Balance gun centering device and using method thereof

Abstract

The invention belongs to the field of weapon launching systems, and relates to a balance gun centering device and a using method thereof. The device comprises a front centering part, a projectile body and a rear centering part, a first through hole is formed in the front centering part; a blind hole is formed in the rear centering part; one end of the elastic body is connected with the blind hole, and the other end penetrates through the first through hole and extends out of the first through hole; one part of the second through hole is connected with the outer circumference of the front centering part through a reinforcing ring, and the other part of the second through hole is connected with the outer circumference of the front centering part through a reinforcing rib; second through holes are uniformly formed in the reinforcing ring; a groove is formed between the blind hole and the outer circumference of the rear centering part; and the mass of the front centering part is smaller than that of the rear centering part. The device has the advantages of being light in weight, high in bearing capacity, easy to machine and assemble and the like, and the safety and reliability of the balancing gun experiment centering structure can be improved.

Description

Technical Field

[0001] The invention belongs to the field of weapon launching systems, and relates to a centering device for a balanced gun and a using method thereof. Background Art

[0002] With the rapid development of hypersonic weapon technology, the research on the damage effectiveness, structural integrity, and aerodynamic heat protection of the warhead system has become the core issue in the current military equipment field. The research on damage effectiveness is not only the cornerstone of military technology progress but also the core support for realizing the "accurate, efficient, and controllable" modern war. As an important means to study the structural response of the warhead, the balanced gun experiment usually uses a sabot to launch a sub-caliber warhead. Centering in the balanced gun barrel not only plays a role in positioning and guiding the warhead but also drives the warhead to obtain a high speed. The rationality of the centering structure design directly affects the safety of the experiment and the accuracy of the data. Therefore, designing a centering structure for a balanced gun with high strength, light weight, rapid assembly and disassembly is of great significance for the research of hypersonic weapon equipment.

[0003] The existing centering technology has significant deficiencies in the experimental design and manufacturing of large-caliber balanced guns: when the launch caliber increases to the 600mm level and the launch speed reaches 1500m / s, the centering mass increases accordingly, the driving force provided by the explosive combustion and explosion is more violent, and the impact load borne by the centering also increases rapidly. Due to insufficient radial stiffness, the traditional homogeneous metal structure is prone to elastic or even plastic deformation during the acceleration process, resulting in uneven gaps between the outer peripheral surface of the centering part and the inner wall of the gun barrel, leading to warhead yaw or even jamming; and in order to meet the structural strength requirements in a high-overload environment, the existing centering still generally uses metal materials, resulting in an excessively large overall weight, which conflicts with the light-weight requirement. This not only limits the speed increase of the warhead but also increases the burden on the launch system and the experimental risk. In addition, the traditional centering realizes the fixation of each clamping lobe through a fastening ring and a dot riveting process, making installation and disassembly extremely difficult. Summary of the Invention

[0004] The purpose of the invention is to solve the problems in the prior art, and provide a centering device for a balanced gun and a using method thereof, which have the characteristics of light weight, high load-bearing capacity, easy processing, and easy assembly, and can improve the safety and reliability of the centering structure in the balanced gun experiment.

[0005] To achieve the above purpose, the invention adopts the following technical solutions: In a first aspect, the present invention provides a centering device for a balanced gun, comprising a front centering part, a projectile body, and a rear centering part; a first through hole is provided inside the front centering part; a blind hole is provided inside the rear centering part; one end of the projectile body is connected to the blind hole, and the other end penetrates through the first through hole and extends outside the first through hole; a part of a second through hole is connected to the outer circumference of the front centering part through a reinforcing ring, and another part is connected to the outer circumference of the front centering part through a reinforcing rib; second through holes are uniformly provided on the reinforcing ring; a groove is provided between the blind hole and the outer circumference of the rear centering part; the mass of the front centering part is less than the mass of the rear centering part.

[0006] Preferably, threads matching the projectile body are provided on the inner walls of the first through hole and the blind hole.

[0007] Preferably, the reinforcing rib and the outer circumference of the front centering part are connected through a reinforcing rib chamfer.

[0008] Preferably, first chamfers are symmetrically provided on both sides of the outer circumference of the front centering part.

[0009] Preferably, a first boss is provided on the inner wall of the first through hole; a second boss is provided on the inner wall of the blind hole.

[0010] Preferably, a fracture groove is provided on the inner wall of the first through hole.

