Whole-block throwing type launching box end cover compatible with radome bursting and shock wave bursting and missile launching box

Abstract

The invention relates to a whole-block throwing type launch box end cover compatible with radome bursting and shock wave bursting and a missile launch box, the whole-block throwing type launch box end cover comprises a cover body (1), the inner surface of the cover body (1) is provided with an impact-resistant functional layer (2), and the impact-resistant functional layer (2) is formed by compounding a resin matrix and a reinforcing material. Compared with the prior art, the missile launching box adopting the whole block throwing type launching box end cover can adapt to two launching working conditions of radome bursting and shock wave bursting, and in the missile launching process, the end cover can be reliably thrown out in a whole block mode. In conclusion, the whole launch box end cover can be thrown out, the phenomenon of flying with a cap caused by penetrating is avoided, the compatibility of bursting and bursting working conditions is achieved, operation is easy, cost is low, the high reliability of the end cover is achieved, and the task success probability is improved.

Description

Technical Field

[0001] This invention relates to the field of missile launch safety technology, specifically to a single-piece ejection launch box end cap and missile launch box that is compatible with both radome bursting and shock wave bursting. Background Technology

[0002] Rapid launch capability is one of the core performance indicators of modern missile weapon systems and an important development trend. Currently, most missile models in my country have widely adopted launch canister (tube) technology. Compared with the traditional bare missile launch mode, this technology can significantly improve the missile's anti-jamming capability, storage environment adaptability, and launch hit probability, and has become the mainstream configuration of missile launch systems.

[0003] As a key component of the launch system, the launch canister end cap performs a dual critical function: during storage, the end cap must ensure the airtight isolation of the launch canister, effectively preventing external environmental factors such as humidity, dust, and corrosive media from eroding the missile, thus ensuring the reliability of missile storage and extending its service life; during launch, the end cap must quickly and reliably clear the flight path, ensuring the missile launches smoothly without any interference. Therefore, the operational reliability of the end cap directly affects the overall combat effectiveness of the missile launch system.

[0004] However, in actual launch conditions, the same launch system may randomly switch between two different end cap opening modes: one is the "radome rupture mode," where the missile's nose radome directly impacts and ruptures the end cap, with the force primarily consisting of concentrated impact force; the other is the "shock wave (or gas flow) burst mode," where the shock wave (or gas flow) generated by the missile engine during launch acts on the end cap, causing it to burst under uniform gas pressure load. Because these two opening modes have significantly different force characteristics and load forms, traditional end cap designs often only accommodate a single opening mode, making it difficult to simultaneously meet the reliability requirements of both conditions. Furthermore, the fragments generated by the end cap breaking during bursting or rupture may interfere with missile flight and are prone to penetration, leading to "capped flight" phenomena, which severely impacts the overall reliability of the launch system. Summary of the Invention

[0005] The purpose of this invention is to provide a single-piece ejectable launch box end cap and missile launch box that are compatible with both radome rupture and shock wave rupture. The end cap can be adapted to both radome rupture and shock wave (or gas flow) rupture conditions and can reliably eject the end cap as a single piece.

[0006] The objective of this invention can be achieved through the following technical solutions: A single-piece ejector box end cap compatible with radome bursting and shock wave bursting, characterized in that it includes a cover body, the inner surface of which is provided with an impact-resistant functional layer, the impact-resistant functional layer being composed of a resin matrix and a reinforcing material.

[0007] Preferably, the cover body is any one of the following: a fiberglass structure, a sandwich composite structure with foam as the core layer and fiberglass as the panel layer, or a multi-layer composite structure with fiberglass as the matrix, foam as the core, and structural support material as the reinforcing skeleton.

[0008] Preferably, the structural support material includes wooden strips or stainless steel pipes.

[0009] Preferably, the resin matrix is ​​any one or more of epoxy resin, phenolic resin, polyurethane, and polyester resin.

[0010] Preferably, the reinforcing material is any one or more of carbon fiber and fabric, glass fiber and fabric, aramid fiber and fabric, and ultra-high molecular weight polyethylene fiber and fabric.

