A multi-stage belt projectile structure fired in series
By setting up multiple initial and additional tandem firing structures on the outer wall of the projectile, the aging problem caused by ablation and wear of the artillery body tube is solved, and more efficient body tube wear testing is achieved, shortening the test cycle and reducing costs.
Patent Information
- Application Number
- CN202510165021.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-14
- Publication Date
- 2025-04-04
AI Technical Summary
The existing artillery body tubes are ablated and worn due to high temperature, high pressure gas and friction during the launch of the shell, resulting in aging and shortening of the life of the body tubes. The actual injection test cycle is long, the cost is high, and it is easily disturbed by external environment, resulting in test errors.
The multi-stage ammunition belt projectile structure with tandem firing is adopted. By setting up multiple initial and additional ammunition belts on the outer wall of the projectile, a series of fires with single strikes and multiple ammunition belts are achieved, saving the number of projectiles, accelerating the wear of the body tube, and shortening the test cycle.
Through the multi-elastic belt structure, the inner wall of the body tube is caused to a greater wear on the projectile during the launch process, and the purpose of accelerating the wear of the body tube is achieved, effectively reducing the number of projectiles used, shortening the test cycle, reducing costs, avoiding interference from external environmental factors, and improving the accuracy of the test results.
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Figure CN119756068A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of projectile structures, and in particular to a multi-segment belt projectile structure fired in series. Background Art
[0002] The gun barrel is the core component of the artillery system, usually made of high-strength alloy steel, rare earth steel, etc., including the bore (that is, the space inside the gun barrel used to accommodate and guide the firing of shells, including the chamber and the ramp), rifling (used to maintain flight stability, improve shooting accuracy and range) and muzzle device (including muzzle brake and flash suppressor, etc.).
[0003] During the process of firing a shell from a gun barrel, the combustion of gunpowder will generate a large amount of high-temperature, high-pressure gas, and the outer wall of the shell will form intense friction with the inner wall of the barrel, causing ablation and wear on the inside of the barrel, which not only accelerates the aging of the barrel and shortens the life of the barrel (severely aged barrels greatly increase the probability of barrel explosion), but also easily damages and flattens the rifling inside the barrel, affecting the shooting accuracy and range of the shell. Therefore, in the process of structural design and material development of the gun barrel, it is usually necessary to test the degree of wear and ablation of the barrel to accurately evaluate the life of the gun barrel and the degree of rifling wear; in the prior art, this evaluation is usually carried out by live ammunition simulation shooting, that is, after the barrel is continuously and repeatedly fired with live shells, the barrel is subjected to anatomical testing after the barrel has accumulated its life, and then the evaluation of the structure and materials of the barrel is completed. However, due to the continuous research and development of materials and the continuous optimization of structures, the service life of existing artillery barrels is relatively long, and the number of actual firing projectiles required is large (usually measured in thousands of projectiles), the test cycle is long, the test efficiency is low, and the number of test consumables (i.e. projectiles) is large and the test cost is high; at the same time, the extension of the test cycle will lead to inconsistent external environment throughout the test cycle, interference from external environmental factors during the actual firing process, and then test errors caused by the external environment. The accumulated test errors greatly affect the subsequent analysis of the damage mechanism of the artillery barrel and cause inaccurate evaluation of the barrel material and structure. Summary of the invention
[0004] In view of the problems existing in the above prior art, the purpose of the present invention is to provide a multi-segment belt projectile structure for serial firing, which realizes single firing and serial firing of multiple belts by squeezing and friction through the optimization of the projectile and belt structure, thereby saving the number of projectiles used, accelerating the wear degree of the barrel, shortening the firing test cycle, and improving the efficiency of the actual firing test. The purpose of the present invention is achieved through the following technical solutions: A multi-segment belt projectile structure for serial firing comprises a projectile body, wherein a multi-belt structure is arranged on the outer wall of the projectile body, wherein the multi-belt structure comprises an initial belt and a plurality of additional belts which are sequentially arranged in the outer circle of the projectile body in the opposite direction of the projectile body firing, wherein the initial belt and the additional belts are coaxially arranged with the projectile body; the width of the initial belt is greater than the width of the additional belt and the sizes of the plurality of additional belts are consistent; the outer circles of the side surfaces of the initial belt and the plurality of additional belts on the side close to the projectile body firing direction are both arranged as inclined surfaces with a conical longitudinal section; a chip storage groove is provided between the initial belt and the additional belt closest to it (i.e., the initial belt) and between the plurality of adjacent additional belts; and the initial belt, the additional belt and the projectile body are all made of the same material.