[0011] Preferably, a second chamfer is provided on the side of the outer circumference of the rear centering part close to the front centering part.

[0012] Preferably, a first threaded hole is provided at one end of the rear centering part; the first threaded hole and the positioning hole on the baffle are connected in a one-to-one correspondence through threads.

[0013] Preferably, the diameter of the baffle is less than the diameter of the rear centering part; an annular cartridge belt is provided on the baffle, and the diameter of the annular cartridge belt is greater than the diameters of the front centering part and the rear centering part.

[0014] In a second aspect, the present invention provides a method for using a centering device for a balanced gun, comprising the following steps: Connect the rear end of the projectile body to the blind hole, and penetrate the front end of the projectile body through the first through hole and extend it outside the first through hole until the projectile body is closely fitted with the centering device; Place the centering device into the gun barrel, detonate the explosive in the gun barrel, the reaction product gas generated by the detonation of the explosive expands to push the projectile body to be launched, and after the projectile body impacts the target, the front centering part and the rear centering part are sequentially separated from the projectile body.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In the device of the present invention, the front centering part and the rear centering part adopt a split support, which can effectively reduce the deflection moment of the projectile in the bore and improve the axial consistency of in-bore launch; the front centering part adopts a ribbed structure design, which improves the structural strength and reliability of the front centering part; through the second through-hole provided in the front centering part and the groove provided in the rear centering part, the weight can be reduced while ensuring performance, and the overall efficiency is optimized. The device of the present invention has the characteristics of light weight, high load-bearing capacity, easy processing and easy assembly, etc., and can improve the safety and reliability of the centering structure of the balance gun experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of the overall structure of the centering device of the balance gun and the projectile of the present invention; Figure 2 It is a schematic diagram of the structure of the front centering part; Figure 3 It is Figure 2 the top view of Figure 4 It is Figure 3 the A-A sectional view of Figure 5 It is a schematic diagram of the structure of the rear centering part; Figure 6 It is Figure 5 the sectional view of Figure 7 It is a schematic diagram of the structure of the baffle; Figure 8 It is Figure 7 the sectional view of

[0018] Wherein: 1. Front centering part; 2. Projectile; 3. Rear centering part; 4. Baffle; 5. Reinforcing rib; 6. Reinforcing rib chamfer; 7. Second through-hole; 8. First chamfer; 9. First through-hole; 10. First boss; 11. Fracture groove; 12. Second boss; 13. Annular groove; 14. First threaded hole; 15. Second chamfer; 16. Positioning hole; 17. Blind hole; 18. Annular projectile belt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0022] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0023] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0024] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "connected" are understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The following further describes the present invention in detail with reference to the accompanying drawings: The first objective of the present invention is to provide a centering device for a balance gun, such asFigures 1 - 6 As shown in the figure, it includes a front centering part 1, a projectile body 2 and a rear centering part 3; a first through hole 9 is arranged inside the front centering part 1; a blind hole 17 is arranged inside the rear centering part 3; one end of the projectile body 2 is connected to the blind hole 17, and the other end penetrates through the first through hole 9 and extends outside the first through hole 9; a part of the second through hole 7 is connected to the outer circumference of the front centering part through a reinforcing ring, and the other part is connected to the outer circumference of the front centering part through a reinforcing rib 5; the second through holes 7 are evenly arranged on the reinforcing ring; a groove is arranged between the blind hole 17 and the outer circumference of the rear centering part, and the mass of the front centering part 1 is less than the mass of the rear centering part 3.

[0026] The present invention realizes the two-way fixation of the projectile body 2 through the first through hole 9 of the front centering part 1 and the blind hole 17 of the rear centering part 3. Among them, the front end of the projectile body 2 penetrates through the first through hole 9 and extends outside the first through hole 9, and the rear end is connected to the blind hole 17, ensuring the axial positioning accuracy during the launch process. The design of the reinforcing rib 5 can improve the structural strength of the front centering part 1 under strong impact loads, ensure the integrity of the front centering part 1 in the balance gun barrel, and ensure the stability of the projectile body 2 in the interior ballistics.

