CN112432563A

CN112432563A - Piston type multi-shot series connection launching structure

Info

Publication number: CN112432563A
Application number: CN202011191329.2A
Authority: CN
Inventors: 黄曦; 王冠男; 程诚; 张小兵
Original assignee: Nanjing University of Science and Technology
Current assignee: Nanjing University of Science and Technology
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-03-02
Anticipated expiration: 2040-10-30
Also published as: CN112432563B

Abstract

The invention discloses a piston type multi-bullet series connection launching structure, which comprises a barrel, a medicine chamber and a self-contained bullet body, wherein the self-contained bullet body comprises a bullet shell, an air chamber, a piston, a bullet belt, a bullet and a bullet clip, and a plurality of vent holes are distributed on the bottom cover of the bullet shell; the bullet is connected with the bullet shell through a bullet clip; the two elastic bands are fixed on the outer side wall of the bullet shell at intervals and matched with the inner wall surface of the barrel; the cartridge case is divided into a front cavity and a rear cavity, a through hole is formed in the center of the partition plate, the piston penetrates through the through hole, and the piston moves along the through hole. High-temperature and high-pressure gas generated by ignition enters the gas chamber through the vent hole, and after a certain period of time, the high-temperature and high-pressure gas enters the front cavity of the cartridge case through the gas guide hole on the piston, so that the pressure of the front cavity of the cartridge case is increased. After the integrally-loaded projectile body breaks away from the muzzle and enters water, the pressure difference between the inside and the outside of the integrally-loaded projectile body enables the notch to be broken, the integrally-loaded projectile body is disassembled, then the projectile moves in the water in a series connection mode, and supercavity wrapping the projectile body is formed around the projectile body, so that the resistance reduction of the projectile body is realized, and the resistance of the rear projectile body can be greatly reduced.

Description

Piston type multi-shot series connection launching structure

Technical Field

The invention belongs to the technical field of underwater launching, and particularly relates to a piston type multi-bullet series launching structure.

Background

The supercavity weapon is a new concept underwater weapon, and under the supercavity flow mode, the pressure around the underwater projectile is reduced to a certain critical value, so that the water is vaporized into supercavity surrounding the whole navigation body under low pressure. Based on the supercavitation drag reduction technology, the underwater high-speed projectile can be applied to the military fields of artillery weapon ammunition technology and the like, is used for intercepting torpedoes, destroying the torpedoes, destroying underwater targets and the like, and has wide application prospect.

Patent CN110671969A discloses a shelling card flap for reducing fluid resistance, which can reduce the resistance borne by the card flap when the card flap is taken out of a chamber to a certain extent and improve the underwater launching speed. However, the patent does not provide extensive research into the combined drag reducing effects of supercavitation projectiles.

Disclosure of Invention

The invention aims to provide a multi-projectile tandem type launching structure for launching and reducing drag of an underwater projectile, which can realize multi-projectile tandem launching of the projectile and effectively reduce the resistance of the projectile in water, thereby improving the performance of the underwater projectile.

The technical solution for realizing the purpose of the invention is as follows: a piston type multi-pill series-connection launching structure comprises a barrel, a medicine chamber and an integrally-loaded bullet body, wherein the integrally-loaded bullet body and the medicine chamber are both positioned in the barrel, and the medicine chamber is positioned behind the integrally-loaded bullet body; the self-contained projectile body comprises a projectile shell, an air chamber, a piston, two projectile belts, M projectiles and N cartridges, wherein M is more than or equal to 2, and N = M; the cartridge case is a thin-wall cylinder, the top surface is an open end, the bottom surface is provided with a bottom cover, and a plurality of vent holes are annularly distributed on the bottom cover; m pills are sequentially filled in the shell from back to front, and the pills are connected with the shell through a cartridge clip; the two elastic bands are fixed on the outer side wall of the bullet shell at intervals and matched with the inner wall surface of the barrel; the cartridge clip is used for fixing and positioning the projectile; a clapboard is arranged in the bullet shell and divides the bullet shell into a front cavity and a rear cavity, the clapboard is positioned behind the bullet, and the rear cavity is an air chamber; the center of the partition board is provided with a through hole, the piston passes through the through hole, one end of the piston is positioned in the air chamber, the other end of the piston is positioned in the front cavity of the cartridge case, and the piston moves back and forth along the through hole.

Compared with the prior art, the invention has the remarkable advantages that:

(1) the back end face of the piston is provided with an air guide hole, and after the propellant powder is ignited, high-temperature and high-pressure gas passes through the air guide hole and enters the front cavity of the cartridge case. The air input of the front cavity of the cartridge case can be controlled through the air guide hole on the piston, and the slow rise of the pressure in the front cavity of the cartridge case is realized.

(2) M pills are sequentially filled in the shell from back to front, so that the serial firing of weapons can be realized, and a combined form is formed to strike a target underwater. The projectiles move underwater in series, so that the resistance of the rear projectile body can be effectively reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Figure 2 is a schematic view of the self-contained projectile of the present invention as it exits the muzzle and enters the water.

Fig. 3 is a schematic view of the motion of the tandem projectile under water.

Fig. 4 is a schematic view of a structure of three pellets.

Detailed Description

The embodiments of the present invention will now be described with reference to the accompanying drawings. The dimensions of the various features in the drawings are not necessarily to scale, and any description is to be considered exemplary rather than limiting.