[0005] Based on further optimization of the above solution, the number of additional elastic belts is 2 to 10.
[0006] Based on further optimization of the above scheme, the width of the initial elastic band is 6-8 mm, the angle of its slope is 30-40°, and the height of the initial elastic band (i.e., the distance between the outer wall of the initial elastic band and the outer wall of the projectile body) is 0.6-1.0 mm.
[0007] Preferably, the forced extrusion amount of the initial bullet belt (forced extrusion amount = 2x bullet belt height + projectile body diameter - barrel positive line diameter) is 0.2-0.5 mm.
[0008] Based on further optimization of the above scheme, the distance between the tail of the initial belt and the front end of the projectile body (i.e., the striking end) is smaller than the distance between the center of mass of the projectile body and the front end of the projectile body (i.e., the tail of the initial belt is located in front of the center of mass of the projectile body).
[0009] Based on further optimization of the above scheme, the width of the additional elastic belt is 1 to 3 mm, and the height and angle of the inclined surface of the additional elastic belt are consistent with those of the initial elastic belt (the forced extrusion amount of the additional elastic belt is consistent with the forced extrusion amount of the initial elastic belt).
[0010] Based on further optimization of the above solution, the distance between the bottom of the chip storage groove and the outer wall of the projectile body is 0 to 0.03 mm.
[0011] Based on further optimization of the above scheme, the distance between the initial elastic belt and the additional elastic belt closest to it (i.e. the initial elastic belt), and the distance between multiple additional elastic belts, i.e. the width d of the chip storage groove is calculated by vt Curve and v-l The curve is obtained, specifically: First, get the fixed frequency when multiple projectiles are fired continuously f , and obtain the time interval between two consecutive shots t :
[0012] Then, according to the corresponding vt Curve and v-l Curve, get the speed of the projectile launched at the corresponding moment v ; Finally, the width d is obtained by the time interval t and the speed v: .
[0013] Based on further optimization of the above scheme, the vt Curve and v-l The curve is obtained by pre-simulating shooting, specifically: According to the basic equation of interior ballistics, that is: Shape function:
[0014] Burning rate equation:
[0015] Projectile motion equation:
[0016] Projectile velocity and travel equation:
[0017] The basic equation of interior ballistics is:
[0018] Where: p Indicates the pressure in the chamber; S Indicates the cross-sectional area of the barrel; It indicates the reduced diameter length of the free volume of the chamber; It means the chamber volume is reduced in diameter; l Indicates the travel of the projectile; f It indicates the power of gunpowder; Indicates the charge amount; Z Indicates the relative thickness of the gunpowder that has burned; v Indicates the speed of the projectile; Indicates the percentage of gunpowder burned; m Indicates the mass of the projectile; represents the adiabatic coefficient; represents the secondary work coefficient; Indicates the density of gunpowder; Indicates the remaining amount of gunpowder; I k Indicates the total impulse of pressure; n Indicates the combustion index; , , Indicates the shape characteristic of gunpowder; The burning rate equation in the basic equation of internal ballistics is simplified so that the burning index n=1. At the same time, continuous and uninterrupted projectile shooting is performed to obtain the internal ballistic equation of each projectile: Among them, the first projectile:
[0019] Where: k represents the adiabatic index; It indicates the flow coefficient of the barrel mouth; Indicates the gas pressure at the barrel mouth; Indicates the gas density at the barrel mouth; L Indicates the barrel length; A.C represents a constant; Burning rate equation:
[0020] Projectile velocity and travel equation:
[0021] Projectile motion equation:
[0022] Where: R x represents the compensation coefficient, ,in, The crowding coefficient, which represents the linear relationship, is obtained based on experimental data; l x represents the formation threshold of initial motion; Second round: Starting from the second round, the travel of each projectile in the barrel is changing, that is, the projectile travel l The trend of change is gradually increasing. At this time, the bullet motion equation has changed:
[0023]
[0024] Where: l d Indicates the length of a single projectile; The projectile travel of the third bullet increases by two projectile lengths, and the bullet motion equation changes. By analogy (i.e., the projectile travel of the fourth bullet increases by three projectile lengths, and the projectile travel of the fifth bullet increases by four projectile lengths), the projectile's length in the barrel is obtained. vt Curve and v-l Curve (where v-l The curve is a nonlinear continuous curve).
