Perforated module structure for tonnage charging of large-caliber balance gun and design method of perforated module structure

Abstract

The invention discloses a pored module structure for tonnage charging of a large-caliber balance gun and a design method of the pored module structure, and mainly solves the problem that the internal pressure of a barrel cannot be directly and accurately detected due to the fact that an existing charging module shields a barrel pressure measuring hole in the launching process. The structure comprises a barrel cover, an upper inner hoop, a barrel body, a lower inner hoop, a bottom plate and reinforcing ribs. A plurality of pressure guide holes are additionally formed in the wall surface of the barrel body, and when the charging module moves to the position corresponding to the pressure measuring hole of the barrel body, the pressure guide holes can establish a pressure conduction channel, so that the shielding effect of the wall surface of the module on the pressure measuring hole is eliminated, and the barrel body sensor can directly detect the gas pressure in the barrel body without lag. Meanwhile, the reinforcing ribs arranged on the inner wall of the barrel body make up for strength weakening caused by hole opening, and it is ensured that the structure meets the mechanical requirement under the launching working condition.

Description

Technical Field

[0001] This invention belongs to the field of internal ballistic module propellant design, specifically relating to a perforated module structure and its design method for ton-class propellant charges in large-caliber balanced guns. In particular, the propellant module must ensure structural strength and not interfere with the pressure measuring holes. Background Technology

[0002] Large-caliber balanced guns are experimental devices used for ground acceleration of large-caliber warheads. Modular propellant loading technology, with its convenient loading, high safety, and adjustable propellant charge, is widely used in large-caliber balanced guns. Traditionally, the propellant module container has an intact wall, filled with propellant to form an independent propellant unit. During firing, the entire propellant module is placed in the barrel chamber, where the propellant is ignited by an ignition system to generate high-temperature, high-pressure gas, propelling the projectile and counterweight along the barrel.

[0003] However, this traditional structure has significant drawbacks in practical applications. During the movement of the propellant module, its intact wall surface obstructs the pre-set pressure measurement holes on the barrel wall, preventing the pressure sensor from directly and continuously detecting the actual pressure inside the barrel. This results in severe deviations or signal lag in the measurement data. This problem greatly affects the accuracy of internal ballistic characteristic analysis and the reliability of launch safety assessment.

[0004] In their paper, "Experimental and Numerical Simulation of In-Burn Flow Field Characteristics of Single-Module Charge," Ma Tianyi et al. visually revealed the physical mechanism of the aforementioned shielding effect using a modular charge combustion simulation test platform. The charge module used in this study consisted of a combustible cartridge (containing a modular cartridge and end caps), granular propellant, a ignition tube, and a serpentine propellant bag. Experimental results showed that in the initial stage before module rupture, due to the physical barrier of the intact cartridge wall, the high-pressure gas generated by the combustion of the main charge was trapped inside the module and could not diffuse into the free space of the chamber in a timely manner. This resulted in the pressure signal at the pressure measurement hole on the chamber wall showing almost no change in the initial stage, a stark contrast to the high-pressure environment inside the module.

[0005] Therefore, the existing full-walled charge module structure, due to its inherent obstruction characteristics, can no longer meet the urgent need for high-precision, real-time pressure measurement of ton-class charge charges in large-caliber balanced guns. Summary of the Invention

[0006] To address the problem that the internal pressure of existing propellant modules cannot be directly detected through the barrel pressure measurement port due to their fully sealed wall design, this invention aims to provide a perforated module structure and its design method for ton-class propellant charges in large-caliber balanced guns. Through structural design, while ensuring structural strength meets firing requirements, the barrel pressure measurement port accurately captures the actual internal pressure data of the propellant module during its movement. This provides reliable data support for weapon firing performance evaluation and safety assurance, fundamentally solving the problem of pressure detection obstruction and interference from the propellant module.

[0007] The technical solution for realizing the present invention is as follows: a perforated module structure for a ton-class propellant charge of a large-caliber balanced gun, comprising an upper inner hoop, a barrel cover, a barrel body, a bottom plate, and a lower inner hoop arranged from top to bottom. The barrel body is a cylindrical shape with openings at both ends. Multiple pressure guiding holes are added to the wall surface of the barrel body, and multiple sets of reinforcing ribs are added to the inner wall of the barrel body. The upper inner hoop and the barrel cover are fitted onto the inner wall of the upper end of the barrel body, and the lower inner hoop and the bottom plate are fitted onto the inner wall of the lower end of the barrel body. The upper inner hoop and the lower inner hoop provide support for the barrel body.

