A projectile seat and projectile

Abstract

The application provides a bullet body seat and a bullet, and a plurality of flow guide holes are arranged on the bottom of the annular groove of the small-end cavity of the bullet body seat, so that a large amount of high-temperature and high-pressure gunpowder gas is generated at the back of the bullet body seat after the bullet is filled and fired, the generated gunpowder gas rapidly enters the gap between the belt and the annular groove through the flow guide holes, and the gunpowder gas acts on the inner side of the belt instantaneously. After the high-temperature and high-pressure gunpowder gas acts on the inner surface of the belt, the belt is pressed and expanded, and the outer surface of the belt is tightly combined with the inner wall of the barrel, so that the phenomenon that the belt and the barrel are not fully closed during the high-speed movement of the bullet is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of projectile, in particular, relates to a projectile seat and a projectile. BACKGROUND

[0002] Increasing the initial velocity of the projectile is one of the main ways to improve the power of the gun. The band is one of the important components of the projectile, and its performance directly affects the performance of the projectile and the gun. The band is located between the projectile and the barrel, and its main functions are as follows: ① closed air, centering, spin guiding and micro selection; ② improve the shooting density; ③ increase the initial velocity of the projectile and increase the range; ④ reduce the direct contact between the projectile and the barrel, thereby prolonging the service life of the barrel. Therefore, the band material is required to have good flexural flexibility, so that the band can produce obvious plastic flow and maintain precise combination with the barrel. In actual application, the band usually adopts the way of interference fit between the outer diameter of the band and the inner diameter of the barrel to achieve the purpose of closed air between the band and the barrel. With the high-speed movement of the projectile in the barrel, the band will also be worn out, resulting in the disappearance of the interference effect between the band and the barrel, which makes the band and the barrel inevitably appear the phenomenon of insufficient closed air. SUMMARY

[0003] The present application provides a projectile seat and a projectile to avoid the phenomenon of insufficient closed air between the band and the barrel during high-speed movement of the projectile.

[0004] In one aspect, the present application provides a projectile seat, which comprises:

[0005] The large-end cavity is a cylindrical cavity with one end closed and the other end open, and the open end is used for connecting with the wind cap;

[0006] The small-end cavity is a cylindrical cavity, the outer side of the cylindrical cavity is provided with an annular groove, and a plurality of flow guide holes penetrating the bottom of the annular groove are arranged in the annular groove along the circumferential direction; the end face of the closed end of the annular groove close to the closed end of the large-end cavity is connected with the closed end, and the central axis of the small-end cavity and the central axis of the large-end cavity are the same central axis, and the outer diameter of the small-end cavity is smaller than the outer diameter of the large-end cavity.

[0007] The end face of the closed end of the annular groove close to the closed end of the large-end cavity is connected with the closed end, and the central axis of the small-end cavity and the central axis of the large-end cavity are the same central axis, and the outer diameter of the small-end cavity is smaller than the outer diameter of the large-end cavity.

[0008] As an embodiment, the flow guide hole is a stepped hole, and the hole diameter of the stepped hole close to the annular groove is greater than the hole diameter of the stepped hole close to the inner cavity of the small-end cavity.

[0009] As an embodiment, the flow guide hole is a trapezoidal hole, and the large aperture of the flow guide hole is close to the annular groove.

[0010] As an embodiment, a gas cavity groove with a width greater than the diameter of the orifice of the flow guide hole near the annular groove and less than the width of the annular groove is arranged on the surface of the annular groove covering the flow guide hole, and the gas cavity groove is arranged with a depth for ensuring that the gas of the propellant uniformly fills the gap between the gas cavity groove and the single and acts on the inner side of the belt.

[0011] As an embodiment, an outer thread for external sealing ring connection is arranged on the outer side of the small-end cavity away from the annular groove.

[0012] In another aspect, a bullet includes the bullet seat, the belt, the wind cap 30 and the sealing ring of any of the above embodiments;

[0013] The wind cap 30 is connected with the large-end cavity of the bullet seat, the belt is filled in the annular groove, and the sealing ring is installed on the outer end surface of the small-end cavity of the bullet seat.

