A functional and structural integrated sandwich structure

Abstract

The present application belongs to the field of aircraft structural functional structure design, and particularly relates to a functional structure integrated sandwich structure, which includes: an outer panel, an inner panel and a sandwich layer sandwiched between the outer panel and the inner panel; the sandwich layer includes a grid structure and an electromagnetic functional module, the electromagnetic functional module is a structure well known to those skilled in the art, the grid structure includes a grid bottom and vertical ribs on the grid bottom surface, the vertical ribs form a plurality of grids, the grids accommodate the electromagnetic functional module, the electromagnetic functional module is fixed and precisely positioned, the grid bottom is the interface layer of the electromagnetic functional module, and is also a part of the internal surface of the structure, which is used to form the external contour of the structure, maintain the structural integrity, reduce the structural weight, and realize the functional structure integration.

Description

Technical Field

[0001] The present application belongs to the field of aircraft structure functional structure design, and in particular relates to a functional structure integrated sandwich structure. Background Art

[0002] In the functional structure design, the integration degree between the functional layer and the structural body is not high, and the existing sandwich structure cannot meet the needs of the functional structure. Generally, the resin and the functional layer are solidified together by injection molding in the design, resulting in the position and shape of the electromagnetic functional module cannot be fixed, or the placement of the electromagnetic functional module cannot be unified. In addition, the unified injection molding method lacks structural design, making the structure bloated, resulting in problems such as heavy weight. Summary of the invention

[0003] In order to solve the above problems, the present application provides a functional structure integrated sandwich structure, which is composed of multiple structural layers or functional layers, including: an outer panel, an inner panel and a sandwich layer;

[0004] The sandwich layer includes a grid structure and an electromagnetic functional module. The grid structure includes a grid bottom and vertical ribs formed by protrusions on the grid bottom surface. The vertical ribs surround a plurality of grids. The grids accommodate the electromagnetic functional modules. The grid bottom has through holes connected to the electromagnetic functional modules, which are used to form an interface for conducting electricity to the electromagnetic functional modules. The electromagnetic functional module is a device well known to those skilled in the art, and has the function of radiating or receiving electromagnetic signals.

[0005] The grid bottom includes an outer surface and an inner surface with vertical ribs, the sandwich layer is sandwiched between the outer panel and the inner panel, the inner panel is located at the inner surface, and the outer panel is located at the outer surface, wherein the middle of the inner panel is hollowed out to expose the inner surface.

[0006] Preferably, the outer edge of the sandwich layer is connected with a functional medium, and the structure of the functional medium is a foam structure or a honeycomb structure, which reduces the weight of the sandwich layer on the one hand and facilitates the fixation of the sandwich layer on the other hand.

[0007] Preferably, the material of the functional medium includes, according to preset needs, wave-absorbing artificial medium material, wave-transmitting artificial medium material, heat-generating artificial medium material or rigidity-supporting artificial medium material, and the use of different materials can enable the device to achieve corresponding technical effects.

[0008] Preferably, the grid structure is in a U-shape, which facilitates cooperation with the electromagnetic functional module. When a grid structure accommodates multiple electromagnetic functional modules, small gap cooperation can also be achieved, making the structure more stable.

[0009] Preferably, each of the grids accommodates an electromagnetic functional module, which can achieve precise positioning of the electromagnetic functional modules and reduce interference between the electromagnetic functional modules.

[0010] Preferably, the internal structure of the grid structure adopts a lattice lightweight structure, which has a complex structure and cannot be realized by conventional processing methods, and is manufactured by 3D printing additive manufacturing.

[0011] Preferably, the material of the grid structure includes resin, plastic, nylon or fiber-reinforced material, which can significantly reduce the weight of the grid structure.

[0012] Preferably, the material of the grid structure is metal, which has higher strength and can directly form an electrical path to meet the grounding and electrical conductivity requirements of the electromagnetic functional module, thereby reducing the processing cost.

[0013] Preferably, the bottom of the grid includes an outer surface and an inner surface having vertical ribs, the bottom of the grid has a through hole connecting the inner surface and the outer surface, the inner surface, the outer surface and the wall of the through hole all have a metallized coating. Because the material of the grid structure is a non-metallic material, electrical conduction between the inner surface and the outer surface is required through the metal coating of the through hole.

