A shock wave-activated seal cover with a large pressure-bearing ratio

Abstract

The present application relates to a shock-wave-activated sealing cover with a large pressure-bearing ratio, which comprises an outer ring, a top block, multiple flap bodies and a functional layer. The top block is arranged inside the outer ring, and the multiple flap bodies are attached between the top block and the outer ring along the circumferential direction of the top block, and the top block and the multiple flap bodies form a spherical arch. The functional layer is bonded to the outer surfaces of the top block, the multiple flap bodies and the outer ring. By arranging the top block inside the outer ring, the multiple flap bodies are attached between the top block and the outer ring along the circumferential direction of the top block, the top block and the multiple flap bodies form a spherical arch, and the functional layer is bonded to the outer surfaces of the top block, the multiple flap bodies and the outer ring, when the force is applied from the outside to the inside, the top block, the multiple flap bodies and the outer ring are mutually extruded and constrained, and can withstand a large pressure. When the force is applied from the inside to the outside, the top block and the multiple flap bodies are mutually separated, and a relatively small pressure can break through the sealing cover, solving the technical problem in the related art that the reverse pressure-bearing capacity of the sealing cover is close to the forward opening force, and the insufficient reverse pressure-bearing capacity will cause the sealing cover to be damaged and fail under the scouring of the tail flame.

Description

Technical Field

[0001] This application relates to the technical field of aircraft, and particularly relates to a shock-wave-activated sealing cover with a large pressure-bearing ratio. Background Art

[0002] Currently, an aircraft storage, transportation, and launch box can store an aircraft and transport it to a set position. The sealing cover of the storage, transportation, and launch box is an important part of the storage, transportation, and launch box. The sealing cover of the storage, transportation, and launch box is required to be rainproof and dustproof during storage and transportation, and can be smoothly broken open by relying on the shock-wave effect generated by the aircraft during launch. At the same time, it does not affect the flight and subsequent use of the aircraft, and does not cause damage to the aircraft body.

[0003] In related technologies, the ratio of the reverse pressure-bearing capacity to the forward opening force of the current sealing cover of the storage, transportation, and launch box is relatively close. Generally, a weak part is set at the radial position of the sealing cover of the storage, transportation, and launch box, so that the sealing cover of the storage, transportation, and launch box is easy to break when stressed. However, insufficient reverse pressure-bearing capacity will cause the sealing cover of the storage, transportation, and launch box to be damaged and fail under the scouring of the aircraft launch tail flame.

[0004] Therefore, it is necessary to design a new shock-wave-activated sealing cover with a large pressure-bearing ratio to overcome the above problems. Summary of the Invention

[0005] This application provides a shock-wave-activated sealing cover with a large pressure-bearing ratio, which can solve the technical problem that in related technologies, the reverse pressure-bearing capacity of the sealing cover of the storage, transportation, and launch box is relatively close to the forward opening force, and insufficient reverse pressure-bearing capacity will cause the sealing cover of the storage, transportation, and launch box to be damaged and fail under the scouring of the aircraft launch tail flame.

[0006] In a first aspect, an embodiment of this application provides a shock-wave-activated sealing cover with a large pressure-bearing ratio, which includes: an outer ring, a top block, multiple flap bodies, and a functional layer. The top block is arranged inside the outer ring. Multiple flap bodies are attached between the top block and the outer ring along the circumferential direction of the top block, and the top block and the multiple flap bodies form a spherical arch; the functional layer is bonded to the outer surfaces of the top block, the multiple flap bodies, and the outer ring.