[0014] As an embodiment, the belt is made of a thermal expansion material, and when the temperature of the belt is lower than a deformation value, the shape of the belt remains unchanged, and when the temperature of the belt is higher than or equal to the deformation value, the shape of the belt expands and becomes larger.

[0015] As an embodiment, when the bullet seat is a bullet seat provided with a gas cavity groove, the width of the belt is at least 2 times the width of the gas cavity groove.

[0016] As an embodiment, the outer diameter of the sealing ring is less than the outer diameter of the belt, or the sealing ring is connected with the bullet seat through sealing glue.

[0017] The technical scheme provided by the present application can at least achieve the following beneficial effects:

[0018] The present application provides a bullet seat and a bullet. For the bullet seat, a plurality of flow guide holes are arranged on the bottom of the annular groove of the small-end cavity, so that after the bullet is filled and fired, a large amount of high-temperature and high-pressure propellant gas is generated at the rear of the bullet seat. The generated propellant gas rapidly enters the gap between the belt and the annular groove through the flow guide holes, so that the propellant gas acts on the inner side of the belt instantaneously. After the high-temperature and high-pressure propellant gas acts on the inner surface of the belt, the belt is pressed and expanded, and the outer surface of the belt is tightly attached to the inner wall of the barrel, thereby avoiding the phenomenon that the gap between the belt and the barrel is not fully closed during high-speed movement of the bullet. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of a bullet seat according to an exemplary embodiment of the present application;

[0020] Figure 2is a structural schematic diagram of a bullet seat provided with a gas cavity groove according to an example embodiment of the present application;

[0021] Figure 3 is a partial sectional view of a bullet according to an example embodiment of the present application;

[0022] Figure 4 is a schematic diagram of a bullet in high-speed operation according to an example embodiment of the present application. DETAILED DESCRIPTION

[0023] The example embodiments will be described in detail herein with reference to the accompanying drawings. In the following description, unless otherwise indicated, like numbers in the different drawings represent similar or analogous elements. The following description of example embodiments is not representative of all embodiments consistent with the present application. Rather, it is merely an example of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0024] The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The use of the terms "first", "second" and like terms, throughout the specification and claims unless otherwise stated, are not intended to imply any sequence or order, but rather are useful to distinguish between two separate, distinct, and independent components, steps, transformations, and / or structures, which can or can not be described previously. Similarly, the use of the terms "a" or "an", or "the" and like terms, are not intended to refer to a quantity of one, but rather are used to denote at least one, unless otherwise indicated. "Plural" or "a plurality" refer to two or more. The terms "front", "back", "top", "bottom", "up", "down", and the like, as well as other directional terms, are used herein for convenience with reference to the orientation of components as illustrated in the drawings, and are not intended to be limiting of the application to any specific position or spatial orientation. The terms "comprises", "comprising", "includes", "including" and the like can mean incorporating, including, containing, housing, having, grouping, or the like of elements preceding the term in the claim, and the like, and are not meant to be construed as limiting the application to a specific number of elements or steps as such. The term "connected" or "coupled" or the like is not limited to physical or mechanical connections or linkages, but also can include electrical connections or linkages, whether direct or indirect.

[0025] Referring to Figure 1 , Figure 1 is a structural schematic diagram of a bullet seat 1010 according to an example embodiment of the present application. The bullet seat 10 can include a large end cavity 11 and a small end cavity 12.

[0026] The big-end cavity 11 is a cylindrical cavity with one end closed and the other end open, and the open end is used to connect with the wind cap 30. The small-end cavity 12 is a cylindrical cavity, and the outer side of the cylindrical cavity is provided with an annular groove 13, and a plurality of flow guide holes 14 are arranged in the annular groove 13 along the circumferential direction and penetrate the bottom of the annular groove 13; the end face of the annular groove 13 close to the closed end of the big-end cavity 11 is connected with the closed end, and the central axis of the small-end cavity 12 is the same as the central axis of the big-end cavity 11, and the outer diameter of the small-end cavity 12 is smaller than the outer diameter of the big-end cavity 11.

[0027] In the embodiment, the connection between the open end of the big-end cavity 11 and the wind cap 30 can be welding, can also be threaded connection, can also be adhesive connection, and the embodiment is not limited thereto. In one embodiment of the threaded connection, the open end is provided with internal threads, the wind cap 30 is provided with external threads, and the internal threads of the open end are connected with the external threads of the wind cap 30 to achieve threaded connection.