[0011] More preferably, the method for preparing the impact-resistant functional layer is as follows: the reinforcing material is laid up, and the reinforcing material of each layer is impregnated and bonded through the resin matrix, and then molded.

[0012] Preferably, the molding method of the impact-resistant functional layer is any one or more of hand lay-up molding, press hot pressing molding, autoclave molding, mold molding, and vacuum-assisted molding.

[0013] More preferably, the impact-resistant functional layer is designed according to actual working conditions.

[0014] Preferably, the impact-resistant functional layer is further provided with an auxiliary functional layer and a three-proof coating on the side surface away from the cover body.

[0015] Preferably, an auxiliary functional layer and a three-proof coating are sequentially provided on the outer surface of the cover body.

[0016] Preferably, the auxiliary functional layer is any one or more of an electromagnetic shielding coating, a sealing coating, or an ablation-resistant coating.

[0017] Preferably, the auxiliary functional layer is prepared by any one of thermal spraying, air spraying, or brushing processes.

[0018] Preferably, the conformal coating is prepared from conformal paint through any one of the following processes: thermal spraying, air spraying, or brushing.

[0019] More preferably, the construction process of the auxiliary functional layer and the three-proof coating is determined according to the coating system.

[0020] Preferably, the impact-resistant functional layer and the cover body are integrally molded, or they are molded separately and then connected by mechanical assembly or bonding.

[0021] Furthermore, the end cap may be circular, square, or other shapes.

[0022] Furthermore, the end cap is a flat plate or has a certain height in the height direction.

[0023] More preferably, the end cap is a circular flat end cap, a circular 100mm high-end cap, a square flat end cap, or a square 100mm high-end cap.

[0024] More preferably, the end cap meets the requirements of the launch box system, including pressure resistance, opening performance, and environmental adaptability.

[0025] The present invention also provides a missile launch box, wherein the end cover of the missile launch box adopts the above-mentioned one-piece ejection type launch box end cover, and the missile launch box can be used for two launch conditions: radome bursting and shock wave bursting, and the end cover is ejected as a whole during missile launch.

[0026] "Integral ejection" has become the preferred technical direction for end cap design. This means that the end cap detaches from the launch box as a complete unit when opened. This not only effectively avoids secondary interference to missile launch caused by fragments from traditional fragmented end caps, but also avoids the phenomenon of "flight with the cap on" caused by partial penetration. At the same time, it can improve the stability and controllability of the opening process. However, no existing technology has yet been found that can achieve integral ejection and is compatible with both radome rupture and shock wave (or gas flow) burst modes.

[0027] To address the limitations of existing launch canister end covers in simultaneously handling both radome breaching and shock wave bursting conditions, which can lead to opening failures, debris interference, and missile launch with the radome still attached, this invention provides a single-piece ejectible launch canister end cover and missile launch canister that combines adaptability to different operating conditions with structural reliability. This invention achieves dual-condition adaptability by incorporating an impact-resistant functional layer on the surface of the end cover body. This layer's excellent resistance to concentrated impacts and pressure stability enables the following dual-condition adaptation: When the radome breaching condition is triggered, the impact-resistant functional layer disperses the concentrated impact force of the missile's nose, preventing localized damage at the contact point and ensuring the cover detaches from the launch canister intact without damaging the radome structure. When the shock wave bursting condition is triggered, this functional layer can withstand uniform air pressure loads, ensuring the end cover is ejected quickly and orderly as a single piece, preventing fragmentation and interference. Through the above design, the present invention effectively solves the technical limitations of traditional end caps adapting to a single working condition. By using this single-piece ejection launch box end cap for the missile launch box, reliable opening under two launch conditions is achieved, which not only ensures the smoothness of the missile launch process, but also avoids adverse effects on the performance of the weapon system, and significantly improves the success reliability of missile launch missions.

[0028] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention provides a single-piece ejection box end cap that is compatible with both radome rupture and shock wave burst. The inner surface of the end cap body is provided with an impact-resistant functional layer. Based on the impact-resistant functional layer, the present invention can simultaneously adapt to both radome rupture and shock wave (or gas flow) burst conditions, and can reliably eject the end cap as a single piece.

