Anti-vibration impact device for asymmetrically-distributed bending, contracting and expanding flow channel chamber opening

Abstract

The invention discloses an anti-vibration impact device for an asymmetrically distributed bending contraction expansion flow channel bore opening. An upper drainage flow channel, a lower drainage flow channel, a shot hole and a barrel mounting hole are formed in a body of the anti-vibration impact device; the barrel mounting hole is used for mounting the bore opening device at a barrel opening; the upper row of flow channels and the lower row of flow channels are communicated with the shot holes and are flow channels with gradually changed sections and bent central axes. Compared with an existing muzzle device, by means of the asymmetrical distribution design of the upper row of flow channels and the lower row of flow channels which are inclined to the axis of the barrel and are different in position but equal in inclination angle, more high-pressure gunpowder gas can be smoothly guided in to be ejected out of the inclined rear portions of the upper row of flow channels and the lower row of flow channels in an accelerated mode, and therefore larger reverse thrust aerodynamic force is generated; and meanwhile, transient resultant force and transverse power coupling effect are generated on the barrel in the forward direction of the barrel in the shooting process, so that the purposes of restraining vibration of a weapon bore opening and reducing impact on a carrying platform are achieved.

Description

Technical Field

[0001] The invention relates to the structural field of firearms or artillery, and in particular to an asymmetrically distributed bending, contraction and expansion flow channel muzzle device. Background Art

[0002] When firing existing barreled weapons, high-temperature, high-pressure gunpowder gas is rapidly ejected from the muzzle, which generates a strong impact load on the weapon barrel, causing the barrel to vibrate violently, seriously affecting the shooting direction of the projectile when it leaves the muzzle, greatly reducing the shooting accuracy, and may cause impact on the weapon carrying platform, affecting the platform safety. Therefore, suppressing barrel vibration and reducing the impact of the weapon on the carrying platform are of great significance to improving the combat effectiveness of barreled weapons.

[0003] The most common way to use the energy of high-pressure gas in the chamber to reduce the barrel load is the muzzle brake, but the current muzzle brake usually sprays vertically from the side or directly to the side and rear of the weapon. The vertical spray method does not produce recoil impulse, and the recoil reduction efficiency is low; although spraying directly to the side and rear of the weapon can produce recoil impulse, it does not use the high-speed forward-moving gunpowder gas to export, and the exported gunpowder gas is not further accelerated, and the internal energy of the high-pressure gunpowder gas is not fully exploited.

[0004] At present, the mainstream vibration control technologies for barreled weapons mainly include: fuzzy PID active vibration control technology, magnetorheological fluid active vibration control technology, and intelligent material barrel vibration control technology. However, these mainstream vibration control technologies have some inevitable defects, such as: fuzzy PID active vibration control technology, its main control system is complex, and it is difficult to achieve wide application on other guns; magnetorheological fluid active vibration control technology, its main installation is very inconvenient, the response speed is not enough, and the vibration suppression effect is not good; intelligent material barrel vibration control technology, its main vibration reduction effect is very limited. The above vibration control technologies each have their own advantages and disadvantages, but their respective disadvantages are obvious, so it is difficult to be widely promoted and applied. Summary of the invention

[0005] The purpose of the present invention is to provide an asymmetrically distributed curved, contracted and expanded flow channel muzzle anti-vibration impact device, which utilizes the reverse thrust aerodynamic force generated by the accelerated ejection of high-pressure gunpowder gas from the upper and lower flow channels obliquely rearward when the projectile is fired, as well as the transient resultant force and lateral dynamic couple effect on the barrel in the forward direction of the barrel during the shooting process, so as to significantly reduce the recoil of the aircraft gun and reduce the vibration of the barrel. At the same time, the device has a simple structure and can be widely used.