[0025] The technical solution of the present invention has the following technical effects: The present invention utilizes a multi-band structure composed of an initial band and a plurality of additional bands to form a projectile body. Compared with the existing single-band structure, during the firing process of the projectile, greater wear and erosion are caused to the inner wall and rifling of the barrel, thereby achieving the purpose of accelerating the wear and ablation in the barrel with fewer projectiles. The projectile structure of the present invention is used to perform a service life test on the inner cavity of the barrel, which not only effectively reduces the number of projectiles used and shortens the barrel test cycle, but also effectively saves projectile consumables and reduces the test cost. At the same time, shortening the barrel test cycle can ensure that the external factors of the entire test cycle do not change to the greatest extent, thereby avoiding the interference of the test results caused by the change of external environmental factors, ensuring the accuracy of the simulation test results, and avoiding error accumulation. The present invention ensures that each of the multiple belt structures can effectively wear the inner wall of the barrel under the limitation of the length of the projectile itself through a specific multiple belt structure, that is, each belt can achieve independent wear instead of running along the wear path of the previous belt, effectively increasing the wear amount of the inner wall of the barrel by a single projectile body, thereby achieving the purpose of accelerating the wear and degradation of the barrel. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a schematic diagram of the projectile structure of the present invention.
[0027] Figure 2 It is a test schematic diagram of the projectile structure of the present invention being squeezed into the barrel.
[0028] Among them: 1. Projectile body; 11. Initial belt; 12. Additional belt; 2. Test barrel. DETAILED DESCRIPTION
[0029] The specific implementation of the present invention is now described in conjunction with the drawings in the specification; it should be made clear that the sizes of the various parts in the schematic diagram are not drawn completely according to the actual proportional relationship, and any description should be regarded as exemplary rather than limiting.
[0030] Embodiment 1: A multi-segment belt projectile structure fired in series, comprising a projectile body 1, an outer wall of the projectile body 1 is provided with a multi-belt structure, the multi-belt structure comprises a plurality of belts in the opposite direction of the projectile body 1 (i.e. Figure 1 The initial elastic belt 11 and the multiple additional elastic belts 12 are arranged in sequence on the outer circle of the projectile body 1 (from left to right as shown in the figure), the number of the additional elastic belts 12 is 2 to 10 (preferably 5, 6 or 7), and the initial elastic belt 11 and the additional elastic belt 12 are coaxially arranged with the projectile body; the initial elastic belt 11, the additional elastic belt 12 and the projectile body 1 are made of the same material and the initial elastic belt 11, the additional elastic belt 12 and the projectile body 1 are integrally formed. The width of the initial elastic belt 11 is greater than the width of the additional elastic belt 12 and the sizes of the multiple additional elastic belts 12 are the same. The initial elastic belt 11 and the multiple additional elastic belts 12 are close to the side of the projectile body 1 on the side of the firing direction (i.e. Figure 1 The outer ring of the initial band 11 is set as a tapered inclined surface with a longitudinal section, the width w1 of the initial band 11 is 6 to 8 mm (preferably 7 mm), the angle of the inclined surface is 30 to 40 degrees (preferably 35 degrees), and the height h of the initial band 11 (that is, the distance between the outer wall of the initial band 11 and the outer wall of the projectile body 1) is 0.6 to 1.0 mm (preferably 0.8 mm). The distance between the tail of the initial band 11 and the front end of the projectile body 1 (that is, the striking end) is less than the distance between the center of mass of the projectile body 1 and the front end of the projectile body 1 (that is, the tail of the initial band 11 is located in front of the center of mass of the projectile body 1, as shown in FIG. Figure 1 As shown, the center of mass of the projectile body 1 is the black dot). The width w2 of the additional elastic belt 12 is 1 to 3 mm (preferably 2 mm), and the height and angle of the inclined surface of the additional elastic belt 12 are consistent with the initial elastic belt 11. The forced extrusion amount of the initial elastic belt 11 (such as Figure 2 As shown: the forced extrusion amount 2j = 2x belt height + projectile body diameter - barrel positive line diameter) is 0.2-0.5 mm (preferably 0.35 mm); the forced extrusion amount of the additional belt 12 is consistent with the forced extrusion amount of the initial belt 11).