[0007] Among them, the large pressure ratio shock opening seal cover is installed at the front end of the storage, transportation and launch box. The pressure that the large pressure ratio shock opening seal cover bears from the inside out is the forward opening force, and the pressure that the large pressure ratio shock opening seal cover bears from the outside in is the reverse bearing pressure. The top block is arranged inside the outer ring. A plurality of the flap bodies are attached between the top block and the outer ring along the circumferential direction of the top block. The functional layer is bonded to the outer surfaces of the top block, the plurality of flap bodies and the outer ring. The outer ring, the plurality of flap bodies and the top block form a spherical arch structure, so that the functional layer is stressed when receiving the reverse bearing pressure. The outer ring, the plurality of flap bodies and the top block are mutually extruded and constrained, so that the reverse bearing pressure is decomposed into the internal stress of the material and the bottom support force, enabling the large pressure ratio shock opening seal cover to withstand a large pressure. When receiving the forward opening force, the functional layer is stressed, the top block and the plurality of flap bodies are separated from each other, so that the forward opening force is the shear force of the functional layer. Under the action of a small forward opening force, the large pressure ratio shock opening seal cover is broken, enabling the top block and the plurality of flap bodies to fly out and complete the forward opening, increasing the ratio of the reverse bearing pressure to the forward opening force. Among them, the forward opening force can be directionally designed through the thickness of the functional layer. The reverse bearing pressure is related to the structural strength of the large pressure ratio shock opening seal cover and is proportional to the thickness of the large pressure ratio shock opening seal cover. The thickness of the large pressure ratio shock opening seal cover can be set to more than 10 times the thickness of the functional layer, so as to ensure that the ratio of the reverse bearing pressure to the forward opening force is greater than 10.

[0008] Combined with the first aspect, in an embodiment, the top block is set as a cylindrical structure. The top surface of the top block is set as a spherical surface, the bottom surface of the top block is set as a concave arc surface, and the side surface of the top block is inclined along the circumferential direction to form a first wedge structure. Each flap body is provided with a second wedge structure. The first wedge structure and the second wedge structure are mutually attached, so that the top block and the plurality of flap bodies are assembled into a spherical arch.

[0009] Among them, the top block is set as a cylindrical structure, the top surface of the top block is set as a spherical surface, the bottom surface of the top block is set as a concave arc surface, the spherical surface and the multiple valve bodies form a complete spherical surface, and the concave arc surface can converge the shock wave, causing the top block to generate a concentrated opening force, so that the functional layer is damaged at the fracture point b, realizing the forward opening of the pressure-bearing ratio shock wave to open the sealing cover. The side surface of the top block is inclined along the circumferential direction to form a first wedge structure, so that one end of each valve body is supported at the position of the top block. Each valve body is provided with the second wedge structure. The first wedge structure and the second wedge structure are mutually attached, so that the top block and the multiple valve bodies are assembled into a spherical arch, so that the multiple valve bodies are attached to the circumferential direction of the top block between the top block and the outer ring, so that the top block and the multiple valve bodies form a whole, improving the assembly accuracy of the large pressure-bearing ratio shock wave to open the sealing cover.

[0010] Combined with the first aspect, in an embodiment, the outer side surface of the first wedge structure includes a first inclined surface, and the included angle between the first inclined surface and the horizontal direction is set as an acute angle, and the first inclined surface is attached to the outer side surface of the second wedge structure.

[0011] Among them, the included angle α between the first inclined surface and the horizontal direction is set as an acute angle. When the large pressure-bearing ratio shock wave opens and is stressed from the outside to the inside, the valve body restricts the linear inward movement of the top block. At the same time, the outer ring and the top block jointly restrict the inward flipping movement of the valve body under the action of the bottom surface support, making the whole structure of the large pressure-bearing ratio shock wave opening the sealing cover tend to be tight, decomposing the reverse bearing pressure into the internal stress of the top block and the multiple valve bodies and the supporting force of the outer ring, and improving the overall bearing capacity of the large pressure-bearing ratio shock wave opening the sealing cover; when the large pressure-bearing ratio shock wave opens and is stressed from the inside to the outside, the outer ring, the top block and the multiple valve bodies are only attached without other connections. The top block moves forward in the positive direction, and the multiple valve bodies rotate towards the periphery. The first wedge structure does not affect the rotation of the multiple valve bodies. The outward movement of the top block and the multiple valve bodies does not interfere with each other. The forward opening force is only the shear force of the functional layer. The included angle α between the first inclined surface and the horizontal direction is calculated according to the linear distance R between the flipping point a and the fracture point b and the plane distance h between the flipping point a and the fracture point b: In other embodiments, a convex block may protrude from the side of the first wedge structure close to the second wedge structure, and the outer side surface of the convex block is attached to the outer side surface of the second wedge structure.

