bomb holder 31, the bird bomb and the bomb holder 31 slide in the channel 14 under the pushing of the compressed gas, and the pressure release hole 121 can release the high-pressure gas in the pressure release pipe 12 before the bird bomb encounters the shell ejector 13 to eject the shell, so that the interference of the residual gas on the bird bomb is reduced.

Specifically, as shown in fig. 1, the pressure release hole 121 is opened on the side of the pressure release tube 12. The pressure release hole 121 is conveniently formed in the side surface of the pressure release pipe 12, a certain distance is reserved between the pressure release hole 121 and other structures (such as the gun barrel 11, the shell withdrawing device 13 and the like), and high-pressure residual gas is laterally released on the side surface of the pressure release pipe 12 through the pressure release hole 121, so that interference of the high-pressure gas on other structures can be avoided. Of course, in other alternative embodiments, the pressure relief hole 121 may also be opened on the end face of the pressure relief tube 12.

As shown in fig. 1, the pressure relief hole 121 is disposed away from the ejector 13. The structure arrangement increases the flying distance of the bird bomb in the pressure release pipe 12 after passing through the pressure release hole 121, and the pressure release hole 121 can release high-pressure residual gas for a longer time, so that the interference of the high-pressure residual gas on the bird bomb is further reduced. Of course, in other alternative embodiments, the pressure relief hole 121 may be disposed proximate the extractor 13.

As shown in fig. 1, air cannon 1 further comprises: the number of the guide rods 21 is at least two, and the guide rods 21 are fixed on the pressure release pipe 12 and are arranged in parallel with the gun barrel 11; the limiting piece 22 is arranged on the guide rod 21 in a sliding mode, and the limiting piece 22 is used for limiting the shell withdrawing device 13 along the direction far away from the pressure releasing pipe 12; the compression spring 23 is sleeved on the guide rod 21, one end of the compression spring 23 is abutted against the limiting piece 22, and the compression spring 23 is used for providing acting force towards the direction of the gun barrel 11 for the limiting piece 22. Of course, in alternative embodiments, the guide rod 21 may be fixed to the barrel 11.

In this embodiment, in a free state, the compression spring 23 pushes the limiting piece 22 to one side of the pressure release pipe 12 and the gun barrel 11, during a bird bullet test, a bird bullet flying at a high speed and the bullet holder 31 collide with the shell extractor 13, the bullet holder 31 radially deforms along the shell extractor 13 and is sleeved on the shell extractor 13, the shell extractor 13 transmits impact kinetic energy to the compression spring 23 through the limiting piece 22 to be converted into spring potential energy, and the compression spring 23 absorbs redundant impact kinetic energy, so that impact on other structures is reduced; specifically, the shell extractor 13 includes a barrier core, which is in a step shape, and the elastic support 31 is radially deformed along the step shape of the barrier core and is sleeved on the barrier core.

As shown in fig. 1, the air cannon 1 further includes a detachable limit nut 24 mounted on the guide bar 21, the limit nut 24 abuts against the other end of the compression spring 23, and the limit nut 24 is used for limiting the compression spring 23. After the bird strike test, the waste bullet holder 31 can be taken out only by disassembling the limit nut 24 and moving the compression spring 23, the limit piece 22 and the shell withdrawing device 13 from the guide rod 21 along the flying direction of the bird bullet, so that the disassembly is simple and the bullet holder 31 can be conveniently taken out. Of course, in other alternative embodiments, the discarded sabot 31 may be removed by removing the guide bar 21.

As shown in fig. 1, the air cannon 1 further includes a spacer 25, and the spacer 25 is disposed between the limit nut 24 and the compression spring 23. This structure sets up, and the huge impact that bears between compression spring 23 and stop nut 24 can be alleviated to gasket 25, prolongs compression spring 23 and stop nut 24's life. Of course, in other alternative embodiments, the spacer 25 may not be provided.

As shown in fig. 1, the ejector 13 has a flange 131 facing the stopper 22, an end surface of the stopper 22 abuts against the flange 131, and a side surface of the stopper 22 abuts against a side surface of the ejector 13. The impact kinetic energy of the shell ejector 13 is transmitted to the limiting piece 22 through the flange 131, the side face of the limiting piece 22 is attached to the side face of the shell ejector 13, the shell ejector 13 is laterally limited by the limiting piece 22, the shell ejector 13 is clamped between the pressure release pipe 12 and the limiting piece 22, and when the shell ejector collides with the bird bullet and the bullet holder 31, the shell ejector is prevented from being deviated. In an alternative embodiment, the ejector 13 may not be provided with the flange 131, and the impact kinetic energy may be transmitted by clamping the ejector 13 on the stopper 22 at an end away from the pressure relief tube 12.