[0014] Preferably, the grids of the grid structure are arranged in a hyperbolic nonlinear manner.

[0015] The advantages of the present application include: an integrated design scheme for the sandwich layer, the structural body and the functional layer is proposed: the core body adopts a grid structure suitable for the design requirements, and the interior of the grid adopts a lightweight lattice structure to reduce the weight of the structure; the grid plays a role in positioning the functional module, and another role is to serve as the sandwich layer of the structure after integration with the functional module to improve the structural rigidity; a feed layer is provided at the bottom of the grid, which serves as the grounding layer of the functional module and is also the internal panel of the structure to maintain the structural integrity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a sandwich structure of a preferred embodiment of the present application;

[0017] Figure 2 It is a schematic cross-sectional view of a sandwich layer according to a preferred embodiment of the present application;

[0018] Figure 3 is a detailed schematic diagram of a grid structure of a preferred embodiment of the present application;

[0019] Among them, 1-sandwich structure; 101-outer panel; 102-sandwich layer; 103-inner panel; 203-grid structure; 202-functional medium; 201-electromagnetic functional module; 301-vertical ribs; 302-grid bottom; 303-lattice lightweight structure; 304-metallized coating. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the implementation of this application will be described in more detail in combination with the drawings in the implementation of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and cannot be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in combination with the drawings.

[0021] Embodiment 1: The sandwich structure with integrated functional structure is applied to the integration of aircraft antenna array and structure. The originally independently installed antenna is miniaturized to form electromagnetic functional modules 201, which are integrated with the structure body in the form of antenna array according to the following composite sandwich structure, that is, it has the antenna receiving function and can withstand the aircraft load, and is an integrated structure with multiple functions. The sandwich structure with integrated functional structure of the antenna array is composed of multiple structural layers or functional layers, including: an outer panel 101, an inner panel 103, and a sandwich layer 102 sandwiched between the outer panel 101 and the inner panel 103;

[0022] The sandwich layer 102 includes a grid structure 203 and an electromagnetic functional module 201. The electromagnetic functional module 201 is a structure well known to those skilled in the art. The grid structure 203 includes a grid bottom 302 and vertical ribs 301 on the surface of the grid bottom 302. The vertical ribs 301 form a plurality of grids, which accommodate the electromagnetic functional module 201, fix and precisely position the electromagnetic functional module 201, and the grid bottom 302 is the interface layer of the electromagnetic functional module 201 and is also part of the internal surface of the structure, which is used to form the external contour of the structure and maintain the structural integrity.

[0023] Furthermore, the outer edge of the sandwich layer 102 is connected to a functional medium 202 , and the structure of the functional medium 202 is a foam structure or a honeycomb structure.

[0024] Furthermore, the material of the functional medium 202 includes, according to preset requirements, wave absorbing artificial medium material, wave transmitting artificial medium material, heat generating artificial medium material or rigidity supporting artificial medium material.

[0025] Furthermore, the grid structure 203 is in a square shape.

[0026] Furthermore, each of the grids accommodates an electromagnetic functional module 201 , which can achieve accurate positioning of the electromagnetic functional modules 201 and reduce interference between the electromagnetic functional modules 201 .

[0027] Furthermore, the internal structure of the grid structure 203 adopts a lattice lightweight structure 303, which has a complex structure and cannot be processed by conventional processing methods, and is manufactured by 3D printing.

[0028] Furthermore, the material of the grid structure 203 includes resin, plastic, nylon or fiber-reinforced material, which can significantly reduce the weight of the grid structure 203.

[0029] Furthermore, the grid bottom 302 includes an outer surface and an inner surface having vertical ribs 301. The grid bottom 302 has a through hole connecting the inner surface and the outer surface. The through hole can form an interface of the electromagnetic functional module 201. The inner surface has a metallized coating 304. The metallized coating 304 forms a grounding layer for the electromagnetic functional module 201. In addition, the outer surface also has a metallized coating 304 to increase corrosion resistance and wear resistance.

[0030] Embodiment 2: Functional structure integrated sandwich structure, which is composed of multiple structural layers or functional layers, including: an outer panel 101, an inner panel 103 and a sandwich layer 102;

[0031] The sandwich layer 102 includes a grid structure 203 and an electromagnetic function module 201. The grid structure 203 includes a grid bottom 302 and vertical ribs 301 formed by protrusions on the surface of the grid bottom 302. The vertical ribs 301 surround a plurality of grids, and the grids accommodate the electromagnetic function module 201. The grid bottom 302 has through holes connected to the electromagnetic function module 201.