[0012] In combination with the first aspect, in one embodiment, the outer ring is arranged in a rectangular ring shape; four of the flap bodies are arranged inside the outer ring, and each of the flap bodies has a turning point a and a fitting surface located at the two ends of its diagonal respectively. The turning points a of the four flap bodies are respectively installed at the four corner positions of the outer ring, and the fitting surfaces of the four flap bodies are in contact with the top block.

[0013] Among them, the outer ring is arranged in a rectangular ring shape, four of the flap bodies are arranged inside the outer ring, the outer shapes of the four flap bodies match the outer shape of the outer ring, each of the flap bodies has a turning point a and a fitting surface located at the two ends of its diagonal respectively, the turning points a of the four flap bodies respectively correspond to the four corner positions of the outer ring, and the fracture point b of the high large-pressure-ratio shock wave opening seal cover corresponds to the function layer at the connection between the top block and multiple flap bodies, that is, the top end of the fitting surface.

[0014] In combination with the first aspect, in one embodiment, symmetric triangular weight-reducing grooves are arranged on the inner side of the flap body, so that convex ribs are formed between the triangular weight-reducing grooves on the inner side of the flap body, and the convex ribs of multiple flap bodies form an arched reinforcing skeleton structure arranged in a cross shape.

[0015] Among them, two of the triangular weight-reducing grooves are arranged on the inner side of the flap body, and the triangular weight-reducing grooves are symmetrically arranged along the diagonal of the flap body, so that while ensuring the rigidity and strength of the flap body, its weight is greatly reduced, convex ribs are formed between the triangular weight-reducing grooves on the inner side of the flap body, and the convex ribs of multiple flap bodies form an arched reinforcing skeleton structure arranged in a cross shape along the diagonal and the cross center line, so that the high large-pressure-ratio shock wave opening seal cover can be effectively supported when bearing a large reverse bearing pressure.

[0016] In combination with the first aspect, in one embodiment, the outer ring is arranged in a rectangular ring shape, a second inclined surface is arranged on the inner side surface of the outer ring, and the second inclined surface is in contact with the outer side surface of the flap body, and the included angle between the second inclined surface and the vertical direction is within 10°.

[0017] Among them, the outer ring can be arranged in a rectangular ring shape so that the outer ring is matched with the port of the storage, transportation and launch box. The second inclined surface is arranged on the inner side surface of the outer ring, and the second inclined surface is in contact with the outer side surface of the flap body. The included angle θ between the second inclined surface and the vertical direction can be set within 10°, so as to avoid excessive deformation or damage of the outer ring when it is stressed. At the same time, the second inclined surface is matched with the first inclined surface, so that the top block and multiple flap bodies can not only be squeezed against each other and tend to be close when bearing reverse pressure, but also move outward without interference when opening in the forward direction.

[0018] In combination with the first aspect, in one embodiment, the outer ring is provided with a plurality of screw mounting holes.

[0019] Among them, a plurality of the screw mounting holes are provided on the outer ring, so that the shock wave opening seal cover with a large pressure-bearing ratio can be installed at the front end of the storage, transportation and launch box. When the engine ignites to generate a gas flow during the launch of the aircraft, the gas flow impacts the rear seal cover to generate a shock wave. The shock wave propagates forward along the inner wall of the storage, transportation and launch box and breaks through the shock wave opening seal cover with a large pressure-bearing ratio, causing multiple pieces of the petal body and the top block to fly forward, while the outer ring remains on the storage, transportation and launch box.

