A flexible connection assembly for airtight and electromagnetic shielding airborne products

Abstract

The present invention relates to a flexible connection component for airtight and electromagnetic shielding airborne products, comprising a component body and screws. The component body is a whole, a rotating body along the center line, and is divided into three parts: an inner ring, a flexible part, and an outer ring. Conductive rubber is sprayed on the inner and outer surfaces, and the interior is composed of three parts: a metal inner pressure ring, a flexible sheet, and a metal outer pressure ring. The flexible sheet is a composite material with a layered structure, composed of a rubber layer and a textile layer. In the flexible connection component of the present invention, a flexible material is used for the component body, and a flexible textile is added to the interior of the material, which greatly improves the tensile strength of the material and can meet the requirement of not deforming under a certain internal and external pressure difference. The flexible sheet is pre-set with a bending shape, and the angle and displacement deviation of the external mounting interface are compensated by the change of the bending shape. Conductive material with good bonding performance is sprayed to ensure good conduction everywhere while being airtight, meeting the requirements of most optoelectronic products for electromagnetic shielding.

Description

Technical Field

[0001] The present invention belongs to the technical field of flexible sealing connections, and in particular relates to a flexible connection assembly for airtight and electromagnetic shielding airborne products. Background Art

[0002] Aircraft-mounted products are subject to the harsh conditions of high altitude, high pressure, and high temperature, requiring strict sealing and the ability to withstand certain pressure differentials. Because electromagnetic interference can degrade product signal integrity, shielding of the internal electronic systems is essential.

[0003] In particular, each component in an airborne product needs to have sufficient strength, and there should be no obvious material elongation or compression when each component is subjected to a pressure difference.

[0004] Existing connection technologies are divided into rigid and flexible connections. Rigid connections are where structural parts are fixed and immobilized, meeting the strength and electromagnetic shielding requirements of airborne products. However, for systems where the product body and a component have different external mounting interfaces, such as the product body and its optical window, where the optical window is mounted on the aircraft skin and the body is mounted on the aircraft's internal frame, there are certain angles and displacement errors between the skin and the frame. Using a rigid connection would result in excessive constraints, preventing a proper installation. Flexible connections are required to compensate for these certain angles and displacement errors.

[0005] There are many types of flexible connections commonly used today that can compensate for displacement and angle of the connection, but they cannot simultaneously meet the requirements of high-voltage airtightness and electromagnetic shielding. The bending shape of these flexible connection components can change under external forces, but the components themselves cannot undergo significant deformation. Summary of the Invention

[0006] In order to overcome the shortcomings of low strength, poor sealing and weak electromagnetic shielding capability of flexible connections, the present invention proposes a flexible connection assembly for airtight and electromagnetic shielding airborne products.

[0007] The technical solution adopted by the present invention to solve the technical problem is:

[0008] A flexible connection component for airtight and electromagnetic shielding airborne products comprises a component body and screws.

[0009] The main body of the assembly is a whole, a rotating body along the center line, divided into three parts: inner ring, flexible part, and outer ring. The inner and outer surfaces are sprayed with conductive rubber, and the interior consists of three parts: metal inner pressure ring, flexible sheet, and metal outer pressure ring.

[0010] Conductive rubber is sprayed on the inner and outer surfaces of the component body.

[0011] The component body is fixedly connected to the product body and product parts by screws.

[0012] The cross-sections of the inner and outer surfaces of the flexible portion along the centerline of the component body are both circular arcs. The inner surface arc is tangent to the interface between the metal inner pressure ring and the flexible sheet. The radius of the inner surface arc is r, where r = 8-12 mm. The outer surface arc is a quarter circle and tangent to the interface between the flexible sheet and the product component. The radius of the outer surface arc is the sum of the inner surface arc radius r and the thickness of the flexible sheet.

[0013] The metal inner pressure ring is located inside the inner ring part, and the metal outer pressure ring is located inside the outer ring part.

[0014] The metal inner pressure ring is located on the inner side of the component body, and the metal outer pressure ring is located on the outer side of the component body.

[0015] The metal inner pressure ring and the metal outer pressure ring are both in the shape of a circular ring.

[0016] The metal inner pressure ring and the metal outer pressure ring are both bonded to the flexible sheet.