[0032] The grid bottom 302 includes an outer surface and an inner surface with vertical ribs 301, and the sandwich layer 102 is sandwiched between the outer panel 101 and the inner panel 103, the inner panel 103 is located at the inner surface, and the outer panel 101 is located at the outer surface, wherein the middle of the inner panel 103 is hollowed out to expose the inner surface.

[0033] In some optional embodiments, the outer edge of the sandwich layer 102 is connected to a functional medium 202 , and the structure of the functional medium 202 is a foam structure or a honeycomb structure.

[0034] In some optional embodiments, the material of the functional medium 202 includes, according to preset needs, wave absorbing artificial medium material, wave transmitting artificial medium material, heat generating artificial medium material or rigidity supporting artificial medium material.

[0035] In some optional embodiments, the grid structure 203 is in a U-shape, and each of the grids accommodates an electromagnetic functional module 201 , which can achieve precise positioning of the electromagnetic functional modules 201 and reduce interference between the electromagnetic functional modules 201 .

[0036] In some optional embodiments, the material of the grid structure 203 is metal, which can directly form an interface of the electromagnetic functional module 201 and energize the electromagnetic functional module 201. It also has a simple structure and low processing cost. Its structure is complex and cannot be realized by conventional processing methods, so 3D printing additive manufacturing is used.

[0037] The advantages of the present application include: an integrated design scheme for the sandwich layer, the structural body and the functional layer is proposed: the core body adopts a grid structure suitable for the design requirements, and the interior of the grid adopts a lightweight lattice structure to reduce the weight of the structure; the grid plays a role in positioning the functional module, and another role is to serve as the sandwich layer of the structure after integration with the functional module to improve the structural rigidity; a feed layer is provided at the bottom of the grid, which serves as the grounding layer of the functional module and is also the internal panel of the structure to maintain the structural integrity.

[0038] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A functional structure integrated sandwich structure, characterized in that: include: An outer panel (101), an inner panel (103) and a core layer (102); The sandwich layer (102) comprises a grid structure (203) and an electromagnetic function module (201); the grid structure (203) comprises a grid bottom (302) and vertical ribs (301) formed by protrusions on the surface of the grid bottom (302); the vertical ribs (301) surround a plurality of grids, and the grids accommodate the electromagnetic function module (201); The grid bottom (302) comprises an outer surface and an inner surface having vertical ribs (301), the grid bottom (302) having a through hole connecting the inner surface and the outer surface, the through hole forming an interface of the electromagnetic function module (201), the inner surface having a metallized coating (304), the sandwich layer (102) being sandwiched between the outer panel (101) and the inner panel (103), the inner panel (103) being located at the inner surface, and the outer panel (101) being located at the outer surface, wherein the middle of the inner panel (103) is hollowed out so that the inner surface is exposed.

2. The functional structure integrated sandwich structure according to claim 1, characterized in that: The outer edge of the sandwich layer (102) is connected to a functional medium (202), and the structure of the functional medium (202) is a foam structure or a honeycomb structure.

3. The functional structure integrated sandwich structure according to claim 2, characterized in that: The material of the functional medium (202) includes a wave-absorbing artificial medium material, a wave-transmitting artificial medium material, a heat-generating artificial medium material, or a rigidity-supporting artificial medium material.

4. The functional structure integrated sandwich structure according to claim 1, characterized in that: The grid structure (203) is in the shape of a square.

5. The functional structure integrated sandwich structure according to claim 1, characterized in that: Each of the grids accommodates an electromagnetic functional module (201).

6. The functional structure integrated sandwich structure according to claim 1, characterized in that: The internal structure of the grid structure (203) adopts a lattice lightweight structure (303).

7. The functional structure integrated sandwich structure according to claim 6, characterized in that: The material of the grid structure (203) includes resin, plastic, nylon or fiber-reinforced material.

8. The functional structure integrated sandwich structure according to claim 6, characterized in that: The material of the grid structure (203) is metal.

9. The functional structure integrated sandwich structure according to claim 1, characterized in that: The cross section of the functional structure integrated sandwich structure is a hyperbolic nonlinear shape.

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