[0027] The front centering part 1 realizes a significant lightweight effect through the cavity structure formed by the second through holes 7 evenly distributed on the reinforcing ring and the reinforcing rib 5 and the outer circumference of the front centering part, and the overall mass is significantly reduced. By arranging a groove between the blind hole 17 and the outer circumference of the rear centering part 3, the mass of the rear centering part 3 is also reduced on the premise of ensuring the structural strength. The present invention effectively reduces the inertial resistance during the movement of the projectile body 2 by weight reduction while ensuring the structural stiffness, further improving the launch initial velocity; and, the design of the second through hole 7 can also effectively reduce the resistance in the external ballistics, enabling the projectile body 2 to obtain a higher velocity under the condition of the same charge amount. In addition, the mass of the front centering part 1 is less than the mass of the rear centering part 3, that is, the degree of lightweight of the rear centering part 3 is lower, because the rear centering part 3 needs to withstand the explosive impact and ensure that the detonation products of the launch explosive do not leak, and it is necessary to ensure its stiffness and realize lightweight as much as possible. The present invention forms a partition design of lightweight in the front and anti-impact in the rear, ensuring that the projectile body 2 maintains the correct position in the gun barrel during launch, ensuring stable flight, and smoothly separating the sabot after leaving the muzzle.

[0028] Threads matching the projectile body 2 are arranged on the inner walls of the first through hole 9 and the blind hole 17. This thread mainly plays a connecting role during the entire launch process, and realizes the radial pre-tightening function between the projectile body 2 and the front centering part 1 and the rear centering part 3 through this thread. And, the threaded connection greatly simplifies the installation and disassembly process of the projectile body 2, facilitating the operation.

[0029] Exemplarily, the threads on the inner wall of the first through hole 9 occupy half of the inner wall of the entire first through hole 9 and are in threaded engagement with the threads on the projectile body 2. When the projectile body 2 impacts the target target plate, the separation of the sabot can be smoothly achieved, reducing the impact on the external ballistic performance of the projectile body 2. The threads on the inner wall of the blind hole 17 also mainly play a connecting role during the entire launch process. When the projectile body impacts the target, the huge kinetic energy generated by it shears the threads on the inner wall of the blind hole 17, separating the rear centering part 3 from the projectile body 2.

[0030] The reinforcing rib 5 and the outer circumference of the front centering part are connected by a reinforcing rib chamfer 6. The reinforcing rib chamfer 6 can effectively disperse and transfer the stress concentration phenomenon, enabling the high stress that might originally be concentrated in a local area to be evenly released, thereby significantly reducing the generation of local high stress in the front centering part 1 and remarkably enhancing the overall load-bearing capacity and fatigue life of the component.

[0031] On both sides of the outer circumference of the front centering part, first chamfers 8 are symmetrically arranged, forming smooth transition slopes, enabling the front centering part 1 to more flexibly adjust its direction during installation, easily and accurately enter the balance gun, thus achieving rapid installation and improving the assembly efficiency.

[0032] On the inner wall of the first through hole 9, a first boss 10 is provided, and on the inner wall of the blind hole 17, a second boss 12 is provided. The bosses can facilitate the positioning of the installation positions of the front centering part 1 and the rear centering part 3 during the assembly process. At the same time, they have a certain load-bearing effect during the launch process, reducing the occurrence of unexpected situations where the front centering part 1 and the rear centering part 3 fall off prematurely during the interior ballistic phase. During operation, the first boss 10 and the second boss 12 cooperate with each other to guide the alignment of the components, facilitating the positioning of the projectile body 2, saving installation time, and optimizing the assembly process.

[0033] On the inner wall of the first through hole 9, a fracture groove 11 is provided, causing a huge stress concentration at the fracture groove 11 when the projectile body 2 impacts the target target plate, enabling the front centering part 1 to quickly fragment and separating the projectile body 2 from the front centering part 1 quickly without affecting the external ballistic attitude of the projectile body 2 itself.

[0034] On the side of the outer circumference of the rear centering part close to the front centering part 1, a second chamfer 15 is provided. By precisely calculating the chamfer angle and size, the rear centering part 3 can quickly and automatically adjust its direction when contacting the gun barrel, accurately slide into the balance gun, greatly shortening the installation time. At the same time, it significantly reduces the frictional resistance during assembly, making the entire assembly process smoother and more efficient.

[0035] One end of the rear centering part 3 is provided with a first threaded hole 14; as Figures 7 - 8As shown, the first threaded holes 14 and the positioning holes 16 on the baffle 4 are connected in a one-to-one correspondence by threads, which facilitates the installation and disassembly of the baffle 4. The baffle 4 can significantly block the backflow of the detonation reaction gas of the explosive for launching, assist the separation of the sabot from the projectile body 2, reduce the tail turbulence at the same time, and reduce its impact on the launch of the projectile body 2.

