Combustion light gas gun projectile with belt mechanism and chamber pressure control method thereof

Abstract

The present invention relates to a combustion light gas cannon projectile equipped with a belt mechanism and a chamber pressure control method thereof, belonging to the field of launch technology. A combustion light gas cannon projectile equipped with a belt mechanism comprises a projectile body, a wind cap fixed in front of the projectile body, a front annular groove provided on the outer surface of the projectile body, a front belt fixed in the front annular groove, and a rear annular groove provided on the outer surface of the projectile body, a rear belt fixed in the rear annular groove; the front belt is annular and is sleeved on the outer side of the projectile body. Its outer surface is a truncated cone with a smaller front and a larger rear surface, and its length is consistent with the width of the front annular groove. Compared with the prior art, the technical effect of the present invention is that the present invention is equipped with two belt mechanisms, which respectively achieve sealing for the two stages, and can achieve a higher chamber pressure.

Description

Technical Field

[0001] The present invention relates to a combustion light gas gun projectile provided with a belt mechanism and a chamber pressure control method thereof, belonging to the field of launch technology. Background Art

[0002] Hydrogen-oxygen combustion launch technology uses low-molecular-weight hydrogen and other light gases as working fluids to achieve extremely high initial velocities. Its essence is to use the combustion of a hydrogen-oxygen mixture to form a high-temperature, high-pressure light gas to expand and perform work to achieve extremely high initial velocities. When conventional artillery is fired, the initial pressure is generally the ambient pressure, and the projectile starting pressure is generally around 30 MPa. Since the propellant used in conventional artillery is solid particles, there is no need to consider the sealing problem during the installation of the propellant. Conventional artillery projectiles usually use only one belt. Since the starting pressure of conventional artillery is much smaller than that of a combustion light gas gun, the contact area between the belt and the barrel is small. When the starting pressure is reached, the belt is squeezed in through extrusion and deformation, and the projectile begins to move.

[0003] In order to achieve better sealing, there is already a belt used on the shells, which can be found in the patent document with authorization publication number CN210242584U.

[0004] However, the starting pressure of a light gas cannon is about 172 MPa, which is much higher than the starting pressure of a conventional cannon (30 MPa). This seal cannot adapt to light gas cannon shells. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: how to design a combustion light gas gun projectile provided with a belt mechanism to achieve a higher chamber pressure.

[0006] The technical solution of the present invention is specifically as follows:

[0007] A combustion light gas gun projectile with a belt mechanism comprises a projectile body, a wind cap fixed in front of the projectile body, a front annular groove provided on the outer surface of the projectile body, a front belt fixed in the front annular groove, and a rear annular groove provided on the outer surface of the projectile body, a rear belt fixed in the rear annular groove; the front belt is annular and is sleeved on the outer side of the projectile body, and its outer surface is a frustum with a smaller front and a larger rear, and its length is the same as the width of the front annular groove;

[0008] The rear belt is annular as a whole, with a fixed embedded part on the inner side of the front, and the embedded part is distributed in the rear annular groove. The rear part of the rear belt is a frustum part that is smaller in front and larger in the back, and the maximum thickness of the frustum part is greater than the maximum thickness of the front belt.

[0009] The rear elastic band is integrally molded with the insert.

[0010] The projectile body and the wind cap are fixed by threads, and the threaded connection part is the front centering part.

[0011] A screw hole is opened at the tail of the projectile body.

[0012] The projectile body is hollow as a whole.

[0013] Both the front and rear belts are made of copper.

[0014] A chamber pressure control method using the above-mentioned combustion light gas gun projectile equipped with a belt mechanism comprises the following steps:

[0015] S1. At the beginning, manually push the projectile body so that the front belt is embedded in the barrel, and the rear part of the front belt is stuck in the connection between the slope and the barrel;

[0016] S2. Then, hydrogen and oxygen are added. As the chamber pressure continues to increase, the projectile body continues to move forward, and the front belt gradually enters the barrel. The front belt enters the barrel and has an interference fit with the barrel wall, forming the first sealing ring;

[0017] S3. When the hydrogen and oxygen filling is completed, the front belt has completely entered the barrel, and the first sealing ring has reached its thickest. At the same time, a portion of the front of the rear belt has also reached the connection between the ramp and the barrel. The rear belt that has entered the barrel has an interference fit with the barrel wall, forming a second sealing ring.

