Aircraft model cabin honeycomb core partial crush reinforcement device

Abstract

The utility model discloses a kind of aircraft model cabin honeycomb core local crushing reinforcement device, including including center module, peripheral module and negative pressure cover;The top surface of center module can heat, bottom surface can expand, the periphery of the center module is evenly provided with several peripheral modules;Peripheral module is flexibly connected with the center module;The center module carries several peripheral modules and is jointly attached in the aircraft model cabin crushing area;Negative pressure cover, annularly covers and is attached in the aircraft model cabin crushing area, the negative pressure cover completely covers the center module and the peripheral module, the center module at least partially passes through the negative pressure cover;Through flexible connection, each module can self-adapting cabin curved surface;Through negative pressure cover, initial overall compression force is provided, then through the independent expansion of each module bottom surface, accurate, differentiated local pressure is provided, ensure that reinforcing area stress is uniform, bonding firm.

Description

Technical Field

[0001] This utility model relates to the field of cabin partial reinforcement technology, and in particular to a device for partial crushing reinforcement of honeycomb core of aircraft model cabin. Background Technology

[0002] The honeycomb core of the aircraft model cabin is the core material in the aerospace composite sandwich structure, and its design must take into account lightweight, high strength and functionality.

[0003] In composite honeycomb sandwich structures, localized crushing refers to the failure phenomenon where the cell walls of the honeycomb core material buckle, fracture, or collapse in a localized area when subjected to impact loads. This phenomenon is usually related to concentrated impact energy, uneven distribution of material stiffness, or mismatch of structural parameters, and directly affects the load-bearing capacity and energy absorption characteristics of the structure.

[0004] In existing honeycomb structure reinforcement technologies, both integral rigid blocks and traditional vacuum bag methods have obvious limitations.

[0005] Integral pressure blocks cannot conform to complex curved surfaces, easily leading to insufficient edge pressure; vacuum bag methods tend to "bridge" on curved surfaces, resulting in low pressure transmission efficiency, and the assembly of the entire system is time-consuming and labor-intensive. Therefore, a device is needed that can automatically conform to curved surfaces and apply differentiated and precise pressure to the center and edges of the reinforcement area. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a local crushing reinforcement device for the honeycomb core of an aircraft model cabin, a reinforcement and pressurization device that can adapt to curved surfaces, has uniform and adjustable pressure, and integrates heating function.

[0007] The purpose of this utility model is achieved through the following technical solution: a local crushing reinforcement device for the honeycomb core of an aircraft model cabin, comprising a central module, a peripheral module and a negative pressure sleeve.

[0008] The top surface of the central module can generate heat and the bottom surface can expand. Several peripheral modules are evenly arranged around the central module. The peripheral modules are flexibly connected to the central module. The central module carries several peripheral modules and is attached to the crushed area of ​​the aircraft model cabin. A negative pressure sleeve is annularly wrapped and attached to the crushed area of ​​the aircraft model cabin. The negative pressure sleeve completely covers the central module and the peripheral modules, and the central module passes through the negative pressure sleeve at least partially.

[0009] Through flexible connections, each module can adapt to the curved surface of the cabin; the initial overall clamping force is provided by the negative pressure sleeve, and the precise and differentiated local pressure is provided by the independent expansion of the bottom surface of each module, ensuring that the reinforced area is uniformly stressed and firmly bonded.

[0010] The present invention is further configured such that: the central module includes a central plate, a central heating plate and a central airbag, the central heating plate is provided on the top surface of the central plate and the central airbag is provided on the bottom surface of the central plate.

[0011] The center of the reinforced area is programmed to be heated and cured by the central heating plate; gas is injected into the central airbag to make it expand, and pressure perpendicular to the surface of the cabin is applied to the center of the reinforced area.

[0012] The present invention is further configured such that: an interactive cavity is provided inside the central plate; a plurality of interfaces communicating with the interactive cavity are evenly provided on the circumferential sidewall of the central plate; and at least one inflation port communicating with the interactive cavity is provided on the top surface of the central plate; and the interactive cavity is connected to the central airbag.