[0008] A design method for a perforated modular structure for ton-class propellant charges in large-caliber balanced guns, comprising the following steps:

[0009] Step 1: Determine the outer diameter of the barrel based on the experimental performance of the loading module. Barrel height Barrel thickness The number of pressure guiding holes is The diameters of the lid and the bottom plate are both ,high Number of guide holes The outer diameters of the upper inner hoop and the lower inner hoop ,thickness ,high Proceed to step 2.

[0010] Step 2: Determine the radius of the circular head of the pressure guide hole. Length of pressure guide hole The width of the strip-shaped tail Proceed to step 3.

[0011] Step 3: Determine the distance between the pressure guide hole and the end face of the barrel. Array spacing The spacing between the two pressure guide holes in each group Proceed to step 4.

[0012] Step 4: Determine the height of the reinforcing ribs Width of reinforcing rib Thickness of reinforcing ribs .

[0013] Compared with the prior art, the significant advantages of this invention are:

[0014] (1) By opening pressure guiding holes on the barrel wall, a pressure transmission channel is directly established between the charging module and the pressure measuring hole of the barrel, which solves the problem that the traditional charging module cannot detect the internal pressure due to the wall blockage.

[0015] (2) The distribution of "racket-shaped" openings with adjacent unit heads facing alternately achieves a compact layout in the vertical space, which increases the flow area for pressure transmission and disperses the structural stress, effectively avoiding local stress concentration. The connection between the circular head and the strip-shaped tail of the pressure guide hole adopts a smooth arc transition, which reduces the local resistance and eddies of gas flow, making the pressure transmission more stable, and improving the structural reliability of the barrel under high pressure environment.

[0016] (3) The design of “pressure guide hole + reinforcing rib” is adopted. A reinforcing rib is added to the inner wall of the barrel at the corresponding position of the pressure guide hole. This not only makes up for the weakening of the barrel strength by the opening, but also avoids interference with the pressure guide hole, ensuring the overall structural integrity and load-bearing capacity of the module under the action of high pressure gas.

[0017] (4) The upper and lower inner hoops are positioned based on diagonal wire holes, and combined with high-temperature resistant structural adhesive for constant temperature curing, forming an integrated "positioning-curing" fixing process. This scheme can ensure that the upper and lower inner hoops are strictly aligned with the barrel body and the end faces are flush during the assembly stage; after curing, a permanent rigid connection is formed, thereby significantly improving the integrity and load-bearing performance of the end structure.

[0018] (5) The barrel lid and the bottom plate are provided with multiple circular gas guide holes, which can accurately guide the gunpowder gas to the preset direction, optimize the gas work efficiency, and avoid local airflow turbulence affecting the stability of the projectile movement; at the same time, the inner side of the barrel lid and the bottom plate is covered with an integrated ablation-resistant sealing layer, which ensures full-sealing protection during storage, transportation and standby, and can burn completely without residue when launched, taking into account both sealing performance and launch function requirements. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of a perforated module structure for a large-caliber balanced gun with a ton-class propellant charge.

[0020] Figure 2 This is a schematic diagram showing the structural parameters of the perforated charge module.

[0021] Figure 3 A schematic diagram showing the structural parameters of the pressure guiding hole.

[0022] Figure 4 This is a schematic diagram illustrating the structural parameters of the reinforcing ribs. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0025] In the present invention description, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

[0026] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; "connection" can mean a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible to those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0028] The following section will further introduce the specific implementation method, as well as the technical difficulties and inventive points of this invention, using examples from this design.

[0029] Combination Figures 1-4 A perforated modular structure for ton-class explosive charges in a large-caliber balanced gun includes, from top to bottom, an upper inner hoop 1, a barrel cover 2, a barrel body 3, a bottom plate 4, and a lower inner hoop 5. Pressure guiding holes are added to the wall of the barrel body 3, and multiple sets of reinforcing ribs 6 are added inside the barrel body 3. The upper inner hoop 1 and the barrel cover 2 are fitted onto the upper inner wall of the barrel body 3, and the lower inner hoop 5 and the bottom plate 4 are fitted onto the lower inner wall of the barrel body 3. The upper inner hoop 1 and the lower inner hoop 5 provide support for the barrel body 3.

[0030] The upper inner hoop 1 and the lower inner hoop 5 are annular reinforcement components. Their assembly and fixing adopt an integrated solution of diagonal wire-threaded hole positioning and high-temperature resistant bonding. During positioning, wire threads are inserted through the diagonal wire-threaded holes to adjust the position of the upper inner hoop 1 and the lower inner hoop 5 inside the barrel 3, ensuring that the axes of the upper inner hoop 1 and the lower inner hoop 5 are coaxial with the axis of the barrel 3, and the end faces are flush with the end faces of the barrel 3. After positioning, high-temperature resistant structural adhesive is evenly applied to the bonding surface and cured at a constant temperature of 50-70℃ for 24-36 hours to form a permanent rigid connection, which greatly improves the integrity and load-bearing capacity of the end structure.