[0017] The metal inner pressure ring and the metal outer pressure ring are both made of aluminum alloy.

[0018] The flexible sheet is a layered composite material consisting of a rubber layer and a textile layer. The rubber layer and the textile layer are spaced apart, with the outer layer being a rubber layer. The number of textile layers is n, where n = 1 or 2, and the number of rubber layers is n + 1. The rubber layer is bonded to the textile layer. The thickness of a single rubber layer is 1.8 to 2.0 mm, and the thickness of a single textile layer is 0.5 to 0.8 mm. The textile layer is made of a textile material.

[0019] In the flexible connection assembly, the non-bonded surfaces of the metal inner and outer pressure rings may be coated with rubber in the assembly body. The coated rubber is a coating rubber layer. The coating rubber layer is bonded to the metal inner and outer pressure rings at their contact surfaces.

[0020] The covering rubber layer is formed by extending and turning over the rubber layer of the flexible sheet that is in close contact with the metal inner pressure ring and the metal outer pressure ring.

[0021] The above-mentioned flexible connection assembly further includes an outer conductive rubber pad and an inner conductive rubber pad.

[0022] The outer conductive rubber pad is an annular gasket made of conductive rubber material. It is installed between the outer ring of the component body and the interface of the product component. It matches the interface of the product component and is provided with screw holes that match the screws. The screw holes are evenly distributed along the circumference. The outer ring of the component body, the outer conductive rubber pad, and the product component interface are fixedly connected by screws.

[0023] The inner conductive rubber pad is an annular gasket made of conductive rubber material. It is installed between the inner ring of the component body and the interface of the product body, matches the interface of the product body, and is provided with screw holes that match the screws. The screw holes are evenly distributed along the circumference, and the inner ring of the component body, the outer conductive rubber pad, and the interface of the product body are fixedly connected by screws.

[0024] The beneficial effects of the present invention are:

[0025] A flexible connection component for airtight and electromagnetic shielding airborne products. The component body uses a flexible material, and a flexible textile is added inside the material, which greatly improves the tensile strength of the material and can meet the requirement of not deforming under a certain internal and external pressure difference.

[0026] The flexible connection assembly of the present invention pre-sets a bending shape for the flexible sheet, and compensates for angle and displacement deviations of the external mounting interface by changing the bending shape.

[0027] The flexible connection component of the present invention is sprayed with a conductive material with good bonding performance on the component body, ensuring good conduction everywhere while being airtight, and meeting the electromagnetic shielding requirements of most optoelectronic products.

[0028] The provision of the metal inner and outer pressure rings in the flexible connection assembly of the present invention effectively improves the rigidity of the installation interface of the flexible connection device and protects the stability of the flexible material at the installation interface.

[0029] In the flexible connection assembly of the present invention, silicone rubber is added to the joint between the metal inner pressure ring and the mounting screw to block the air path, making the airtight seal more reliable; the conductive rubber pad provided at the connection between the flexible device and the internal and external structural parts further improves the sealing reliability of the interface.

[0030] The flexible connection component of the present invention has the advantages of simple and error-proof assembly and good assembly processability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below with reference to the accompanying drawings and examples.

[0032] Figure 1 It is a schematic diagram of the structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the installation and use of the present invention;

[0034] Figure 3 It is a curved outline diagram of the present invention.

[0035] In the figure: 1. Metal inner pressure ring; 2. Outer conductive rubber pad; 3. Flexible sheet; 4. Metal outer pressure ring; 5. Inner conductive rubber pad; 6. Inflator nozzle; 7. Product components; 8. Component body; 9. Product body; 10. Screws. DETAILED DESCRIPTION

[0036] Examples 1, 2, and 3

[0037] A flexible connection component for airtight and electromagnetic shielding airborne products, comprising a component body 8 and a screw 10. Figure 1 shown.

[0038] Embodiments 1, 2, and 3 are described by taking the flexible connection between an airborne product body and an airborne product component as an example. The airborne product body is the product body 9 , and the airborne product component is the product component 7 .

[0039] like Figure 1 As shown, the product body 9 and the component body 8 are fixedly connected by screws 10 , and the product component 7 and the component body 8 are fixedly connected by screws 10 .