[0013] The interactive cavity serves as an integrated gas distribution center. After an external gas source enters the interactive cavity through the inflation port, it can simultaneously supply gas to the connected peripheral modules through various interfaces, thereby achieving centralized control and synchronous operation of the gas path.

[0014] The present invention is further configured such that: the peripheral module includes a peripheral plate, a peripheral heating plate and a peripheral airbag, the peripheral heating plate is provided on the top surface of the peripheral plate, the peripheral airbag is provided on the bottom surface of the peripheral plate, and an interface is provided on the side wall of the peripheral plate.

[0015] The interface connects to the interface of the center plate via a flexible connecting pipe, allowing the interactive cavity of the center plate to supply air to the peripheral airbags; the peripheral heating plate is used to heat the edge area of ​​the reinforcing sheet, and the peripheral airbags apply pressure to this critical area of ​​the edge of the reinforcing sheet after they expand.

[0016] The present invention is further configured such that the central plate and the peripheral plate are metal plates.

[0017] By using metallic materials, taking advantage of their excellent thermal conductivity and structural strength, the heat generated by the heating plate can be quickly and evenly transferred to the reinforcement area. On the other hand, it can provide solid support for the expansion of the airbag and prevent uneven pressure.

[0018] The present invention is further provided with adhesive at the inner edge of the negative pressure sleeve.

[0019] The adhesive can be used to tightly and reliably seal the negative pressure sleeve onto the surface of the aircraft cabin, forming a closed space that facilitates subsequent vacuuming operations.

[0020] This utility model has the following beneficial effects: Modular design and flexible connection enable the device to perfectly fit the complex curved surface of the aircraft cabin; the airbag at the bottom of each module can expand independently, providing uniform pressure that is always perpendicular to the curved surface, fundamentally solving the technical problems that traditional rigid pressure blocks cannot fit the curved surface and that the vacuum bag method is prone to "bridging" on the curved surface, resulting in insufficient edge pressure. Heating, pressurization, gas distribution, and electrical connections are highly integrated into a compact device. Through a unified interface in the central module, it connects to external systems. On-site operation requires only a few steps, such as attaching the negative pressure sleeve and connecting the main gas pipe and main power cord, greatly improving maintenance efficiency and reducing reliance on operator skills. Attached Figure Description

[0021] Figure 1 This is a perspective view of the negative pressure sleeve in an embodiment of this utility model; Figure 2 This is a complete installation diagram of the central module in an embodiment of this utility model; Figure 3 This is a connection diagram of the central module and the peripheral modules in an embodiment of this utility model; Figure 4 This is a cross-sectional view of the central module and the peripheral modules in an embodiment of this utility model.

[0022] In the picture: 1. Negative pressure sleeve; 11. Negative pressure port; 2. Central module; 21. Inflation port; 22. Central heating plate; 23. Central plate; 24. Interface; 25. Central airbag; 26. Connector; 27. Interaction chamber; 3. Peripheral module; 31. Peripheral heating plate; 32. Peripheral plate; 33. Peripheral airbag; 4. Flexible connecting pipe. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0024] 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 to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The following is in conjunction with the appendix Figure 1-4 The present invention will be described in further detail below, but the scope of protection of the present invention is not limited to the following description.

[0030] like Figure 1 As shown, a partial crushing reinforcement device for the honeycomb core of an aircraft model cabin includes a central module 2, a peripheral module 3, and a negative pressure sleeve 1.

[0031] The top surface of the central module 2 can generate heat and the bottom surface can expand. Several peripheral modules 3 are evenly arranged around the central module 2. Peripheral module 3 is flexibly connected to central module 2; The central module 2, along with several peripheral modules 3, fits together in the crushed area of ​​the aircraft model's cabin. The negative pressure sleeve 1 is a ring-shaped covering and attached to the crushed area of ​​the aircraft model cabin. The negative pressure sleeve 1 completely covers the central module 2 and the peripheral modules 3. The central module 2 at least partially passes through the negative pressure sleeve 1. Through flexible connections, each module can adapt to the curved surface of the cabin; the initial overall clamping force is provided by the negative pressure sleeve 1, and the precise and differentiated local pressure is provided by the independent expansion of the bottom surface of each module, ensuring that the reinforced area is uniformly stressed and firmly bonded.