[0036] In addition, in the assembly process, the baffle 4 provides an absolutely reliable positioning reference for other components. Based on the position of the baffle 4, the staff can efficiently and accurately install each component to the designated position and control the position of the entire structure in the gun barrel. In the launch preparation stage, the explosive for launching is accurately placed at a predetermined position, and the baffle 4 is also used to isolate the explosive from the rear centering part 3, which not only eliminates the potential damage risk to the rear centering part 3 caused by the accidental detonation of the explosive or the leakage of high-temperature and high-pressure gas, but also ensures the normal functioning of each component during the launch process, laying a solid foundation for the safe and stable launch of the projectile body 2.

[0037] The diameter of the baffle 4 is smaller than the diameter of the rear centering part 3; an annular cartridge band 18 is provided on the baffle 4, and the diameter of the annular cartridge band 18 is larger than the diameters of the front centering part 1 and the rear centering part 3. The annular cartridge band 18 is made of nylon and can be nested on the baffle 4 under prestress. Since its diameter is larger than the diameters of the front centering part 1 and the rear centering part 3, it can effectively avoid the loss caused by the direct contact between the front centering part 1 and the rear centering part 3 and the gun barrel.

[0038] Exemplarily, to further improve the positioning accuracy and reliability of the centering device of the balanced gun of the present invention in a complex launch environment, two annular grooves 13 are evenly opened on the outer circumferential surface of the rear centering part. The width of the annular groove 13 is about 45 mm. At the same time, a protruding elastic buckle with a corresponding width is provided inside the gun barrel to cooperate with the annular groove 13 to position the rear centering part 3 in the gun barrel and prevent the rear centering part 3 from squeezing the explosive; in the initial stage of the launch of the projectile body 2, due to the application of an instantaneous impact load, the snap connection mechanism mechanically breaks and separates due to exceeding its structural strength limit, without affecting the launch trajectory of the projectile body 2.

[0039] In the present invention, both the front centering part 1 and the rear centering part 3 are made of high-strength alloy steel (such as 42CrMo or 30CrMnSiA) and are integrally formed by precision forging and numerically controlled machine tools. The introduction of the integrated processing technology completely eliminates the defects such as welding residual stress and assembly gap existing in the traditional welded or assembled centering structure. By completing all feature processing in one clamping, the cumulative positioning error caused by multiple clamps is avoided, and the position accuracy between the structural elements of the centering part reaches the micron level. In addition, the integrated structure significantly improves the overall stiffness of the device. Under the same load conditions, the deformation of the centering part of the present invention is reduced compared with the traditional structure, which can effectively suppress the radial offset and axial crosstalk during the launch of the projectile 2, and provides a stable launch environment for the projectile 2.

[0040] The centering device of the balanced gun of the present invention has extremely strong working condition adaptability, can stably support the launch requirements of large-caliber projectiles of 600 mm level, and achieve the ultra-high muzzle velocity launch index of 1500 m / s. In addition, according to the requirements of the actual application scenario, the present invention can adjust the radial dimension and axial thickness parameters of the centering part, optimize the pitch of the threaded connection structure, and upgrade the material heat treatment process to improve the yield strength and toughness matching degree of the alloy steel, so as to adapt to the launch requirements of larger-caliber projectiles and extreme launch conditions of higher speeds.

[0041] Exemplarily, increasing the radial dimension of the centering part can enhance its inclusiveness for large-caliber projectiles, and adjusting the axial thickness can balance the structural stiffness and weight; optimizing the threaded connection structure can improve the matching accuracy and shear resistance between the projectile 2 and the centering part; and the upgrade of the material heat treatment process can ensure that the centering part still has sufficient strength reserve and fatigue resistance at higher launch speeds.

[0042] The second object of the present invention is to provide a method for using a centering device of a balanced gun, including the following steps: Threadedly connect and fix the rear end of the projectile 2 and the thread on the inner wall of the blind hole 17; the front end of the projectile 2 penetrates through the first through hole 9 and extends outside the first through hole 9, and the part of the projectile 2 penetrating through the first through hole 9 is threadedly connected and fixed with the thread on the inner wall of the first through hole 9 to realize the tight fit between the projectile 2 and the centering device.