[0031] The lid 2 and the bottom plate 4 have openings. A circular gas flow guide hole, One circular guide hole is located at the central axis position, and the rest... A series of circular guide holes are evenly distributed around the central axis to precisely guide the propellant gas in a preset direction after ignition, optimizing the gas's work efficiency and preventing local airflow turbulence from affecting the stability of the projectile's motion. To ensure the module's airtightness during storage, transportation, and standby, the inner sides of the barrel lid 2 and the bottom plate 4 are covered with an integrated ablation-resistant sealing layer. This sealing layer is made of coarse cotton cloth impregnated with paraffin wax and is bonded and fixed by a hot-pressing process, completely covering the inner surfaces of the barrel lid 2, the bottom plate 4, and the gas guide holes to ensure full-sealing protection. This sealing layer can burn completely without residue during launch. The barrel lid 2 and the bottom plate 4 are respectively bonded and fixed to the corresponding upper and lower inner hoops with high-temperature resistant structural adhesive.

[0032] The barrel 3 is a cylindrical structure with openings at both ends. Pressure guiding holes are opened on the wall of the barrel 3 so that the pressure measuring holes on the body tube can detect the internal pressure of the body tube through the pressure guiding holes during the movement of the module.

[0033] The pressure guiding holes on the wall of the barrel 3 are "racket-shaped," with two holes forming a group. The two holes in the same group face alternately to maximize the area of ​​the pressure guiding hole region, thereby improving the pressure measurement efficiency. The connection between the circular head and the strip-shaped tail of each pressure guiding hole adopts a smooth arc transition to reduce local resistance and eddies when the gas flows through the channel, making the pressure transmission more stable and rapid, while reducing stress concentration and improving the structural reliability of the barrel 3 under high pressure. The pressure guiding holes are arrayed along the central axis of the barrel 3. Groups, forming a total of One pressure guide hole Multiple sets of "racket-shaped" pressure guide holes are arranged in a vertical row, with the heads of adjacent units facing alternately. This arrangement can achieve a compact layout in the vertical space, while dispersing the structural stress and avoiding local stress concentration.

[0034] To ensure the structural strength of the barrel body 3 wall, reinforcing ribs 6 are added to the inner wall of the barrel body 3 at the pressure measuring hole location. This ensures the strength of the barrel body 3 without interfering with the pressure measuring hole; the number of sets of reinforcing ribs 6 is [number missing]. Each group contains two reinforcing ribs 6; the height direction of the two reinforcing ribs 6 is parallel to the central axis of the loading module, and their width direction is arranged to fit the barrel body 3. The two reinforcing ribs 6 in the same group are respectively located at the vertical center line of the two circular holes of the pressure guiding hole in a group. The reinforcing ribs 6 are bonded to the barrel body 3 by solid structural adhesive.

[0035] The design method of the perforated module for ton-class propellant charges of large-caliber balanced guns described in this invention includes the following specific steps:

[0036] Step 1: Determine the outer diameter of barrel 3 based on the experimental performance of the loading module. 3. Bucket height 3mm thickness of barrel body Number of pressure guiding holes The diameter of the bucket lid 2 and the bottom plate 4 ,high Number of guide holes The outer diameters of the upper inner hoop 1 and the lower inner hoop 5 ,thickness ,high ;

[0037] Step 2: Determine the radius of the circular head of the pressure guide hole. Length of pressure guide hole The width of the strip-shaped tail ,

[0038] ,

[0039] ,

[0040] ;

[0041] Step 3: Determine the distance between the pressure guide hole and the end face of the barrel. Array spacing The spacing between the two pressure guide holes in each group ,

[0042] ,

[0043] ;

[0044] Step 4: Determine the height of reinforcing rib 6 The width of reinforcing rib 6 The thickness of reinforcing rib 6 ,

[0045] ,

[0046] ,

[0047] .

[0048] During the test, the propellant module was installed into the barrel, and the "racket-shaped" pressure guide hole of the barrel 3 was aligned with the pressure measuring hole of the barrel through the positioning mark of the barrel. After ignition, the gas generated by the combustion of the propellant filled the barrel through the guide holes on the barrel cover 2 and the bottom plate 4. The pressure measuring hole on the barrel monitored the pressure at each position in real time. Even if the position of the propellant module coincided with the position of the pressure measuring hole, the pressure measuring hole of the barrel could still obtain the internal pressure data in real time through the "racket-shaped" pressure guide hole.