[0031] A chip storage groove is provided between the initial elastic belt 11 and the additional elastic belt 12 closest to it (ie the initial elastic belt 11 ), and between a plurality of adjacent additional elastic belts 12 ; the distance between the bottom of the chip storage groove and the outer wall of the projectile body 1 is 0 to 0.03 mm (preferably 0.01 mm).
[0032] The distance between the initial elastic belt 11 and the additional elastic belt 12 closest to it (i.e. the initial elastic belt 11), and the distance between multiple additional elastic belts 12, i.e. the width d of the chip storage groove is vt Curve and v-l The curve is obtained, specifically: First, get the fixed frequency when multiple projectiles are fired continuously f (The projectile used here is a traditional single-belt projectile), and the time interval between two consecutive shots is obtained t :
[0033] Then, according to the corresponding vt Curve and v-l Curve, get the speed of the projectile launched at the corresponding moment v ; vt Curve and v-l The curve is obtained by pre-simulating shooting (the projectiles used in the simulated shooting are also traditional single-belt projectiles), specifically: According to the basic equation of interior ballistics, that is: Shape function:
[0034] Burning rate equation:
[0035] Projectile motion equation:
[0036] Projectile velocity and travel equation:
[0037] The basic equation of interior ballistics is:
[0038] Where: p Indicates the pressure in the chamber; S Indicates the cross-sectional area of the barrel; It indicates the reduced diameter length of the free volume of the chamber; It means the chamber volume is reduced in diameter; l Indicates the travel of the projectile; f It indicates the power of gunpowder; Indicates the charge amount; Z Indicates the relative thickness of the gunpowder that has burned; v Indicates the speed of the projectile; Indicates the percentage of gunpowder burned; m Indicates the mass of the projectile; represents the adiabatic coefficient; represents the secondary work coefficient; Indicates the density of gunpowder; Indicates the remaining amount of gunpowder; I k Indicates the total impulse of pressure; n Indicates the combustion index; , , Indicates the shape characteristic of gunpowder; The burning rate equation in the basic equation of internal ballistics is simplified so that the burning index n=1. At the same time, continuous and uninterrupted projectile shooting is performed to obtain the internal ballistic equation of each projectile: Among them, the first projectile:
[0039] Where: k represents the adiabatic index; It indicates the flow coefficient of the barrel mouth; Indicates the gas pressure at the barrel mouth; Indicates the gas density at the barrel mouth; L Indicates the barrel length; A.C represents a constant (obtained from actual test data); Burning rate equation:
[0040] Projectile velocity and travel equation:
[0041] Projectile motion equation:
[0042] Where: R x represents the compensation coefficient, ,in, The crowding coefficient, which represents the linear relationship, is obtained based on experimental data; l x represents the formation threshold of initial motion; Second round: Starting from the second round, the travel of each projectile in the barrel is changing, that is, the projectile travel l The trend of change is gradually increasing. At this time, the bullet motion equation has changed:
[0043]
[0044] Where: l d Indicates the length of a single projectile; The projectile travel of the third bullet increases by two projectile lengths, and the bullet motion equation changes. By analogy (i.e., the projectile travel of the fourth bullet increases by three projectile lengths, and the projectile travel of the fifth bullet increases by four projectile lengths), the projectile's length in the barrel is obtained. vt Curve and v-l Curve (where v-l The curve is a nonlinear continuous curve).
[0045] Finally, the width d is obtained by the time interval t and the speed v: .
[0046] Embodiment 2: As a preferred embodiment of the present invention, based on the scheme of Example 1, in order to facilitate the smooth squeezing of the projectile body 1 into the inner cavity of the test barrel 2 and avoid the violent friction between the squeezing end of the test projectile body 1 and the inner wall of the test barrel 2, thereby affecting the subsequent measurement of the friction loss of the test barrel 2, the test barrel 2 is located at the end of the squeezing end of the projectile body 1 (i.e. Figure 2 The inner wall of the right end portion (as shown in the figure) is arranged as a conical cavity with a diameter gradually decreasing from right to left, the conical cavity is arranged coaxially with the test barrel 2 and the maximum diameter of the conical cavity is consistent with the outer diameter of the initial ammunition belt 11, and the length of the conical cavity is not greater than the width of the initial ammunition belt 11.