[0043] Place the centering device and the fixed projectile 2 into the gun barrel, and use the elastic buckle and the annular groove 13 preset on the outer circumference of the rear centering part to fix the centering device in the gun barrel. Detonate the explosive in the gun barrel, and the reaction product gas generated by the detonation of the explosive expands to push the projectile 2 to launch. After the projectile 2 impacts the target, stress concentration occurs at the fracture groove 11, causing the front centering part 1 to quickly break, and at the same time, the huge kinetic energy generated by it shears the thread on the inner wall of the blind hole 17 of the rear centering part 3, so that the front centering part 1 and the rear centering part 3 are separated from the projectile 2 in sequence.

[0044] The present invention achieves a stable assembly through the double-threaded connection structure between the projectile 2 and the centering device, and combines the barrel fixing mechanism of the elastic buckle and the annular groove 13 to ensure the reliability of the overall structure before launch. During launch, the stress concentration design of the fracture groove 11 is used to achieve the rapid fragmentation of the front centering part 1. At the same time, the thread of the shear blind hole 17 is used to complete the instantaneous separation of the projectile 2 and the rear centering part 3. This not only avoids the disassembly delay caused by severe impact in the traditional structure, but also ensures the timeliness of the separation of the projectile 2 through precise kinetic energy distribution control, effectively improving the launch accuracy and safety of the weapon system, and realizing the coordinated optimization of the centering function and the separation function of the projectile 2.

[0045] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A centering device for a balanced gun, characterized in that: The invention comprises a front centering part (1), a body (2) and a rear centering part (3); a first through hole (9) is arranged inside the front centering part (1); a blind hole (17) is arranged inside the rear centering part (3); one end of the body (2) is connected to the blind hole (17), and the other end passes through the first through hole (9) and extends to the outside of the first through hole (9); a part of the second through hole (7) is connected to the outer circumference of the front centering part through a reinforcing ring, and the other part is connected to the outer circumference of the front centering part through a reinforcing rib (5); the second through holes (7) are evenly arranged on the reinforcing ring; a groove is arranged between the blind hole (17) and the outer circumference of the rear centering part; the mass of the front centering part (1) is less than the mass of the rear centering part (3).

2. A centering device for a balanced gun according to claim 1, characterized in that: The inner wall of the first through hole (9) and the inner wall of the blind hole (17) are both provided with threads matching the elastic body (2).

3. A centering device for a balanced gun according to claim 1, characterized in that: The reinforcing rib (5) and the outer circumference of the front centering portion are connected via a reinforcing rib chamfer (6).

4. A centering device for a balanced gun according to claim 1, characterized in that: First chamfers (8) are symmetrically arranged on both sides of the outer circumference of the front centering portion.

5. A centering device for a balanced gun according to claim 1, characterized in that: A first boss (10) is provided on the inner wall of the first through hole (9); and a second boss (12) is provided on the inner wall of the blind hole (17).

6. A centering device for a balanced gun according to claim 1, characterized in that: A fracture groove (11) is provided on the inner wall of the first through hole (9).

7. A centering device for a balanced gun according to claim 1, characterized in that: A second chamfer (15) is provided on one side of the outer circumference of the rear centering portion close to the front centering portion (1).

8. A centering device for a balanced gun according to claim 1, characterized in that: A first threaded hole (14) is provided at one end of the rear centering portion (3); the first threaded hole (14) and the positioning hole (16) on the baffle (4) are connected in a one-to-one correspondence via threads.

9. A centering device for a balanced gun according to claim 8, characterized in that: The diameter of the baffle plate (4) is smaller than the diameter of the rear centering portion (3); an annular elastic band (18) is provided on the baffle plate (4), and the diameter of the annular elastic band (18) is larger than the diameters of the front centering portion (1) and the rear centering portion (3).

10. A method for using a centering device for a balanced gun according to any one of claims 1 to 9, characterized in that: The following steps are involved: Connecting the rear end of the elastic body (2) to the blind hole (17), and passing the front end of the elastic body (2) through the first through hole (9) and extending to the outside of the first through hole (9) until the elastic body (2) is tightly fitted with the centering device; The centering device is placed in the barrel of a gun, and the explosive in the barrel is detonated. The reaction product gas generated by the detonation of the explosive expands and pushes the projectile (2) to be launched. After the projectile (2) hits the target, the front centering part (1) and the rear centering part (3) are separated from the projectile (2) in sequence.

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