[0029] (2) In this invention, the impact-resistant functional layer is made of resin-based / reinforced composite material, which has excellent resistance to concentrated impact. When the end cover is facing the radome breaking condition, even if it is subjected to a concentrated impact force of 8500N, it can still ensure that the end cover is thrown out intact and without being punctured and thus the phenomenon of "flying with the cap on" will not occur. Moreover, the missile radome remains intact, effectively avoiding the adverse effects of radome damage on the combat performance of the weapon system.

[0030] (3) The launch box end cover of the present invention has excellent uniform gas pressure load tolerance. When it is adapted to the shock wave (or gas flow) bursting condition, the impact-resistant functional layer can stably withstand the uniform load brought by the high temperature and high pressure gas flow or shock wave, promote the end cover to respond quickly and orderly realize the whole piece to be thrown out, and ensure that the missile launch channel is unobstructed.

[0031] (4) The opening pressure required to open the end cover of the integral ejection box of the present invention is basically the same whether the impact-resistant functional layer is provided or not, without the need to adjust the preset power parameters of the launch system, thus ensuring good compatibility between the end cover and the existing launch system.

[0032] (5) Based on the impact-resistant functional layer, the present invention further adds an auxiliary functional layer and a three-proof coating to form a multi-layer synergistic protection structure: the auxiliary functional layer can flexibly select electromagnetic shielding coating, sealing coating or ablation-resistant coating according to the actual application scenario, so as to realize targeted functions such as electromagnetic interference shielding, structural sealing reinforcement or high temperature ablation protection respectively; the three-proof coating can effectively resist the corrosion of harsh environments such as humidity, salt spray, and mold, significantly improve the environmental adaptability and service life of the end cap, and expand its application scenarios.

[0033] (6) The monolithic launch box end cap of the present invention has a simple structure, a simple and controllable manufacturing process, and a low cost.

[0034] (7) The present invention also provides a missile launch box with a single-piece ejection type launch box end cover, which can be ejected as a whole, can be compatible with the top-breaking and expansion-breaking working conditions, has good engineering application conditions, can significantly improve the stability of the missile launch system and the probability of mission success, and has important practical value and promotion prospects. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the present invention; In the diagram, 1-cover body; 2-impact resistant functional layer; 3-auxiliary functional layer; 4-three-proof coating. Detailed Implementation

[0036] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0037] Unless otherwise specified, the reagents, methods, instruments, and equipment used in this invention are conventional in the art. Unless otherwise specified, the reagents and materials used in the following examples are all commercially available.

[0038] Example 1 This embodiment provides a single-piece ejector box end cap that is compatible with both radome bursting and shock wave bursting. The end cap includes a cover body 1, and an impact-resistant functional layer 2 is provided on the inner surface of the cover body 1. The impact-resistant functional layer 2 is made of a resin matrix and a reinforcing material composite.

[0039] Example 2 This embodiment provides a single-piece ejector box end cap that is compatible with both radome bursting and shock wave bursting, with the specific structure as follows: In this embodiment, the cover body 1 can be selected from any of the following material structures: fiberglass structure; sandwich composite structure with foam as the core layer and fiberglass as the panel layer; multi-layer composite structure with fiberglass as the matrix, foam as the core and structural support material as the reinforcing skeleton, wherein the structural support material can be wood strips or stainless steel pipes.

[0040] In this embodiment, the impact-resistant functional layer 2 is made of a resin matrix and a reinforcing material. The resin matrix can be selected from one or more of epoxy resin, phenolic resin, polyurethane, and polyester resin, and the reinforcing material can be selected from one or more of carbon fiber and fabric, glass fiber and fabric, aramid fiber and fabric, and ultra-high molecular weight polyethylene fiber and fabric. The molding process of the impact-resistant functional layer 2 can be one or more of hand lay-up molding, press hot pressing molding, autoclave molding, die molding, and vacuum-assisted molding.

[0041] In this embodiment, the combination of the cover body 1 and the impact-resistant functional layer 2 can be either integrally molded or separately molded and then fixedly connected by mechanical assembly or bonding.