Claims
1. A multi-stage belt projectile structure fired in series, characterized in that: The invention comprises a projectile body, wherein the outer wall of the projectile body is provided with a multi-belt structure, wherein the multi-belt structure comprises an initial belt and a plurality of additional belts which are sequentially arranged in the outer circle of the projectile body in the opposite direction of the firing of the projectile body, wherein the initial belt and the additional belts are coaxially arranged with the projectile body; the width of the initial belt is greater than the width of the additional belt and the sizes of the plurality of additional belts are consistent; the outer circles of the side surfaces of the initial belt and the plurality of additional belts close to the firing direction of the projectile body are both arranged as inclined surfaces with a conical longitudinal section; a chip storage groove is provided between the initial belt and the additional belt closest thereto and between the plurality of adjacent additional belts; the initial belt, the additional belt and the projectile body are all made of the same material.
2. A multi-stage belt projectile structure for serial firing according to claim 1, characterized in that: The number of the additional elastic belts is 2 to 10.
3. A multi-stage belt projectile structure for serial firing according to claim 1 or 2, characterized in that: The width of the initial elastic band is 6-8 mm, the angle of the inclined surface is 30-40°, and the height of the initial elastic band is 0.6-1.0 mm.
4. A multi-stage belt projectile structure for serial firing according to claim 2 or 3, characterized in that: The width of the additional elastic band is 1 to 3 mm, and the height and angle of the inclined surface of the additional elastic band are consistent with those of the initial elastic band.
5. A multi-stage belt projectile structure for serial firing according to claim 4, characterized in that: The distance between the bottom of the chip storage groove and the outer wall of the projectile body is 0 to 0.03 mm.
6. A tandem-fired multi-segment belt projectile structure according to claim 1, characterized in that: The distance between the initial elastic belt and the additional elastic belt closest to it, and between multiple additional elastic belts, that is, the width d of the chip storage groove is vt Curve and v-l The curve is obtained, specifically: First, get the fixed frequency when multiple projectiles are fired continuously f , and obtain the time interval between two consecutive shots t : Then, according to the corresponding vt Curve and v-l Curve, get the speed of the projectile launched at the corresponding moment v ; Finally, the width d is obtained by the time interval t and the speed v: 。 7. A tandem-fired multi-segment belt projectile structure according to claim 6, characterized in that: Said vt Curve and v-l The curve is obtained by pre-simulating shooting, specifically: According to the basic equation of interior ballistics, that is: Shape function: Burning rate equation: Projectile motion equation: Projectile velocity and travel equation: The basic equation of interior ballistics is: Where: p Indicates the pressure in the chamber; S Indicates the cross-sectional area of the barrel; It indicates the reduced diameter length of the free volume of the chamber; It means the chamber volume is reduced in diameter; l Indicates the travel of the projectile; f It indicates the power of gunpowder; Indicates the charge amount; Z Indicates the relative thickness of the gunpowder that has burned; v Indicates the speed of the projectile; Indicates the percentage of gunpowder burned; m Indicates the mass of the projectile; represents the adiabatic coefficient; represents the secondary work coefficient; Indicates the density of gunpowder; Indicates the remaining amount of gunpowder; I k Indicates the total impulse of pressure; n Indicates the combustion index; , , Indicates the shape characteristic of gunpowder; The burning rate equation in the basic equation of internal ballistics is simplified so that the burning index n=1. At the same time, continuous and uninterrupted projectile shooting is performed to obtain the internal ballistic equation of each projectile: Among them, the first projectile: Where: k represents the adiabatic index; It indicates the flow coefficient of the barrel mouth; Indicates the gas pressure at the barrel mouth; Indicates the gas density at the barrel mouth; L Indicates the barrel length; A.C represents a constant; Burning rate equation: Projectile velocity and travel equation: Projectile motion equation: Where: R x represents the compensation coefficient, ,in, The crowding coefficient, which represents the linear relationship, is obtained based on experimental data; l x represents the formation threshold of initial motion; Second round: Starting from the second round, the travel of each projectile in the barrel is changing, that is, the projectile travel l The trend of change is gradually increasing. At this time, the bullet motion equation has changed: Where: l d Indicates the length of a single projectile; The projectile travel of the third bullet increases by two projectile lengths, and the bullet motion equation changes. By analogy, the projectile's travel in the barrel is obtained. vt Curve and v-l curve.