[0032] The central module 2 includes a central plate 23, a central heating plate 22, and a central airbag 25. The central heating plate 22 is provided on the top surface of the central plate 23, and the central airbag 25 is provided on the bottom surface of the central plate 23. The central heating plate 22 is used to programmatically heat and solidify the center of the reinforced area. By filling the central airbag 25 with gas, it expands and applies pressure perpendicular to the surface of the cabin to the center of the reinforced area.

[0033] The center plate 23 has an interactive cavity 27 inside. Several interfaces 24 communicating with the interactive cavity 27 are evenly arranged on the circumferential sidewall of the center plate 23. The top surface of the center plate 23 is also provided with at least one inflation port 21 communicating with the interactive cavity 27. The interactive cavity 27 is connected to the central airbag 25. The interactive cavity 27 serves as an integrated air distribution center. After the external air source enters the interactive cavity 27 through the inflation port 21, it can simultaneously supply air to the connected peripheral modules 3 through each interface 24, realizing centralized control and synchronous operation of the air path.

[0034] The peripheral module 3 includes a peripheral plate 32, a peripheral heating plate 31, and a peripheral airbag 33. The peripheral heating plate 31 is provided on the top surface of the peripheral plate 32, and the peripheral airbag 33 is provided on the bottom surface of the peripheral plate 32. An interface 24 is provided on the side wall of the peripheral plate 32. The interface 24 is connected to the interface 24 of the central plate 23 through a flexible connecting pipe 4, so that the interaction cavity 27 of the central plate 23 can supply air to the peripheral airbag 33. The peripheral heating plate 31 is used to heat the edge area of ​​the reinforcing sheet, and the peripheral airbag 33 applies pressure to the critical area of ​​the edge of the reinforcing sheet after it expands.

[0035] The central plate 23 and the peripheral plate 32 are metal plates. By using metal materials, and taking advantage of their excellent thermal conductivity and structural strength, the heat generated by the heating plate can be quickly and evenly transferred to the reinforcing area. On the other hand, it can provide solid support for the expansion of the airbag and prevent uneven pressure.

[0036] Adhesive is provided on the inner edge of the negative pressure sleeve 1; the adhesive can be used to tightly and reliably seal and stick the negative pressure sleeve 1 to the surface of the aircraft cabin, forming a closed space, which facilitates subsequent vacuuming operations.

[0037] The negative pressure sleeve 1 is provided with a negative pressure interface 24, which is connected to a vacuum pump. This is existing technology and will not be described in detail.

[0038] The central module 2 and the peripheral module 3 are connected by a flexible connecting tube 4, which integrates a micro air passage and an electrical wire. The micro air passage is used to transfer gas between the interaction cavity 27 of the central plate 23 and the peripheral airbag 33 of the peripheral module 3. Both ends of the flexible connecting tube 4 are also provided with connectors 26 corresponding to the interface 24. The interface 24 and the connectors 26 are of the same size and standard configuration. The electrical wire is used to connect the central heating plate 22, the peripheral heating plate 31 and the external temperature controller. This is existing technology and will not be described in detail. Through the flexible connecting tube 4 that integrates air and electrical circuits, the mechanical flexible connection, power transmission and signal control between the modules are realized, ensuring that the device can still operate normally when it is in contact with a curved surface.

[0039] As a preferred option, the top surface of the central module 2 is also provided with an electrical interface 24 that penetrates the negative pressure sleeve 1 and an inflation valve. The electrical interface 24 is electrically connected to the central heating plate 22 and the peripheral heating plate 31, or it can be electrically connected only to the central heating plate 22. The inflation valve is connected to the inflation port 21 of the central plate 23. The choice of which to use is based on the actual situation. Through the centralized electrical interface 24 and inflation valve, all external pipelines (power lines, air lines) can be uniformly led out from the central module 2, which simplifies the connection of external equipment and avoids the cumbersome and potential leakage risks caused by multiple wiring.