[0042] Example 3 This embodiment provides a single-piece ejector box end cap that is compatible with both radome bursting and shock wave bursting, such as... Figure 1 As shown, the inner surface of the cover body 1 is provided with an impact-resistant functional layer 2. On the side of the impact-resistant functional layer 2 away from the cover body 1, an auxiliary functional layer 3 and a three-proof coating 4 are sequentially stacked. The outer surface of the cover body 1 is directly provided with the auxiliary functional layer 3 and the three-proof coating 4 sequentially stacked. The auxiliary functional layer 3 can be selected from one or more of electromagnetic shielding coatings, sealing coatings, and ablation-resistant coatings. Both the auxiliary functional layer 3 and the three-proof coating 4 are prepared by any one of thermal spraying, air spraying, or brushing processes.

[0043] Example 4 This embodiment provides a missile launch box with an end cover that is a single piece of ejectable launch box end cover as in embodiment 1, 2 or 3. The missile launch box can be adapted to two launch conditions: radome bursting and shock wave bursting. During missile launch, the end cover can be reliably ejected as a single piece.

[0044] Example 5 In this embodiment, the end cap is a circular flat plate. The cap body 1 is made of fiberglass and is formed by hot pressing of fiberglass prepreg.

[0045] In this embodiment, the impact-resistant functional layer 2 is prepared on the inner surface of the cover body 1 using a hand lay-up molding process. The specific implementation steps are as follows: (1) Material preparation: The resin system consisting of epoxy resin, curing agent and acetone is adopted. The reinforcing materials are 10 layers of glass fiber plain weave cloth (denoted as A) and 6 layers of aramid fiber fabric (denoted as B). (2) Laying operation: Lay the layers one by one in the order of 4A+(B+A)×6, that is, first lay 4 layers of glass fiber plain weave fabric A, and then alternately lay 6 sets of "1 layer of aramid fiber fabric B+1 layer of glass fiber plain weave fabric A". During the laying process, the resin system is used to impregnate and bond the materials of each layer. (3) Curing and molding: After the layering is completed, the cover body 1 and the impact-resistant functional layer 2 are placed in the curing environment and the molding is completed by step curing process of keeping at 40℃ for 3 hours and 60℃ for 3 hours.

[0046] The performance of the launch box end cap prepared in this embodiment was tested, and the results are as follows: Simulated shock wave bursting condition: Under gas pressure, the end cap was reliably ejected as a whole piece. The measured opening pressure was 0.098 MPa, which is basically equivalent to the opening pressure of the end cap without an impact-resistant functional layer (the opening pressure is 0.094 MPa without an impact-resistant coating). Under the condition of radome puncture: When subjected to an impact load of 8500N, the end cap was ejected as a whole along the preset trajectory without any puncture or subsequent flight with the cap on. There were no obvious signs of damage such as cracks on the surface, and the missile radome was undamaged and performed in good condition.

[0047] Example 6: In this embodiment, the end cap is a round top hat shape with a height of 100mm.

[0048] In this embodiment, the cover body 1 is a sandwich composite structure with foam as the core layer and fiberglass as the panel layer. The preparation process is as follows: polyurethane foam is used as the core of the sandwich layer, and fiberglass prepreg is evenly laid on its upper and lower surfaces respectively, and integrally formed by hot autoclave to obtain the cover body 1.

[0049] In this embodiment, the impact-resistant functional layer 2 is prepared on the inner surface of the cover body 1 using an autoclave integral molding process. The specific implementation steps are as follows: (1) Using polyurethane foam as the core of the sandwich layer, fiberglass prepreg is evenly laid on its upper and lower surfaces to complete the layering of the cover body 1. (2) After the cover body 1 is laid, one side surface is designated as the inner surface. Using the inner surface as the reference surface, the glass fiber prepreg, aramid plain weave cloth and adhesive film are laid in sequence. This combination is repeated 5 times. (3) Continue to lay the aramid plain weave fabric and the film in sequence, repeating this combination 3 times; (4) Integrated molding in autoclave: The cover body 1 and the impact-resistant functional layer 2 are placed into the autoclave as a whole, and the autoclave process is used to achieve integrated curing and molding, ensuring that the layers are firmly bonded and the structure is dense.