[0028] In the embodiment, the bottom of the annular groove 13 is provided with a plurality of flow guide holes 14. In actual application, one end of the flow guide hole 14 is directed to the gunpowder in the big-end cavity 11. Thus, after the gunpowder is ignited, the gunpowder gas jet is uniformly guided into the inside of the belt through the flow guide hole 14, and the belt tightly abuts against the outer barrel under the overflow effect of the gas. Even if the outer side of the belt is worn, the gas will further compensate for the gap between the belt and the barrel caused by the wear to further abut against the inside of the belt, so that the belt and the barrel are kept in interference fit.

[0029] In order to further ensure that the gunpowder gas fills the annular groove 13 and the belt and acts on the inside of the belt, in some embodiments, the flow guide hole 14 is a trapezoidal hole, and the large hole of the flow guide hole 14 is close to the annular groove 13. In the embodiment, the large hole of the flow guide hole 14 is close to the annular groove 13, and the small hole is close to the inner cavity of the small-end cavity 12. In the embodiment, when the gunpowder gas flows into the gap between the belt and the flow guide hole 14, the flow direction of the gunpowder gas is changed due to the resistance of the belt, and the gas backflow is generated, which increases the gas pressure that hinders the gunpowder gas from flowing into the gap. Based on this, the flow guide hole 14 can be designed as a trapezoidal hole to increase the gap between the flow guide hole and the belt, and to increase the contact surface between the belt and the gunpowder gas, so as to avoid the instantaneous local action of the gunpowder gas and the inner surface of the nylon belt as much as possible, which causes the nylon belt to not expand uniformly and affects the sealing effect.

[0030] In other embodiments, the flow guide hole 14 is a stepped hole, and the hole diameter of the stepped hole close to the annular groove 13 is greater than the hole diameter of the stepped hole close to the inner cavity of the small-end cavity 12. In this way, the gunpowder gas fills the annular groove 13 and the inside of the belt and acts on the inside of the belt, so that the gunpowder gas always abuts against the inside of the belt and is not affected by the wear of the belt.

[0031] After the projectile is loaded and fired, a large amount of high-temperature, high-pressure propellant gas is generated behind the projectile base 10. This propellant gas rapidly enters the gap between the guide hole 14 and the nylon cartridge band through the guide hole 14. The propellant gas interacts momentarily and locally with the inner surface of the nylon cartridge band, causing the nylon cartridge band to expand unevenly, affecting the sealing effect. Therefore, in some embodiments, such as... Figure 2 As shown, the annular groove 13 has a gas cavity groove 15 at the groove surface covering the guide hole 14. The gas cavity groove 15 has a width greater than the diameter of the orifice of the guide hole 14 near the annular groove 13 and smaller than the width of the annular groove 13. The gas cavity groove 15 has a depth to ensure that the propellant gas fills the gap between the gas cavity groove 15 and the bullet belt evenly and acts on the inner side of the bullet belt. This avoids the instantaneous local interaction between the propellant gas and the inner surface of the nylon bullet belt, so that the propellant gas can act evenly on the inner side of the bullet belt. This ensures that the outer side of the bullet belt is in full contact with the inner side of the barrel. Even if the bullet belt wears due to the high-speed friction of the projectile, it can still support the bullet belt to further press against the barrel so that it is not affected by the wear of the bullet belt. As can be seen, after the projectile is loaded and fired, a large amount of high-temperature and high-pressure propellant gas is generated behind the projectile base 10. The generated propellant gas quickly enters the gas cavity groove 15 through the guide hole 14. The gas cavity groove 15 can prevent the propellant gas from interacting with the inner surface of the nylon bullet belt momentarily and locally, which would cause the nylon bullet belt to expand unevenly and affect the sealing effect.