As shown in fig. 1, the stopper 22 includes: a sliding part 221, the sliding part 221 is sleeved on the guide rod 21; and a stopper 222, wherein the stopper 222 abuts against the flange 131, and the thickness of the stopper 222 in the sliding direction of the stopper 22 is greater than the thickness of the sliding part 221 in the sliding direction of the stopper 22. When the stopper 22 collides with the ejector 13 and impacts, the kinetic energy of the impact received by the stopper portion 222 with respect to the sliding portion 221 is larger, and the impact resistance of the stopper 22 can be improved by increasing the thickness of the stopper portion 222. In other embodiments, the sliding portion 221 and the limiting portion 222 may have the same thickness.

As shown in fig. 1, a guide rod 21 is fixed to an end of the pressure release tube 12 near the extractor 13. When an impact is applied, the limiting member 22 slides on the guide rod 21, and the limiting member 22 is closer to the position where the guide rod 21 is connected with the pressure release pipe 12 on the guide rod 21, so that the moment borne by the guide rod 21 is reduced, and the service life of the guide rod 21 is prolonged. Of course, in alternative embodiments, the guide rod 21 may be fixed to the end of the pressure release tube 12 adjacent the barrel 11.

As shown in fig. 1, the air cannon 1 further includes a fixing flange 26 and a limiting block 27, the guide rod 21 is fixed on the pressure release pipe 12 through the fixing flange 26, the limiting block 27 is disposed between the fixing flange 26 and the limiting block 22, and when the shell remover 13 is at the initial position, the limiting block 27 limits the limiting block 22 in a direction close to the shell remover 13. According to the structure, after the compression spring 23 converts the impact kinetic energy to the spring potential energy, the compression spring 23 can push the limiting piece 22 and the shell returning device 13 to reset towards the direction of the pressure release pipe 12, the limiting piece 27 can limit the limiting piece 22, and the impact of the shell returning device 13 on the pressure release pipe 12 is reduced. Of course, in other alternative embodiments, the stop block 27 may not be provided.

Specifically, in the present embodiment, the pressure release tube 12 is mounted on the barrel 11, and is connected by a spigot and a bolt; the pressure relief hole 121 is a waist hole, and the pressure relief hole can also be round, square, diamond and the like; the limiting member 22 is a movable flange, and the bearing supports the limiting member 22 and the guide rod 21.

During testing, a bird bullet is arranged in the bullet holder 31, the bird bullet and the bullet holder 31 slide in the gun barrel 11 and the pressure release pipe 12 quickly under the pushing of compressed gas, when encountering the shell ejector 13, the bullet holder 31 is blocked by the shell ejector 13 and collides against the limiting piece 22, the bird bullet continues flying, the limiting piece 22 slides on the guide rod 21 and impacts on the compression spring 23, and the compression spring 23 absorbs the residual impact energy.

Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. The air cannon comprises a shell withdrawing device and a cannon barrel, and is characterized by further comprising a pressure release pipe, wherein the pressure release pipe is located between the shell withdrawing device and the cannon barrel, a channel for bird bullets to fly is formed in each of the pressure release pipe, the shell withdrawing device and the cannon barrel, a pressure release hole communicated with the channel is further formed in the pressure release pipe, and an included angle between the pressure release hole and the bird bullet flying direction is larger than 0 degree and smaller than 180 degrees.

2. The air cannon of claim 1, wherein the relief hole opens on a side of the relief tube.

3. The air cannon of claim 2, wherein the relief vent is positioned remotely from the shell extractor.

4. The air cannon of claim 1, wherein the air cannon further comprises:

the limiting piece is slidably arranged on the guide rod and used for limiting the shell extractor along the direction far away from the pressure release pipe;

5. The air cannon of claim 4, further comprising a removable stop nut mounted on the guide rod, the stop nut abutting the other end of the compression spring, the stop nut being configured to stop the compression spring.

6. The air cannon of claim 5, further comprising a spacer disposed between the limit nut and the compression spring.

7. The air cannon of claim 4, wherein the extractor has a flange facing the retainer, wherein an end surface of the retainer abuts the flange, and wherein a side surface of the retainer abuts a side surface of the extractor.

8. The air cannon of claim 7, wherein the stop comprises:

the sliding part is sleeved on the guide rod;

the limiting part is abutted with the flange, and the thickness of the limiting part in the sliding direction of the limiting part is larger than that of the sliding part in the sliding direction of the limiting part.

9. The air cannon of claim 4, wherein the guide rod is secured to an end of the pressure relief tube proximate the extractor.

10. The air cannon of claim 9, further comprising a mounting flange through which the guide rod is secured to the pressure relief tube, and a stop disposed between the mounting flange and the stop, wherein the stop limits the stop in a direction toward the extractor when the extractor is in the initial position.