[0040] The airborne product is provided with an air filling nozzle 6, which is used to fill the interior of the product with air after the components are installed to verify the air tightness and pressure bearing capacity of the components.

[0041] The main body 8 is a whole, rotating body along the center line, divided into three parts: inner ring, flexible part and outer ring. The inner and outer surfaces are sprayed with conductive rubber, and the interior is composed of three parts: metal inner pressure ring 1, flexible sheet 3 and metal outer pressure ring 4.

[0042] Conductive rubber is sprayed on the inner and outer surfaces of the component body 8 to make the surface of the component body 8 conductive and have an electromagnetic shielding function.

[0043] The inner ring of the component body 8 is connected to the interface of the product body 9, and the outer ring of the component body 8 is connected to the interface of the product component 7.

[0044] Screw holes matching the interfaces of the product body 9 and the product component 7 are evenly arranged on the inner ring and the outer ring along the circumference. The screw holes match the screws 10 and are used to connect the interfaces of the product body 9 and the product component 7.

[0045] The inner ring and the outer ring match the interface of the product body 9 and the interface of the product component 7 respectively.

[0046] The interface of the product body 9 is connected to the inner side of the component body 8 , and the interface of the product component 7 is connected to the outer side of the component body 8 .

[0047] The cross-sections of the inner and outer surfaces of the flexible portion along the centerline of the component body 8 are both circular arcs. The inner surface arc is tangent to the interface between the metal inner pressure ring 1 and the flexible sheet 3. The radius of the inner surface arc is r, where r = 8 to 12 mm. The outer surface arc is a quarter circle and tangent to the interface between the flexible sheet 3 and the product component 7. The radius of the outer surface arc is the sum of the inner surface arc radius r and the thickness of the flexible sheet 3.

[0048] The metal inner pressure ring 1 is located inside the inner ring portion, and the metal outer pressure ring 4 is located inside the outer ring portion.

[0049] The metal inner pressure ring 1 is located inside the component body 8 , and the metal outer pressure ring 4 is located outside the component body 8 .

[0050] The metal inner pressure ring 1 and the metal outer pressure ring 4 are both in the shape of a circular ring.

[0051] The flexible sheet 3 passes through the inner ring, the flexible portion and the outer ring.

[0052] The metal inner pressure ring 1 and the metal outer pressure ring 4 are both bonded to the flexible sheet 3 .

[0053] The metal inner pressure ring 1 and the metal outer pressure ring 4 are both made of aluminum alloy.

[0054] The flexible sheet 3 is a layered composite material consisting of rubber and textile layers, with the rubber and textile layers spaced apart. The outer layer is a rubber layer. The number of textile layers is n, where n = 1 or 2, and the number of rubber layers is n + 1. The rubber and textile layers are bonded together. The thickness of a single rubber layer is a, which is 1.8 to 2.0 mm, and the thickness of a single textile layer is b, which is 0.5 to 0.8 mm. The textile layer is made of a textile material such as aramid or polyester.

[0055] Table 1, related parameters

[0056] Example 1 Example 2 Example 3 r / mm 8 8 12 n 1 2 2 a / mm 2 2 1.8 b / 1mm 0.5 0.5 0.8 Textile materials Aramid Aramid Polyester

[0057] Example 4

[0058] In the component body 8, the non-bonded surfaces of the metal inner pressure ring 1 and the metal outer pressure ring 4 can also be coated with rubber, and the coated rubber is a coating rubber layer. The coating rubber layer is bonded to the metal inner pressure ring 1 and the metal outer pressure ring 4 at the contact surface.

[0059] The covering rubber layer is formed by extending and turning over the rubber layer of the flexible sheet 3 which is in close contact with the metal inner pressure ring 1 and the metal outer pressure ring 4 .

[0060] Example 5

[0061] The flexible connection assembly further includes an outer conductive rubber pad 2 and an inner conductive rubber pad 5 .

[0062] like Figure 1 As shown, the outer conductive rubber pad 2 is an annular gasket made of conductive rubber material. It is installed between the outer ring of the component body 8 and the interface of the product component 7. It matches the interface of the product component 7 and is provided with screw holes that match the screws 10. The screw holes are evenly distributed along the circumference. The screws 10 are used to securely connect the outer ring of the component body 8, the outer conductive rubber pad 2, and the interface of the product component 7. This can further improve the reliability of the seal at the interface of the product component 7.