[0032] To prevent insufficient propellant gas pressure from causing the cartridge band to not maintain a constant interference fit with the barrel, in some embodiments, a movable locking plate is provided near the opening of the annular groove 13 at the guide hole 14. When the air pressure between the gas chamber groove 15 and the cartridge band is less than the internal air pressure in the small end cavity 12, the movable locking plate is in the open state; when the air pressure between the gas chamber groove 15 and the cartridge band is greater than or equal to the internal air pressure in the small end cavity 12, the movable locking plate is in the closed state. In this way, the air pressure between the gas chamber groove 15 and the cartridge band can always maintain support for the cartridge band to further press against the barrel. Even if the cartridge band wears down, and the air pressure between the gas chamber groove 15 and the cartridge band decreases due to increased space, the movable locking plate will be opened again when the air pressure between the gas chamber groove 15 and the cartridge band is less than the internal air pressure in the small end cavity 12, thus further compensating for the air pressure between the gas chamber groove 15 and the cartridge band.

[0033] In some embodiments, the cartridge belt can be made of nylon with a thermoplasticity above a threshold, allowing the belt to undergo significant plastic flow to maintain a precise bond with the barrel. Furthermore, nylon cartridge belts cause less wear on the barrel compared to traditional extruded metal cartridge belts.

[0034] It can be seen that the bullet seat 10 provided by the embodiment is applied, the annular groove 13 of the small-end cavity 12 in the bullet seat 10 is provided with a plurality of flow guide holes 14, so that a large amount of high-temperature and high-pressure propellant gas is generated at the rear of the bullet seat 10 after the bullet is filled and fired, the generated propellant gas rapidly enters the gap between the belt and the annular groove 13 through the flow guide holes 14, so that the propellant gas acts on the inner side of the nylon belt instantaneously, and after the high-temperature and high-pressure propellant gas acts on the inner surface of the belt, the belt is expanded under pressure, and the outer surface of the belt is tightly attached to the inner wall of the barrel, thereby avoiding the phenomenon that the belt and the barrel are inevitably insufficiently closed during high-speed movement of the bullet.

[0035] In another aspect, the embodiment of the present application also provides a bullet, as shown in the figure, which comprises the bullet seat 10, the belt 20, the wind cap 30 and the sealing compression ring 40 in any of the above embodiments. Figure 3

[0036] The wind cap is connected with the large-end cavity 11 of the bullet seat 10, the belt 20 is filled in the annular groove 13, and the sealing compression ring 40 is installed on the outer end surface of the small-end cavity 12 of the bullet seat 10.

[0037] In some embodiments, the belt 20 is made of a thermal expansion material, the shape of the belt 20 remains unchanged when the temperature of the belt 20 is lower than a deformation value, and the shape of the belt 20 is expanded and becomes larger when the temperature of the belt 20 is higher than or equal to the deformation value. The large amount of high-temperature and high-pressure propellant gas generated at the rear of the bullet seat 10 and the high-speed friction between the belt 20 and the barrel both cause the temperature of the belt 20 to rise, and when the temperature of the belt 20 is higher than or equal to the deformation value, the shape of the belt 20 is expanded and becomes larger, so that even if the belt 20 is worn, the belt 20 can rely on its own expansion to keep an interference fit with the barrel during the continuous rising of the temperature of the belt 20.

[0038] In some embodiments, when the bullet seat 10 is the bullet seat 10 provided with the gas cavity groove 15 in the above embodiment, the width of the belt 20 is at least 2 times the width of the gas cavity groove 15. In this way, in operation, the flow guide holes 14 guide the propellant gas into the gas cavity groove 15, the propellant gas is evenly filled in the gas cavity, and the inner surface of the nylon belt 20 is uniformly stressed.

[0039] In some embodiments, the outer diameter of the sealing compression ring 40 is smaller than the outer diameter of the belt 20. In other embodiments, the sealing compression ring 40 is connected with the bullet seat 10 through sealing glue, so that the sealing compression ring 40 and the bullet seat 10 are not only firmly connected, but also can achieve the purpose of further sealing.

[0040] ​In the embodiment, the outer diameter of the band 20 should be equal to the maximum outer diameter of the body seat 10, which is equal to or smaller than the inner diameter of the barrel, so that the whole projectile can be directly loaded into the straight bore of the barrel, providing a new sealing solution for the smoothbore gun or other similar launch structures that need to be loaded with the same caliber. In addition, the projectile of the embodiment can fully utilize the energy of the powder gas, so that the band 20 is constantly expanded by the action of the powder gas during the high-speed movement of the projectile in the barrel, which can ensure the sealing effect of the projectile during movement.