[0040] In this embodiment, a sealing groove is also provided at the bottom edge of the center plate 23 and the peripheral plate 32, and a sealing strip is provided in the sealing groove.

[0041] In this embodiment, the central airbag 25 and the peripheral airbag 33 are heat-resistant silicone airbags, and the sealing strip is a heat-resistant sealing strip.

[0042] This utility model has the following beneficial effects: Modular design and flexible connection enable the device to perfectly fit the complex curved surface of the aircraft cabin; the airbag at the bottom of each module can expand independently, providing uniform pressure that is always perpendicular to the curved surface, fundamentally solving the technical problems that traditional rigid pressure blocks cannot fit the curved surface and that the vacuum bag method is prone to "bridging" on the curved surface, resulting in insufficient edge pressure. Heating, pressurization, gas distribution, and electrical connections are highly integrated into a compact device. It connects to external systems via a unified interface 24 in the central module 2. On-site operation requires only a few steps, such as attaching the negative pressure sleeve 1 and connecting the main gas pipe and main power line, greatly improving maintenance efficiency and reducing reliance on operator skills.

[0043] Through the air path design, independent or differentiated pressure control can be achieved for the central module 2 and the peripheral modules 3. Higher pressure can be applied to the edge areas where the reinforcing sheet is most easily peeled off, which significantly improves the bonding reliability and curing quality of the reinforcing sheet.

[0044] The metal substrate and integrated heating element ensure efficient and uniform heat conduction. Combined with precise pressure control, it provides the best process environment for the curing of reinforcing materials, ensuring that the mechanical properties after repair are restored to their optimal state.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A localized crushing reinforcement device for the honeycomb core of an aircraft model cabin, characterized in that: The central module (2) has a top surface that can generate heat and a bottom surface that can expand. Several peripheral modules (3) are evenly arranged around the central module (2). The peripheral module (3) is flexibly connected to the central module (2); The central module (2) carries several peripheral modules (3) which are attached together to the crushed area of ​​the aircraft model cabin; A negative pressure sleeve (1) is annularly wrapped and fitted to the crushed area of ​​the aircraft model cabin. The negative pressure sleeve (1) completely covers the central module (2) and the peripheral module (3). The central module (2) passes through the negative pressure sleeve (1) at least partially.

2. The partial crushing reinforcement device for the honeycomb core of an aircraft model cabin according to claim 1, characterized in that: The central module (2) includes a central plate (23), a central heating plate (22) and a central airbag (25). The central heating plate (22) is provided on the top surface of the central plate (23), and the central airbag (25) is provided on the bottom surface of the central plate (23).

3. The partial crushing reinforcement device for the honeycomb core of an aircraft model cabin according to claim 2, characterized in that: The center plate (23) has an interactive cavity (27) inside. The circumferential sidewall of the center plate (23) is evenly provided with a plurality of interfaces (24) communicating with the interactive cavity (27). The top surface of the center plate (23) is also provided with at least one inflation port (21) communicating with the interactive cavity (27). The interactive cavity (27) is connected to the central airbag (25).

4. The partial crushing reinforcement device for the honeycomb core of an aircraft model cabin according to claim 3, characterized in that: The peripheral module (3) includes a peripheral plate (32), a peripheral heating plate (31) and a peripheral airbag (33). The peripheral heating plate (31) is provided on the top surface of the peripheral plate (32), the peripheral airbag (33) is provided on the bottom surface of the peripheral plate (32), and an interface (24) is provided on the side wall of the peripheral plate (32).

5. The partial crushing reinforcement device for the honeycomb core of an aircraft model cabin according to claim 4, characterized in that: The central plate (23) and the peripheral plate (32) are metal plates.

6. The partial crushing reinforcement device for the honeycomb core of an aircraft model cabin according to any one of claims 1-5, characterized in that: Adhesive is provided on the inner edge of the negative pressure sleeve (1).

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