[0063] like Figure 2 As shown, the inner conductive rubber pad 5 is an annular gasket made of conductive rubber material. It is installed between the inner ring of the component body 8 and the interface of the product body 9. It matches the interface of the product body 9 and is provided with screw holes that match screws 10. The screw holes are evenly distributed along the circumference. Screws 10 are used to securely connect the inner ring of the component body 8, the outer conductive rubber pad 2, and the interface of the product body 9. This can further improve the reliability of the seal at the interface of the product body 9.

Claims

1. A flexible connection assembly for airtight and electromagnetic shielding airborne products, characterized in that: It includes a component body (8) and a screw (10); The component body (8) is a whole, a rotating body along the center line, and is divided into three parts: an inner ring, a flexible part, and an outer ring; the inner and outer surfaces are sprayed with conductive rubber, and the interior is composed of three parts: a metal inner pressure ring (1), a flexible sheet (3), and a metal outer pressure ring (4); Conductive rubber is sprayed on the inner and outer surfaces of the component body (8); The component body (8) is fixedly connected to the product body (9) and the product component (7) by screws (10); the cross-sections of the inner and outer surfaces of the flexible portion along the center line of the component body (8) are both arcs, the inner surface arc is tangent to the interface between the metal inner pressure ring (1) and the flexible sheet (3), and the radius of the inner surface arc is r, r=8~12mm; the outer surface arc is a quarter circle, the outer surface arc is tangent to the interface between the flexible sheet (3) and the product component (7), and the radius of the outer surface arc is the sum of the inner surface arc radius r and the thickness of the flexible sheet (3); The metal inner pressure ring (1) is located inside the inner ring portion, and the metal outer pressure ring (4) is located inside the outer ring portion; The metal inner pressure ring (1) is located inside the component body (8), and the metal outer pressure ring (4) is located outside the component body (8); The metal inner pressure ring (1) and the metal outer pressure ring (4) are both in the shape of a circular ring; The metal inner pressure ring (1) and the metal outer pressure ring (4) are both bonded to the flexible sheet (3); The metal inner pressure ring (1) and the metal outer pressure ring (4) are both made of aluminum alloy; The flexible sheet (3) is a composite material with a layered structure, consisting of a rubber layer and a textile layer, wherein the rubber layer and the textile layer are spaced apart, and the outer layer is a rubber layer; the number of textile layers is n, where n=1 or 2, and the number of rubber layers is n+1; the rubber layer is bonded to the textile layer, the thickness of a single rubber layer is 1.8-2.0 mm, and the thickness of a single textile layer is 0.5-0.8 mm; the material of the textile layer is a textile material.

2. The flexible connection assembly for airtight and electromagnetic shielding airborne products according to claim 1, characterized in that: In the component body (8), the non-bonded surfaces of the metal inner pressure ring (1) and the metal outer pressure ring (4) are also coated with rubber, and the coated rubber is a coating rubber layer; the coating rubber layer and the metal inner pressure ring (1) and the metal outer pressure ring (4) are bonded together at the contact surface; The covering rubber layer is formed by extending and turning over the rubber layer of the flexible sheet (3) that is in close contact with the metal inner pressure ring (1) and the metal outer pressure ring (4).

3. The flexible connection assembly for airtight and electromagnetic shielding airborne products according to claim 2, characterized in that: It also includes an outer conductive rubber pad (2) and an inner conductive rubber pad (5); The outer conductive rubber pad (2) is an annular gasket made of conductive rubber material, installed between the outer ring of the component body (8) and the interface of the product component (7), matching the interface of the product component (7), and provided with screw holes matching the screws (10). The screw holes are evenly distributed along the circumference, and the outer ring of the component body (8), the outer conductive rubber pad (2), and the interface of the product component (7) are fixedly connected by the screws (10); The inner conductive rubber pad (5) is an annular gasket made of conductive rubber material, installed between the inner ring of the component body (8) and the interface of the product body (9), matching the interface of the product body (9), and provided with screw holes matching the screws (10). The screw holes are evenly distributed along the circumference, and the inner ring of the component body (8), the outer conductive rubber pad (2), and the interface of the product body (9) are fixedly connected by the screws (10).

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