CN113124718A

CN113124718A - Supercavitation bullet

Info

Publication number: CN113124718A
Application number: CN202110429185.8A
Authority: CN
Inventors: 吕超; 郝博; 尹兴超; 王明阳; 代浩; 张力
Original assignee: Northeastern University China
Current assignee: Northeastern University China
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-07-16

Abstract

The invention discloses a supercavitation bullet, which relates to the technical field of bullets and comprises a support body and a cavitator, wherein the support body is sequentially provided with an embedding part, a rear groove part, an inclined part and a support body tail end from one side to the other side, the embedding part, the rear groove part, the inclined part and the support body tail end are integrally formed, the embedding part is embedded into the cavitator, one end of the cavitator, which is close to the support body, is provided with a groove matched with the embedding part, the rear groove part is columnar, the radius of the rear groove part is smaller than the radius of the end face of one end, which is close to the support body, of the cavitator, the tail end of the support body is columnar, the radius of the support body is larger. The arrangement of the invention provides a 5.8x42mm supercavitation bullet capable of keeping large power under water.

Description

Supercavitation bullet

Technical Field

The invention relates to the technical field of bullets, in particular to a supercavitation bullet.

Background

The bullet warhead is one of important parts in the ammunition of the gun, a conveying structure of a gun chamber is formed between the surface of the warhead and the inner surface of the gun, the bullet is convenient to launch, and the warhead is launched by the impact force generated by burning of gunpowder during launching. Because of the special underwater combat environment, while the common bullet is designed based on the use in the air, when shooting in water, because the density of water is about 800 times of the density of air, the viscosity and the resistance are far higher than the air, the bullet can completely release the kinetic energy of the bullet in a short flying distance, and the killing force is reduced sharply.

Therefore, the common bullets mainly used for individual combat cannot be shot in water, which becomes a main problem that soldiers perform special combat missions under water, under the attack of experts and scholars, supercavitation guns are researched to realize the underwater shooting of bullets, only a few countries have experimental designs on the supercavitation type underwater bullets, only Norwegian externally declares that 7.62x51mm underwater supercavitation ammunition is developed, and the 5.8x42mm powerful supercavitation gun bullet technology has not been developed at all.

For this purpose we propose a 5.8x42mm supercavitation bullet capable of maintaining great power under water.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a supercavitation bullet.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a super vacuole bullet, includes support body and cavitator, support body has set gradually embedding portion, back slot part, rake and support body end by a lateral opposite side, embedding portion, back slot part, rake and support body end integrated into one piece, the embedding portion embedding inside the cavitator, the cavitator closes on the one end of support body and sets up the recess with embedding looks adaptation, back slot part is the column, and its radius is less than the cavitator closes on the radius of support body one end terminal surface, support body end is the column, and its radius is greater than back slot part radius, it is provided with the rake transition to hold up between end and the back groove.

Furthermore, one end of the cavitator, which is far away from the support body, is a first plane, one end of the cavitator, which is close to the support body, is a second plane, the radius of the first plane is smaller than that of the second plane, and a curved surface transition is arranged between the first plane and the second plane.

Furthermore, the end face of the embedded part, which is far away from the rear groove part, is abutted against the inner wall of the groove.

Further, the embedding part lateral wall with recess inner wall looks adaptation, the recess inner wall has seted up the cooperation screw thread, the cooperation spiral shell approaches on recess opening part and back slot part cooperation.

Further, the mating threads have an outer diameter that is less than an outer diameter of the rear groove portion.

Compared with the prior art, the invention has the beneficial effects that:

the super-cavity bullet provided by the invention has an effective underwater range of 10m (two layers of target plates with the thickness of 50mm are stacked at a 10-meter position in a breakdown mode); on land the effective range > 400m (400 m penetration 25mm thick target plate); the generation rate of the underwater supercavitation > is 95 percent; the cross-medium supercavity generation rate > is 80%; and can be suitable for 95-1 type 5.8mm automatic rifle to launch on land;

through the cavitation device and the support body, the cavitation device is mainly responsible for generating supercavitation, and the support body mainly plays a role in keeping the integral stability of the bullet in water through the empennage and the position of the mass center of the support body; the cavitation device of the supercavity arranged at the head of the bullet enables the generation rate of the underwater supercavity to be as high as ninety-five percent and the generation rate of the cross-medium supercavity to be as high as eighty percent, thereby increasing the shooting range of the supercavity bullet in water and cross-medium shooting; the stability of the bullet in water and across media is ensured by a rear groove arranged at the tail of the bullet and an inclined part of a tail wing (the inclined part and the tail end of the support body); the round plane arranged at the front end of the cavitator plays a role of flushing water flow to form supercavitation (the low-pressure area generated by high-speed motion generated by the front end of the bullet is utilized to enable the boiling point of water to be lower than that under atmospheric pressure, a water vapor protective film is formed on the surface of the bullet, and the bullet moves in the water under the protection of water vapor), and then the gun bullet arc at the front end of the cavitator plays a role of reducing resistance.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

Fig. 1 is a schematic view of the overall structure of a supercavitation cartridge according to the present invention.

