CN115979075A - Projectile body structure with air-tight bottom push - Google Patents
Projectile body structure with air-tight bottom push Download PDFInfo
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- CN115979075A CN115979075A CN202210377535.5A CN202210377535A CN115979075A CN 115979075 A CN115979075 A CN 115979075A CN 202210377535 A CN202210377535 A CN 202210377535A CN 115979075 A CN115979075 A CN 115979075A
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Abstract
The invention discloses a projectile body structure with an air-closed bottom push function, which comprises a projectile body and an air-closed bottom push function, wherein the air-closed bottom push function is made of MC nylon and comprises a projectile body connecting part and an air-closed part which are integrally formed, the projectile body connecting part is in threaded connection with the tail part of the projectile body, the outer diameter of the projectile body connecting part is equal to that of the projectile body, the air-closed part is of a conical structure with the bottom expanding outwards, and the diameter range of the outward expansion of the air-closed part is 1.5% -3% of the diameter of the projectile body connecting part. The invention solves the problem of air leakage in the process of launching the caliber projectile body such as a penetration test and the like, can avoid scratching the bore, improves the projectile body launching kinetic energy, has good landing posture and increases the penetration capability of the projectile body to a target.
Description
The technical field is as follows:
the invention relates to a projectile body structure with an air-closing bottom push function.
Background art:
in the fields of weapon destruction effect research and protection engineering design, the gun or air cannon launching projectile body is widely applied to carrying out penetration tests on targets. With the consolidation and deep underground of important military targets, the development of penetration technology and ground-drilling weapons is greatly promoted, and the requirement on the projectile launching speed is higher and higher. In order to strike deep-layer work objects, the projectile body needs larger striking kinetic energy, which puts higher requirements on the launching speed.
At present, a sub-caliber launching technology is mainly adopted, and the projectile body launching speed is improved through projectile body support separation, so that the method is applicable to the type of test that the diameter of the projectile body is smaller than the caliber of a gun. But when the projectile diameter is comparable to the gun caliber, the sub-caliber launch will no longer be applicable. When the gun or air cannon has a certain launching capacity, the projectile body structure can be designed, the utilization rate of a power source (gunpowder thrust or gas thrust) is increased by designing tail bottom pushing, and then the launching speed is increased. On one hand, the bottom push can play a role in front-back centering to enable the projectile body to horizontally move in the gun barrel, and the flying posture after the projectile body is taken out of the bore is ensured; meanwhile, the bottom pusher is closely matched with the inner wall of the bore, so that the bore is ensured to be airtight and not scratched, and the utilization rate of a power source is maximized. Therefore, the projectile body gas-closing bottom pushing device is simple in structure, efficient and convenient to design, and has practical significance for researching penetration resistance of materials and structures under the requirements of equal caliber and high-speed launching.
The invention content is as follows:
the invention provides a projectile body structure with air-tight bottom pushing, which solves the difficult problems that constant-caliber projectile bodies move stably in a gun bore and are air-tight, effectively ensures that the projectile bodies can penetrate a target vertically at a higher speed after leaving a gun mouth, and has the characteristics of simple structure and easiness in processing.
The technical scheme adopted by the invention is as follows:
the utility model provides a bullet body structure that pushes away at end of area closed gas, pushes away at the end including the bullet body and closed gas, the end of pushing away that closes gas adopts the MC nylon to make, including integrated into one piece's bullet body connecting portion and the portion of closing gas, bullet body connecting portion threaded connection is at the afterbody of bullet body, and the external diameter of bullet body connecting portion equals with the bullet body external diameter of bullet body, and the portion of closing gas is the outside expansion toper structure in bottom, and the outside diameter range that expands of the portion of closing gas is 1.5% -3% of bullet body connecting portion diameter.
Furthermore, an annular deformation groove is arranged on the bottom end face of the air closing part, and the depth of the deformation groove is 10% of the total height of the air closing bottom push.
Further, the density of the elastomer 1 is 7850kg -3 The ultra-high strength alloy steel with Rockwell hardness of 45HRC, tensile strength of 1400MPa and yield strength of 1270MPa enhances the strength, plasticity and toughness of the elastomer and can improve the penetration performance of the elastomer.
Furthermore, the head of the bullet body is in a pointed oval shape, a flat head shape, a semispherical shape or a pointed cone shape, the body of the bullet body is a cylinder, and a threaded connection part is arranged at the tail part of the bullet body.
Furthermore, a screw hole matched with the threaded connecting part is formed in the axis direction of the projectile body connecting part.
The invention has the following beneficial effects:
the invention solves the problem of air leakage in the process of launching the caliber projectile body such as a penetration test and the like, can avoid scratching the bore, improves the projectile body launching kinetic energy, has good landing posture and increases the penetration capability of the projectile body to a target.
Description of the drawings:
FIG. 1 is a block diagram of the present invention.
Fig. 2 is a structural view of the projectile body.
Fig. 3 is a structural view of the air-closed bottom push.
Fig. 4 is a block diagram of a conventional projectile body without a closed bottom push.
In the figure:
1. a body of elastomer; 2. closing the air and pushing the bottom; 11. a threaded connection; 21. a projectile attachment portion; 22. a gas-blocking part; 23. deforming the groove; 24. and a screw hole.
The specific implementation mode is as follows:
the invention is further described below with reference to the accompanying drawings.
Example one
Referring to fig. 1 to 3, the projectile body structure with closed bottom push of the present invention comprises a projectile body 1 and a closed bottom push 2. The head of the projectile body 1 is in a pointed oval shape, a flat head shape, a semispherical shape or a pointed cone shape, the projectile body of the projectile body 1 is a cylinder, the length-diameter ratio of the projectile body is 5, the mass of the projectile body is about 688g, a threaded connection part 11 is arranged at the projectile tail part of the projectile body 1, and the air-closed bottom push 2 is in threaded connection with the threaded connection part 11.