With reference to fig. 1 to 4, the piston type multi-bullet series-connection launching structure comprises a barrel 1, a medicine chamber 7 and a self-contained bullet body, wherein the self-contained bullet body and the medicine chamber 7 are both positioned in the barrel 1, and the medicine chamber 7 is positioned behind the self-contained bullet body; the self-contained projectile body comprises a projectile shell 2, an air chamber 8, a piston 9, two projectile belts 4, M projectiles 3 and N projectile clamps 5, wherein M is more than or equal to 2, and N = M; the cartridge case 2 is a thin-wall cylinder, the top surface is an open end, the bottom surface is provided with a bottom cover, and a plurality of vent holes 6 are annularly distributed on the bottom cover; m pills 3 are sequentially filled in the shell 2 from back to front, and the pills 3 are connected with the shell 2 through the clips 5; the two elastic belts 4 are fixed on the outer side wall of the bullet shell 2 at intervals and matched with the inner wall surface of the barrel 1; the cartridge clip 5 is used for fixing and positioning the projectile 3; a clapboard is arranged in the bullet shell 2 to divide the bullet shell 2 into a front cavity and a rear cavity, the clapboard is positioned behind the bullet 3, and the rear cavity is an air chamber 8; the center of the clapboard is provided with a through hole, a piston 9 passes through the through hole, one end of the piston is positioned in the air chamber 8, the other end of the piston is positioned in the front cavity of the cartridge case 2, and the piston 9 moves back and forth along the through hole. According to the piston type multi-bullet series-connection launching structure provided by the invention, ignition powder is combusted to generate high-temperature and high-pressure gas to push a whole-loaded bullet to move forwards in the barrel 1, and the whole-loaded bullet is radially restricted when moving in the barrel 1. High-temperature and high-pressure fuel gas enters the air chamber 7 through the vent hole 6 at the tail part of the integrally-loaded projectile body, so that the pressure in the air chamber 7 is increased, the piston 9 is pushed, and the piston 9 is changed into an unbuckled state from a buckled state. Along with the continuous rising of air chamber 7 pressure, piston 9 continues to be promoted, and piston 9 changes from the unbuckled state to the fastening state, and high temperature high pressure gas gets into the shell 2 front chamber through the air guide hole on piston 9, the slow rising of shell 2 front chamber pressure. When the integrally-loaded projectile body flies away from the muzzle and enters water, the pressure difference between the inside and the outside of the integrally-loaded projectile body causes the connecting notch of the multi-petal projectile body to be broken, and thus the integrally-loaded projectile body is disintegrated. Then, the projectile 3 is separated from the shell 2, the projectile 3 moves in the water at a certain interval, and supercavity is formed around the projectiles in series, so that the resistance of the projectiles is effectively reduced, and the resistance of the rear projectiles is greatly reduced. The invention can be applied to drag reduction of the underwater serial navigation body.

The last point is explained: the above-described embodiments are merely one of the technical solutions, not all examples, which are provided to help understanding the description of the embodiments, but are not meant to limit the present invention.

Claims

1. The utility model provides a piston many shots series connection launch structure, includes barrel (1), medicine room (7) and whole dress projectile body, its characterized in that: the whole-loaded projectile body and the medicine chamber (7) are both positioned in the barrel (1), and the medicine chamber (7) is positioned behind the whole-loaded projectile body; the self-contained projectile body comprises a projectile shell (2), an air chamber (8), a piston (9), two projectile belts (4), M projectiles (3) and N projectile clamps (5), wherein M is more than or equal to 2, and N = M; the cartridge case (2) is a thin-wall cylinder, the top surface is an open end, the bottom surface is provided with a bottom cover, and a plurality of vent holes (6) are annularly distributed on the bottom cover; m pills (3) are sequentially filled in the shell (2) from back to front, and the pills (3) are connected with the shell (2) through a clip (5); the two elastic belts (4) are fixed on the outer side wall of the bullet shell (2) at intervals and matched with the inner wall surface of the barrel (1); the cartridge clip (5) is used for fixing and positioning the projectile (3); a clapboard is arranged in the bullet shell (2) to divide the bullet shell (2) into a front cavity and a rear cavity, the clapboard is positioned behind the bullet (3), and the rear cavity is an air chamber (8); a through hole is formed in the center of the partition plate, a piston (9) penetrates through the through hole, one end of the piston is located in the air chamber (8), the other end of the piston is located in the front cavity of the cartridge case (2), and the piston (9) moves back and forth along the through hole.

2. The piston-type multiple-projectile tandem launching structure of claim 1, wherein: the air chamber (8) is located the afterbody of the body of the complete loading, and the air chamber (8) is connected through the air vent (6) with the powder chamber (7) for the high temperature high pressure gas that the powder chamber (7) ignition produced gets into air chamber (8).

3. The piston-type multiple-projectile tandem launching structure of claim 1, wherein: the diameters of the front end face and the rear end face of the piston (9) are larger than the diameter of the through hole.

4. The piston-type multiple-projectile tandem launching structure according to claim 1 or 3, wherein: the rear end face of the piston (9) is provided with an air guide hole, and after the propellant powder is ignited, high-temperature and high-pressure gas passes through the air guide hole and enters the front cavity of the cartridge case (2).

5. The piston-type multiple-projectile tandem launching structure of claim 1, wherein: the cartridge case (2) is divided into a plurality of petals, grooving treatment is carried out on the joint of the two adjacent petals, after the integrally-loaded projectile body enters water, the grooving part is broken by the pressure difference between the inside and the outside of the integrally-loaded projectile body, and the integrally-loaded projectile body is disassembled.