In the figure: 1. a cavitator; 11. a first plane; 12. curved surface transition; 121. a sloping transition; 122. performing arc transition; 13. matching threads; 14. a second plane;

2. a support body; 21. an insertion section; 22. a rear groove part; 23. an inclined portion; 24. the tail end of the support body.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1, a supercavitation bullet comprises a support body 2 and a cavitator 1,

the cavitation device 1 is integrally in a cone structure, two end faces of a cone body of the cavitation device 1 are planes, one end of the cavitation device 1, which is far away from the support body 2, is a first plane 11, one end of the cavitation device 1, which is close to the support body 2, is a second plane 14, the radius of the first plane 11 is smaller than that of the second plane 14, and a curved surface transition 12 is arranged between the first plane 11 and the second plane 14 to form a smooth structure of the outer wall of the cavitation device 1 so as to reduce the resistance of a bullet in the process of advancing in water; the second plane 14 is provided with a groove for mounting the support body 2, the inner wall of the groove is also provided with a matching thread 13, and the matching thread 13 is close to the opening of the groove;

in other embodiments, the curved transition 12 includes a sloped transition 121 and an arcuate transition 122, wherein the slope angle θ of the sloped transition ranges from 5 ° to 10 °; the area of the first plane 11 (round surface) is 1.8-2.2mm²

The support body 2 is of a multi-stage structure and sequentially comprises an embedded part 21, a rear groove part 22, an inclined part 23 and a support body tail end 24, wherein the embedded part 21, the rear groove part 22, the inclined part 23 and the support body tail end 24 are integrally formed,

embedding portion 21 embedding cavitator 1 is inside, embedding portion 21 front portion is the round platform structure, the rear portion is the cylinder structure, wherein the lateral wall of round platform and the inner wall surface laminating of last bottom surface and recess mutually, the local inner wall surface laminating with the recess of cylinder structure lateral wall (because of the cooperation screw thread 13 that sets up, make the cylinder structure can not laminate with the recess inner wall mutually completely), back slot part 22 is the column, its radius is less than the radius of 1 second plane 14 of cavitator, be greater than the radius of embedding portion 21 cylinder structure, wherein back slot part 22 tip and cooperation screw thread 13 cooperate.

The tail end 24 of the support body is of a cylindrical structure, the radius of the tail end 24 of the support body is larger than that of the rear groove part 22, an inclined part 23 is arranged between the support end and the rear groove for transition, the inclined part 23 is of a circular platform structure, the inclined part 23 and the tail end 24 of the support body jointly form a tail wing, when the direction of the bullet changes, surrounding media can act on the tail wing, and the tail wing can provide a force for correcting the direction of the bullet, so that the bullet cannot deviate from a flight line in the air and water;

in other embodiments, the angle of inclination α of the inclined portion 23 ranges from 2 ° to 5 °.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a super vacuole bullet, includes support body and cavitator, its characterized in that, support body has set gradually embedding portion, back slot part, rake and support body end by a lateral opposite side, embedding portion, back slot part, rake and support body end integrated into one piece, the embedding portion embedding inside the cavitator, the cavitator closes on the one end of support body and sets up the recess with embedding looks adaptation, back slot part is the column, and its radius is less than the cavitator closes on the radius of support body one end terminal surface, support body end is the column, and its radius is greater than back slot part radius, it is provided with the rake transition to hold up between end and the back groove.

2. The supercavitation bullet as recited in claim 1 wherein an end of said cavitator remote from said cradle is a first plane, an end of said cavitator adjacent to said cradle is a second plane, said first plane has a smaller radius than said second plane, and said first plane has a curved transition to said second plane.

3. The shot shell as recited in claim 1 wherein the end surface of the insert portion distal from the rear slot portion abuts the inner wall of the recess.

4. The supercavitation bullet as recited in claim 1 wherein said side walls of said insertion portion are adapted to said inner wall of said recess, said inner wall of said recess being formed with mating threads, said mating threads being engaged with said rear slot portion adjacent said opening of said recess.

5. A supercavitation bullet as claimed in claim 4 in which the external diameter of said mating thread is less than the external diameter of said rear slot portion.