[0006] The technical solution for achieving the purpose of the present invention is: an asymmetrically distributed curved contraction and expansion flow channel muzzle device, characterized in that: an upper flow channel, a lower flow channel, a projectile hole and a barrel mounting hole are arranged on its main body; the barrel mounting hole is used to install the muzzle device at the barrel mouth; the upper flow channel and the lower flow channel are both connected to the projectile hole, the upper flow channel includes a plurality of evenly distributed upper curved flow channels, the lower flow channel includes a plurality of evenly distributed lower curved flow channels, and the upper curved flow channel and the lower curved flow channel are arranged asymmetrically.

[0007] Furthermore, each upper curved flow channel includes: an upper contraction channel, an upper curved channel and an upper expansion channel connected in sequence; with the projectile movement direction as the front, the upper contraction channel is inclined forward and connected to the projectile hole; the upper expansion channel is inclined backward.

[0008] Furthermore, each lower curved flow channel includes: a lower contraction channel, a lower curved channel and a lower expansion channel connected in sequence; the lower contraction channel is inclined forward and is connected to the projectile hole.

[0009] Furthermore, along the airflow discharge direction, the cross-sectional area of ​​the upper contraction channel gradually decreases, and the cross-sectional area of ​​the upper expansion channel gradually increases; the cross-sectional area of ​​the lower contraction channel gradually decreases, and the cross-sectional area of ​​the lower expansion channel gradually increases.

[0010] Furthermore, the contraction channel has a forward inclination angle equal to that of the upper contraction channel, and the lower expansion channel has a rearward inclination angle equal to that of the upper expansion channel.

[0011] Furthermore, in the upper row of flow channels, there are provided an upper row last curved flow channel located at the rear and an upper row front curved flow channel located at the front; in the lower row of flow channels, there are provided a lower row last curved flow channel located at the rear and a lower row front curved flow channel located at the front, the upper row last curved flow channel is located in front of the lower row last curved flow channel, and the upper row front curved flow channel is located in front of the lower row front curved flow channel.

[0012] Furthermore, the projectile hole and the barrel mounting hole are coaxial, and the weapon barrel is inserted into the barrel mounting hole.

[0013] Furthermore, the number of the upper curved flow channels and the number of the lower curved flow channels are both 2 or more.

[0014] Compared with the prior art, the present invention has the following significant advantages:

[0015] 1. By designing the upper and lower flow channels, which are inclined to the axis of the barrel and have different positions but equal inclination angles, the asymmetric distribution of the upper and lower flow channels makes the components of the thrust aerodynamic force of the upper and lower flow channels along the lateral direction of the barrel substantially equal, but opposite in direction and at different points of action. Therefore, an approximate moment of force can be generated to control the vibration of the barrel without generating lateral force on the barrel, thereby effectively reducing the vibration of the barrel and generating no impact on the carrying platform.

[0016] 2. The present invention can smoothly introduce more high-pressure gunpowder gas into the flow channel through the flow channel design of a contraction channel inclined at the front and gradually decreasing, a curved channel and an expansion channel inclined at the rear and gradually increasing cross-sectional area, and further accelerate the gunpowder gas through the expansion channel, converting the internal energy of the gunpowder gas into kinetic energy as much as possible, thereby increasing the momentum of the gunpowder gas when it is ejected obliquely to the rear, thereby achieving the purpose of effectively reducing the impact load of the barrel.

[0017] 3. The side of the present invention is provided with linearly arranged through holes, combined with an asymmetric design, which greatly improves the material utilization rate, has a light structure, is widely used, and is easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the asymmetrically distributed bending, contraction and expansion flow channel mouth anti-vibration impact device of the present invention.

[0019] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the asymmetrically distributed bending, contraction and expansion flow channel muzzle anti-vibration impact device of the present invention when it is installed on a barrel weapon.

[0020] Figure 3 It is a detailed structural schematic diagram of the asymmetrically distributed bending, contraction and expansion flow channel mouth anti-vibration impact device of the present invention.

[0021] Figure 4 It is a three-dimensional cross-sectional structural schematic diagram of the asymmetrically distributed bending, contraction and expansion flow channel mouth anti-vibration impact device of the present invention.