[0018] S4. When hydrogen and oxygen burn in the barrel, the entire projectile body enters the barrel and slides inside it. During the sliding process of the projectile body in the barrel, the rear belt enters the barrel and the second sealing ring reaches its thickest.

[0019] Compared with the prior art, the technical effect of the present invention is that the present invention is provided with two belt mechanisms, which respectively realize sealing of the two stages and can achieve a higher chamber pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the present invention.

[0021] Figure 2 It is a schematic cross-sectional view of the present invention.

[0022] Figure 3 It is a schematic diagram of the present invention in use. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments thereof.

[0024] like Figure 1-2 A combustion light gas gun projectile with a belt mechanism includes a projectile body 2, a wind cap 1 fixed in front of the projectile body 2, a front annular groove 21 is provided on the outer surface of the projectile body 2, a front belt 3 is fixed in the front annular groove 21, and a rear annular groove 22 is provided on the outer surface of the projectile body 2, a rear belt 4 is fixed in the rear annular groove 22.

[0025] The front belt 3 is annular and is placed on the outside of the projectile body 2. Its outer surface is a frustum with a small front and a large back. Its length (the dimension in the front and back direction is Figure 2 The left and right directions) are consistent with the width of the front annular groove 21.

[0026] The rear elastic belt 4 is annular as a whole, and the inner side surface of the front portion thereof is fixed with an embedded portion 41, which is distributed in the rear annular groove 22. The rear portion of the rear elastic belt 4 is a truncated cone portion 42 with a smaller front portion and a larger rear portion. The thickness of the truncated cone portion 42 (the dimension in the radial direction is Figure 2 The maximum value of the vertical direction) is greater than the maximum value of the thickness of the front elastic belt 3.

[0027] The rear elastic band 4 and the embedded portion 41 are integrally formed.

[0028] For the convenience of fixation, the projectile body 2 and the hood 1 are fixed via a thread 11, and the threaded connection portion is the front centering portion.

[0029] In order to facilitate the projectile test, a screw hole 23 is opened at the tail of the projectile body 2.

[0030] In order to control the weight of the projectile, the projectile body 2 is hollow as a whole.

[0031] The front belt 3 and the rear belt 4 are both made of copper, and copper performs better than brass when the belts are squeezed in.

[0032] Its working principle is:

[0033] S1. At the beginning, manually push the projectile body 2, see Figure 3 , so that the front belt 3 is embedded in the barrel 90, and the rear section of the front belt 3 is stuck in the connection between the slope 91 and the barrel 90.

[0034] S2. Then, hydrogen and oxygen are added. As the chamber pressure continues to increase, the projectile body 2 continues to move forward, and the front belt 3 gradually enters the barrel 90. The front belt 3 entering the barrel 90 is squeezed by the wall of the barrel 90 and is basically all pressed into the front annular groove 21. The part exposed outside the front annular groove 21 is interference-fitted with the wall of the barrel 90, forming a first sealing ring to achieve sealing during hydrogen and oxygen addition.

[0035] In this step, the front belt 3 is basically pressed into the front annular groove 21, and no residue will remain in the barrel 90, so as to avoid the residue increasing the friction on the projectile as much as possible.

[0036] S3. When the hydrogen and oxygen filling is completed, the chamber pressure is generally 35MPa. At this time, the front belt 3 has all entered the barrel 90, and the first sealing ring has reached its thickest (the dimension in the front and rear direction is Figure 2In the left and right directions), at the same time, a part (a very small part) of the front part of the rear belt 4 also reaches the connection between the slope chamber 91 and the barrel 90. The rear belt 4 entering the barrel 90 is squeezed by the wall of the barrel 90 and is basically all pressed into the rear annular groove 22. The part exposed outside the rear annular groove 22 has an interference fit with the wall of the barrel 90, forming a second sealing ring (the second sealing ring at this time is still very thin). Even under a pressure of 35 MPa, there will be no leakage.

[0037] S4. During the combustion of hydrogen and oxygen within the chamber, the chamber pressure reaches approximately 172 MPa. Under this pressure, the entire projectile body 2 (including the rear band 4) enters and slides within the barrel 90, ejecting the projectile. As the projectile body 2 slides within the barrel 90, the rear band 4 fully enters the barrel 90, and the second sealing ring reaches its maximum thickness, minimizing pressure leakage and providing greater acceleration to the projectile.