The gas-closed bottom push 2 comprises an integrally formed projectile body connecting portion 21 and a gas-closed portion 22, the projectile body connecting portion 21 is in threaded connection with the tail portion of the projectile body 1, the outer diameter of the projectile body connecting portion 21 is equal to the outer diameter of the projectile body 1, the gas-closed portion 22 is of a conical structure with the bottom portion expanding outwards, and the diameter range of the gas-closed portion 22 expanding outwards is 1.5% -3% of the diameter of the projectile body connecting portion 21. A screw hole 24 adapted to the screw connection portion 11 is provided in the axial direction of the projectile connection portion 21.
An annular deformation groove 23 is provided on the bottom end face of the air-closing portion 22, and the depth of the deformation groove 23 is 10% of the total height of the air-closing bottom push 2. The deformation groove 23 can provide a deformable margin for the projectile to be extruded and propelled in the bore, and the closed bottom pusher 2 is prevented from scratching the bore.
The invention relates to an elastomer 1 ultrahigh-strength alloy steel, which comprises the following parameters: density 7850kg.m -3 Rockwell hardness of 45HRC, tensile strength of 1400MPa, yield strength of 1270MPaThe hardening coefficient is 810MPa, and the hardening index is 0.48. The ultrahigh-strength alloy steel enhances the strength, plasticity and toughness of the elastomer and can improve the penetration performance of the elastomer. The gas-closed bottom push 2 is made of MC nylon, so that the elasticity and the wear resistance of the bottom push are enhanced.
Example two
Respectively processing a common projectile body (as shown in figure 4) and a projectile body with a closed bottom and ensuring that the quality of the two projectile bodies is equivalent. Under the condition of vertical incidence, a projectile penetration marble target test is carried out. The amount of the fire, the initial velocity and penetration depth of the two types of projectiles when fired are shown in table 1. As can be seen from the table, when the explosive amount is 75g, the two projectile velocities are 252 m/s and 448 m/s respectively, and the penetration depth to the marble target is 100 mm and 142 mm respectively. When the explosive amount is 95g, the speeds of the two types of bullets are 318 m/s and 632 m/s respectively, and the penetration depth of the marble target is 145 mm and 227 mm respectively. It can be seen that compared with the common projectile body, after the gas-closing bottom pushing is designed, when the explosive quantity is 75g, the projectile body speed is increased by 77.7%, and the penetration depth is increased by 42%; when the explosive amount is 95g, the speed of the projectile body is increased by 98.7 percent, and the penetration depth is increased by 56.6 percent. Therefore, compared with the common projectile body, the utilization rate of the projectile body with the gas-closing bottom pushing function on a power source is obviously improved, the projectile body is remarkably accelerated, and the penetration performance can be greatly improved.
TABLE 1 penetration test results for conventional and bottoming projectiles with gas block
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (5)
1. The utility model provides a bullet body structure that pushes away at bottom of area closed gas which characterized in that: comprises that
An elastomer (1);
the gas-tight bottom push device comprises a gas-tight bottom push part (2), wherein the gas-tight bottom push part (2) is made of MC nylon and comprises an integrally formed elastomer connecting part (21) and a gas-tight part (22), the elastomer connecting part (21) is in threaded connection with the tail part of an elastomer (1), the outer diameter of the elastomer connecting part (21) is equal to that of the elastomer (1), the gas-tight part (22) is of a conical structure with the bottom part expanding outwards, and the diameter range of the gas-tight part (22) expanding outwards is 1.5% -3% of the diameter of the elastomer connecting part (21).
2. The closed-gas bottom-push elastomeric structure of claim 1, wherein: the bottom end face of the air closing part (22) is provided with an annular deformation groove (23), and the depth of the deformation groove (23) is 10% of the total height of the air closing bottom push (2).
3. The closed-gas bottom-push elastomeric structure of claim 1, wherein: the elastomer (1) has a density of 7850kg -3 The ultra-high strength alloy steel has Rockwell hardness of 45HRC, tensile strength of 1400MPa and yield strength of 1270 MPa.
4. The closed-gas bottom-push elastomeric structure of claim 1, wherein: the head of the bullet body (1) is in a pointed oval shape, a flat head shape, a semispherical shape or a pointed cone shape, the bullet body of the bullet body (1) is a cylinder, and a thread connecting part (11) is arranged at the tail part of the bullet body (1).
5. The closed bottom-push elastomeric structure of claim 4 wherein: and a screw hole (24) matched with the threaded connecting part (11) is formed in the axis direction of the projectile body connecting part (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210377535.5A CN115979075A (en) | 2022-04-12 | 2022-04-12 | Projectile body structure with air-tight bottom push |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210377535.5A CN115979075A (en) | 2022-04-12 | 2022-04-12 | Projectile body structure with air-tight bottom push |
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| Publication Number | Publication Date |
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| CN115979075A true CN115979075A (en) | 2023-04-18 |
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| CN202210377535.5A Pending CN115979075A (en) | 2022-04-12 | 2022-04-12 | Projectile body structure with air-tight bottom push |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116398643A (en) * | 2023-04-26 | 2023-07-07 | 南京理工大学 | Special-shaped closed gas ring applied to rail balance gun |
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2022
- 2022-04-12 CN CN202210377535.5A patent/CN115979075A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116398643A (en) * | 2023-04-26 | 2023-07-07 | 南京理工大学 | Special-shaped closed gas ring applied to rail balance gun |
| CN116398643B (en) * | 2023-04-26 | 2023-10-31 | 南京理工大学 | Special-shaped closed gas ring applied to rail balance gun |
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