[0050] The performance of the launch box end cap prepared in this embodiment was verified, and the test results are as follows: Simulated shock wave bursting condition: Under the action of gas pressure, the end cap was stably ejected as a whole piece. The measured opening pressure was 0.108 MPa, which is basically equivalent to the opening pressure of the end cap without the impact-resistant functional layer 2 (the opening pressure is 0.102 MPa without the impact-resistant coating). Under radome puncture test: When subjected to an impact load of 6700N, the end cap was ejected as a whole along the preset path without any puncture or subsequent flight with the cap on. There were no obvious signs of damage such as cracks on the surface, and the missile radome was undamaged and its performance remained intact.

[0051] Example 7 Based on Example 6, a silver-based conductive layer is applied by brushing on the side of the impact-resistant functional layer 2 facing the inner surface of the cover body 1, and a nickel-based coating is applied by air spraying on the outer surface of the conductive layer to form a composite electromagnetic shielding structure of silver-based conductive layer-nickel-based coating; then, a three-proof coating is prepared by spraying on the outer surface of the cover body 1 and the outer surface of the nickel-based coating.

[0052] The performance of the transmitter box end cap prepared in this embodiment was verified. The electromagnetic shielding effect of the end cap in this embodiment reached 25dB. It passed the electromagnetic compatibility test along with the transmitter box. At the same time, the end cap successfully passed the salt spray, mold and humid heat environment tests. The environmental adaptability and electromagnetic shielding performance both meet the design requirements.

[0053] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A single-piece ejector box end cap compatible with both radome bursting and shock wave bursting, characterized in that, It includes a cover body (1), and the inner surface of the cover body (1) is provided with an impact-resistant functional layer (2), which is composed of a resin matrix and a reinforcing material.

2. The integral ejector box end cap compatible with radome bursting and shock wave bursting as described in claim 1, characterized in that, The cover body (1) is any one of the following: a fiberglass structure, a sandwich composite structure with foam as the core layer and fiberglass as the panel layer, or a multi-layer composite structure with fiberglass as the matrix, foam as the core, and structural support material as the reinforcing skeleton.

3. The integral ejector box end cap compatible with radome bursting and shock wave bursting as described in claim 2, characterized in that, The structural support materials include wooden strips or stainless steel pipes.

4. The integral ejector box end cap compatible with radome puncture and shock wave bursting as described in claim 1, characterized in that, The resin matrix is ​​any one or more of epoxy resin, phenolic resin, polyurethane, and polyester resin.

5. The integral ejector box end cap compatible with radome bursting and shock wave bursting as described in claim 1, characterized in that, The reinforcing material is any one or more of carbon fiber and fabric, glass fiber and fabric, aramid fiber and fabric, and ultra-high molecular weight polyethylene fiber and fabric.

6. The integral ejector box end cap compatible with radome puncture and shock wave bursting as described in claim 1, characterized in that, The impact-resistant functional layer (2) is formed by any one or more of the following methods: hand lay-up molding, press hot pressing molding, autoclave molding, mold molding, and vacuum-assisted molding.

7. The integral ejector box end cap compatible with radome puncture and shock wave bursting as described in claim 1, characterized in that, The impact-resistant functional layer (2) is further provided with an auxiliary functional layer (3) and a three-proof coating (4) on the side surface away from the cover body (1). The outer surface of the cover body (1) is also provided with an auxiliary functional layer (3) and a three-proof coating (4).

8. The integral ejector box end cap compatible with radome bursting and shock wave bursting as described in claim 7, characterized in that, The auxiliary functional layer (3) is any one or more of an electromagnetic shielding coating, a sealing coating, or an ablation-resistant coating; the auxiliary functional layer (3) and the three-proof coating (4) are prepared by any one of thermal spraying, air spraying, or brushing processes.

9. The integral ejector box end cap compatible with radome puncture and shock wave bursting as described in claim 1, characterized in that, The cover body (1) and the impact-resistant functional layer (2) are integrally molded or formed separately and then connected by mechanical assembly or bonding.

10. A missile launch box, characterized in that, The end cover of the missile launch box adopts the single-piece ejection type launch box end cover as described in any one of claims 1-9. The missile launch box can be used for two launch conditions: radome bursting and shock wave bursting. During missile launch, the end cover is ejected as a single piece.

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