[0049] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Obviously, any person skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of the present invention and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A perforated module structure for ton-class propellant charges in large-caliber balanced guns, comprising an upper inner hoop (1), a barrel cover (2), a barrel body (3), a bottom plate (4), and a lower inner hoop (5) arranged from top to bottom, wherein the barrel body (3) is a cylindrical shape with openings at both ends, characterized in that: Multiple pressure guide holes are added to the wall of the barrel (3), and multiple sets of reinforcing ribs (6) are added to the inner wall of the barrel (3). The upper inner hoop (1) and the barrel cover (2) are fitted onto the upper inner wall of the barrel (3), and the lower inner hoop (5) and the bottom plate (4) are fitted onto the lower inner wall of the barrel (3). The upper inner hoop (1) and the lower inner hoop (5) support the barrel (3).

2. The perforated module structure for ton-class propellant charges of large-caliber balanced guns according to claim 1, characterized in that: The upper inner hoop (1) and the lower inner hoop (5) are ring-shaped reinforcement parts. They are initially positioned by diagonal wire holes to ensure that they are coaxial with the barrel body (3) and flush with the end face. They are then bonded with high-temperature resistant structural adhesive and cured at a constant temperature of 50-70℃ for 24-36 hours to achieve reliable fixation.

3. The perforated module structure for ton-class propellant charges of large-caliber balanced guns according to claim 2, characterized in that: Both the lid (2) and the bottom plate (4) are provided with A circular gas flow guide hole, One circular guide hole is located at the central axis position, and the rest... A circular guide hole is evenly distributed around the central axis; the inner surface of the lid (2) and the bottom plate (4) is covered with an integrated ablation-resistant sealing layer, which is made of coarse cotton cloth substrate impregnated with paraffin; the lid (2) and the bottom plate (4) are respectively bonded and fixed to the corresponding upper inner hoop (1) and lower inner hoop (5) by high temperature resistant structural adhesive.

4. The perforated module structure for ton-class propellant charges of large-caliber balanced guns according to claim 3, characterized in that: The pressure guide holes on the wall of the barrel (3) are "racket-shaped", and the connection between the circular head and the strip-shaped tail of each pressure guide hole is a smooth arc transition; two pressure guide holes form a group, and the two pressure guide holes in the same group face alternately; they are arrayed along the central axis of the barrel (3). Groups, forming a total of One pressure guide hole .

5. The perforated module structure for ton-class propellant charges of large-caliber balanced guns according to claim 4, characterized in that: The number of sets of reinforcing ribs (6) is Each group contains two reinforcing ribs (6). The height direction of the reinforcing ribs (6) is parallel to the central axis of the loading module, and its width direction is aligned with the barrel body (3). The two reinforcing ribs (6) in the same group are located at the vertical center line of the two circular holes of the pressure guide hole in a group. The reinforcing ribs (6) are bonded to the barrel body (3) with solid structural adhesive.

6. A design method for a perforated module structure for a ton-class propellant charge of a large-caliber balanced gun, as described in any one of claims 1 to 5, characterized in that, The steps are as follows: Step 1: Determine the outer diameter of the barrel (3) based on the experimental performance of the charging module. , Bucket body (3) height Thickness of barrel (3) The number of pressure guiding holes is The diameters of the lid (2) and the base plate (4) are both ,high Number of guide holes The outer diameters of the upper inner hoop (1) and the lower inner hoop (5) ,thickness ,high Proceed to step 2; Step 2: Determine the radius of the circular head of the pressure guide hole. Length of pressure guide hole The width of the strip-shaped tail Proceed to step 3; Step 3: Determine the distance between the pressure guide hole and the end face of the barrel (3). Array spacing The spacing between the two pressure guide holes in each group Proceed to step 4; Step 4: Determine the height of the reinforcing rib (6) Width of reinforcing rib (6) Thickness of reinforcing rib (6) .

7. The design method of the perforated module structure for ton-class propellant charges of large-caliber balanced guns according to claim 6, characterized in that, In step 2, determine the radius of the circular head of the pressure guide hole. Length of pressure guide hole The width of the strip-shaped tail The details are as follows: ， ， 。 8. The design method of the perforated module structure for ton-class propellant charges of large-caliber balanced guns according to claim 6, characterized in that, In step 3, the distance between the pressure guide hole and the end face of the barrel (3) is determined. Spacing of pressure guiding holes The details are as follows: Distance between the pressure guide hole and the end face of the barrel (3) Spacing of pressure guiding holes Satisfy the following formula: 。 9. The design method of the perforated module structure for ton-class propellant charges of large-caliber balanced guns according to claim 6, characterized in that, In step 4, the height of the reinforcing rib (6) is determined. Width of reinforcing rib (6) Thickness of reinforcing rib (6) The details are as follows: ， 。

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