[0038] For other contents, please refer to the prior art.

[0039] The above description is only the preferred embodiment of the present invention. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be regarded as the scope of protection of the present invention.

Claims

1. A combustion light gas gun projectile with a belt mechanism, comprising a projectile body (2), a wind cap (1) fixed in front of the projectile body (2), a front annular groove (21) provided on the outer surface of the projectile body (2), a front belt (3) fixed in the front annular groove (21), and a rear annular groove (22) provided on the outer surface of the projectile body (2), characterized in that: The rear annular groove (22) is internally fixed with a rear elastic belt (4); The front belt (3) is annular and is placed on the outside of the projectile body (2). Its outer surface is a frustum with a smaller front and a larger rear. Its length is consistent with the width of the front annular groove (21). The rear elastic belt (4) is annular as a whole, and an embedded portion (41) is fixed on the inner side surface of the front portion thereof, and the embedded portion (41) is distributed in the rear annular groove (22). The rear portion of the rear elastic belt (4) is a truncated cone portion (42) that is smaller in front and larger in the rear, and the maximum thickness of the truncated cone portion (42) is greater than the maximum thickness of the front elastic belt (3); When hydrogen and oxygen are added, as the chamber pressure continues to increase, the projectile body (2) continues to move forward, and the front belt (3) gradually enters the barrel (90). The front belt (3) entering the barrel (90) is interference-fitted with the barrel wall of the barrel (90), forming a first sealing ring; When the hydrogen and oxygen filling is completed, the front belt (3) is completely inserted into the barrel (90), and the first sealing ring reaches its thickest. At the same time, a portion of the front portion of the rear belt (4) also reaches the connection between the ramp (91) and the barrel (90), and the rear belt (4) that has entered the barrel (90) is interference-fitted with the barrel wall of the barrel (90), forming a second sealing ring. When the hydrogen and oxygen in the chamber burn, the entire projectile body (2) enters the barrel (90) and slides therein. During the sliding process of the projectile body (2) in the barrel (90), the rear belt (4) all enters the barrel (90), and the second sealing ring reaches its thickest.

2. The light gas incendiary gun projectile with a belt mechanism according to claim 1, characterized in that: The rear elastic belt (4) and the embedded portion (41) are integrally formed.

3. The light gas incendiary gun projectile with a belt mechanism according to claim 2, characterized in that: The projectile body (2) and the wind cap (1) are fixed via a thread (11), and the threaded connection portion serves as a front centering portion.

4. The light gas incendiary gun projectile with a belt mechanism according to claim 3, characterized in that: The tail of the projectile body (2) is provided with a screw hole (23).

5. The combustion light gas gun projectile with a belt mechanism according to claim 4, characterized in that: The projectile body (2) is hollow as a whole.

6. The light gas incendiary gun projectile with a belt mechanism according to claim 5, characterized in that: The front belt (3) and the rear belt (4) are both made of copper.

7. A chamber pressure control method, characterized in that: Using the combustion light gas gun projectile provided with a belt mechanism as claimed in claim 1 comprises the following steps: S1. At the beginning, manually push the projectile body (2) so that the front belt (3) is embedded in the barrel (90), and the rear section of the front belt (3) is stuck in the connection between the slope chamber (91) and the barrel (90); S2, hydrogen and oxygen are then added, and as the chamber pressure continues to increase, the projectile body (2) continues to move forward, and the front belt (3) gradually enters the barrel (90). The front belt (3) entering the barrel (90) is interference-fitted with the barrel wall of the barrel (90), forming a first sealing ring; S3. When the hydrogen and oxygen filling is completed, the front belt (3) is completely inserted into the barrel (90), and the first sealing ring reaches its maximum thickness. At the same time, a portion of the front portion of the rear belt (4) also reaches the connection between the ramp (91) and the barrel (90), and the rear belt (4) that has entered the barrel (90) is interference-fitted with the barrel wall of the barrel (90), forming a second sealing ring. S4. When the hydrogen and oxygen in the chamber burn, the entire projectile body (2) enters the barrel (90) and slides therein. During the sliding process of the projectile body (2) in the barrel (90), the rear belt (4) enters the barrel (90) and the second sealing ring reaches its thickest.

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