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the asymmetrically distributed bending, contraction and expansion flow channel mouth anti-vibration impact device of the present invention. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way.

[0024] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5The asymmetrically distributed curved, contracted and expanded flow channel muzzle anti-vibration impact device designed by the present invention is installed and fixed on the barrel of a barrel weapon. The muzzle anti-vibration impact device is provided with an upper flow channel 1, a lower flow channel, a projectile hole 3 and a barrel mounting hole 4 on its body;

[0025] The upper flow channel 1 includes a plurality of upper curved flow channels that are evenly distributed, and the lower flow channel 2 includes a plurality of lower curved flow channels that are evenly distributed; the moving direction of the projectile is the front. The upper flow channel 1 is provided with an upper row last curved flow channel 101 located at the rear and an upper row front curved flow channel 102 located at the front; the lower flow channel 2 is provided with a lower row last curved flow channel 201 located at the rear and a lower row front curved flow channel 202 located at the front, the upper row last curved flow channel 101 is located in front of the lower row last curved flow channel 201, and the upper row front curved flow channel 102 is located in front of the lower row front curved flow channel 202; since the components of the thrust aerodynamic forces of the upper flow channel 1 and the lower flow channel 2 along the lateral direction of the barrel are basically equal in magnitude, but opposite in direction and at different points of action, the thrust aerodynamic forces of the upper flow channel 1 and the lower flow channel 2 generate a transient resultant force and a lateral dynamic couple on the barrel along the forward direction of the barrel during shooting, thereby achieving the purpose of suppressing the vibration of the weapon muzzle while reducing the impact on the carrying platform.

[0026] Each of the upper curved flow channels includes: an upper contraction channel 103 with a gradually decreasing cross-sectional area, an upper curved channel 104, and an upper expansion channel 105 with a gradually increasing cross-sectional area, which are connected in sequence; the upper contraction channel 103 is inclined forward (i.e., the angle between the axis of the upper contraction channel 103 and the direction of movement of the projectile is less than 90 degrees) and is connected to the projectile hole 3; the upper expansion channel 105 is inclined backward (i.e., the angle between the axis of the upper expansion channel 105 and the direction of movement of the projectile is greater than 90 degrees).

[0027] Each lower curved flow channel includes: a lower contraction channel 203 with a gradually decreasing cross-sectional area (i.e., along the air flow discharge direction), a lower curved channel 204, and a lower expansion channel 205 with a gradually increasing cross-sectional area, which are connected in sequence; the lower contraction channel 203 is inclined forward (i.e., the angle between the axis of the lower contraction channel 203 and the direction of movement of the projectile is less than 90 degrees) and is connected to the projectile hole 3, the contraction channel 203 is inclined forward at an angle equal to the forward inclination angle of the upper contraction channel 103, the lower expansion channel 205 is inclined backward (i.e., the angle between the axis of the lower expansion channel 205 and the direction of movement of the projectile is greater than 90 degrees), and the lower expansion channel 205 is inclined backward at an angle equal to the backward inclination angle of the upper expansion channel 105.

[0028] Compared with a straight tube flow channel, according to the characteristics of the Laval nozzle, the flow velocity of the high-pressure gas will increase to a critical value and no longer increase when passing through a contraction channel with a gradually decreasing cross-sectional area. When passing through an expansion channel with a gradually increasing cross-sectional area, the flow velocity will be further increased, thereby generating a greater reverse thrust aerodynamic force.

[0029] The number of the upper curved flow channels and the number of the lower curved flow channels are both 2 or more;

[0030] The projectile hole 3 and the barrel mounting hole 4 are coaxial, and the weapon barrel 5 is inserted into the barrel mounting hole 4 .