[0041] When the body seat 10 is provided with the air chamber, the working principle of the projectile is as follows: Figure 4 After the projectile is loaded and fired, a large amount of high-temperature and high-pressure powder gas is generated at the rear of the body seat 10, and the generated powder gas rapidly enters the air chamber through the flow guide hole 14. The air chamber is provided to avoid the instantaneous local action of the powder gas on the inner surface of the nylon band 20, which causes the nylon band 20 to be unable to expand uniformly, affecting the sealing effect. After the high-temperature and high-pressure powder gas uniformly acts on the inner surface of the nylon band 20, the nylon band 20 is expanded under pressure, and its outer surface is tightly fitted with the inner wall of the barrel. During the whole movement of the projectile in the barrel, the outer side of the nylon band 20 is constantly worn, and at the same time, the nylon band 20 is constantly expanded under pressure, realizing the sealing effect of the projectile during movement. At the same time, the sealing pressure ring 40 and the table surface of the body seat 10 limit the axial movement of the nylon band 20 when it expands, preventing it from falling off during movement.

[0042] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An elastomeric seat, characterized by, The bullet body seat comprises: a large-end cavity, which is a cylindrical cavity with one end closed and the other end open, and the open end is used for connecting with the wind cap; a small-end cavity, which is a cylindrical cavity, and the outer side of the cylindrical cavity is provided with an annular groove, a plurality of flow guide holes penetrating the bottom of the annular groove are arranged in the annular groove along the circumferential direction, the end face of the annular groove close to the closed end of the large-end cavity is connected with the closed end, the central axis of the small-end cavity is the same as the central axis of the large-end cavity, and the outer diameter of the small-end cavity is smaller than the outer diameter of the large-end cavity, wherein the groove face of the annular groove covering the flow guide holes is provided with a gas cavity groove with a width greater than the hole diameter of the flow guide holes close to the annular groove and smaller than the width of the annular groove, and the gas cavity groove is provided with a depth for ensuring that the combustion gas of the powder uniformly fills the gap between the gas cavity groove and the belt and acts on the inner side of the belt.

2. The elastomeric seat of claim 1, wherein, The flow guide hole is a stepped hole, and the hole diameter of the stepped hole close to the annular groove is greater than the hole diameter of the stepped hole close to the inner cavity of the small-end cavity.

3. The elastomeric seat of claim 1, wherein, The flow guide hole is a trapezoidal hole, and the large hole of the flow guide hole is close to the annular groove.

4. The elastomeric seat of claim 1, wherein, The outer side of the small-end cavity away from the annular groove is provided with an external thread for connecting with the external sealing compression ring.

5. The elastomeric seat of claim 4, wherein, The hole of the flow guide hole close to the annular groove is also provided with a movable locking piece covering the hole, and when the gas pressure between the gas cavity groove and the belt is less than the gas pressure in the inner cavity of the small-end cavity, the movable locking piece is in an open state, and when the gas pressure between the gas cavity groove and the belt is greater than or equal to the gas pressure in the inner cavity of the small-end cavity, the movable locking piece is in a closed state.

6. A projectile characterized by, The bullet comprises any one of the bullet body seat, the belt, the wind cap and the sealing compression ring in claims 1-5; The wind cap is connected with the large-end cavity of the bullet body seat, the belt is filled in the annular groove, and the sealing compression ring is installed on the outer end face of the small-end cavity of the bullet body seat.

7. The projectile of claim 6, wherein, The belt is made of a thermal expansion material, and when the temperature of the belt is lower than a deformation value, the shape of the belt remains unchanged, and when the temperature of the belt is higher than or equal to the deformation value, the shape of the belt expands and becomes larger.

8. The projectile of claim 6, wherein, When the bullet body seat is a bullet body seat provided with a gas cavity groove, the width of the belt is at least 2 times the width of the gas cavity groove.

9. The projectile of claim 6, wherein, The outer diameter of the sealing compression ring is smaller than the outer diameter of the belt, or the sealing compression ring is connected with the bullet body seat through sealing glue.

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