[0031] When the weapon is fired, the projectile moves toward the muzzle under the impetus of the high-pressure gas generated by the combustion of gunpowder. When the projectile moves through the upper flow channel 1 and the lower flow channel 2, the asymmetric distribution design of the upper flow channel 1 and the lower flow channel 2, which are inclined to the axis of the barrel and have different positions but equal inclination angles, can smoothly introduce more high-pressure gunpowder gas to be accelerated and ejected from the oblique rear of the upper flow channel 1 and the lower flow channel 2, thereby generating a larger reverse thrust aerodynamic force; at the same time, since the reverse thrust aerodynamic forces of the upper flow channel 1 and the lower flow channel 2 along the lateral direction of the barrel are basically equal in magnitude, but opposite in direction and at different points of action, the reverse thrust aerodynamic forces of the upper flow channel 1 and the lower flow channel 2 generate a transient resultant force and a lateral dynamic couple on the barrel in the forward direction of the barrel during shooting, thereby achieving the purpose of suppressing the vibration of the weapon muzzle while reducing the impact on the carrying platform, and can be widely used in various types of automatic weapons and artillery.

Claims

1. An asymmetrically distributed bending, contraction and expansion flow channel mouth device, characterized in that: An upper flow channel (1), a lower flow channel (2), a projectile hole (3) and a barrel mounting hole (4) are arranged on the main body; the barrel mounting hole (4) is used to mount the muzzle device on the barrel mouth; the upper flow channel (1) and the lower flow channel (2) are both connected to the projectile hole (3); the upper flow channel (1) includes a plurality of evenly distributed upper curved flow channels; the lower flow channel (2) includes a plurality of evenly distributed lower curved flow channels; the upper curved flow channels and the lower curved flow channels are arranged asymmetrically.

2. The asymmetrically distributed bending, contraction and expansion flow channel mouth device according to claim 1, characterized in that: Each upper curved flow channel comprises: an upper contraction channel (103), an upper curved channel (104) and an upper expansion channel (105) which are connected in sequence; with the projectile moving direction as the front, the upper contraction channel (103) is inclined forward and is connected to the projectile hole (3); and the upper expansion channel (105) is inclined backward.

3. The asymmetrically distributed bending, contraction and expansion flow channel mouth device according to claim 2, characterized in that: Each lower curved flow channel comprises: a lower contraction channel (203), a lower curved channel (204) and a lower expansion channel (205) which are connected in sequence; the lower contraction channel (203) is inclined forward and is connected to the shot hole (3).

4. The asymmetrically distributed bending, contraction and expansion flow channel mouth device according to claim 3, characterized in that: Along the airflow discharge direction, the cross-sectional area of ​​the upper contraction channel (103) gradually decreases, while the cross-sectional area of ​​the upper expansion channel (105) gradually increases; the cross-sectional area of ​​the lower contraction channel (203) gradually decreases, while the cross-sectional area of ​​the lower expansion channel (205) gradually increases.

5. The asymmetrically distributed bending, contraction and expansion flow channel mouth device according to claim 3, characterized in that: The contraction channel (203) is inclined forward at an angle equal to that of the upper contraction channel (103), and the lower expansion channel (205) is inclined backward at an angle equal to that of the upper expansion channel (105).

6. The asymmetrically distributed bending, contraction and expansion flow channel mouth device according to claim 3, characterized in that: The upper row of flow channels (1) is provided with an upper row last curved flow channel (101) located at the rear and an upper row first curved flow channel (102) located at the front; the lower row of flow channels (2) is provided with a lower row last curved flow channel (201) located at the rear and a lower row first curved flow channel (202) located at the front, the upper row last curved flow channel (101) being located in front of the lower row last curved flow channel (201), and the upper row first curved flow channel (102) being located in front of the lower row first curved flow channel (202).

7. The asymmetrically distributed bending, contraction and expansion flow channel mouth device according to claim 1, characterized in that: The projectile hole (3) and the barrel mounting hole (4) are coaxial, and the weapon barrel is inserted into the barrel mounting hole (4).

8. The asymmetrically distributed bending, contraction and expansion flow channel mouth device according to claim 1, characterized in that: The number of the upper curved flow channels and the number of the lower curved flow channels are both 2 or more.

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