[0020] In combination with the first aspect, in an embodiment, a sealing ring mounting groove is circumferentially provided on one side of the outer ring.

[0021] Among them, the sealing ring mounting groove is circumferentially provided on one side of the outer ring, and a sealing ring is installed in the sealing ring mounting groove, so that the outer ring is hermetically connected to the storage, transportation and launch box, ensuring the sealing performance between the shock wave opening seal cover with a large pressure-bearing ratio and the storage, transportation and launch box. The sealing ring can be made of silicone rubber material.

[0022] In combination with the first aspect, in an embodiment, the material strength of the functional layer is greater than the material strength of the top block and the petal body.

[0023] Among them, the material strength of the functional layer is greater than the material strength of the top block and the petal body, so that the overall material strength of the shock wave opening seal cover with a large pressure-bearing ratio is relatively large. The functional layer is made of an anti-ablation material, so that the shock wave opening seal cover with a large pressure-bearing ratio can withstand the erosion and ablation of the gas flow generated during the launch of the aircraft without affecting subsequent use.

[0024] In combination with the first aspect, in an embodiment, both the petal body and the top block are made of non-metallic lightweight materials.

[0025] Among them, both the petal body and the top block are made of non-metallic lightweight materials, such as foaming materials, etc. At the same time, triangular weight-reducing grooves are provided on the bottom surface of the petal body, so that the weight of the shock wave opening seal cover with a large pressure-bearing ratio is reduced, ensuring the lightweight of the entire device. After the shock wave opening seal cover with a large pressure-bearing ratio is broken, it will not affect the subsequent launch of the aircraft and will not cause damage to the ground equipment. The weight of the shock wave opening seal cover with a large pressure-bearing ratio is about 30% lighter than that of the known seal cover.

[0026] The beneficial effects brought by the technical solutions provided in the embodiments of the present application include:

[0027] By arranging a top block inside the outer ring, multiple flap bodies are attached along the circumferential direction of the top block between the top block and the outer ring. The top block and the multiple flap bodies form a spherical arch, and the functional layer is bonded to the outer surfaces of the top block, the multiple flap bodies, and the outer ring. When the force is applied from the outside to the inside, the functional layer is stressed, and at the same time, the top block, the multiple flap bodies, and the outer ring are mutually extruded and constrained, so that a relatively large pressure can be borne. When the force is applied from the inside to the outside, the functional layer is stressed, and the top block and the multiple flap bodies are separated from each other. A relatively small pressure can break the sealing cover, increasing the ratio of the reverse bearing pressure to the forward opening force, and solving the technical problem in the related art that the reverse bearing pressure of the storage and transportation and launch box sealing cover is relatively close to the forward opening force, and the insufficient reverse bearing pressure will cause the storage and transportation and launch box sealing cover to be damaged and fail under the erosion of the tail flame of the aircraft launch. Brief Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1 Structural schematic diagram of the large bearing ratio shock wave opening sealing cover removing the functional layer and one flap body provided by the embodiment of the present application;

[0030] Figure 2 Front structural schematic diagram of a large bearing ratio shock wave opening sealing cover provided by the embodiment of the present application;

[0031] Figure 3 Cross-sectional view of a large bearing ratio shock wave opening sealing cover provided by the embodiment of the present application;

[0032] Figure 4 Front structural schematic diagram of one flap body provided by the embodiment of the present application;

[0033] Figure 5 Reverse structural schematic diagram of one flap body provided by the embodiment of the present application;

[0034] Figure 6 Reverse structural schematic diagram of a large bearing ratio shock wave opening sealing cover provided by the embodiment of the present application;

[0035] Figure 7 Cross-sectional view of one flap body provided by the embodiment of the present application.

[0036] In the figure: 1. Outer ring; 11. Second inclined surface; 12. Screw mounting hole; 2. Top block; 21. First inclined surface; 3. Flap body; 4. Functional layer; a. Flipping point; b. Fracture point. Detailed Embodiment

[0037] To enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without making creative efforts shall fall within the scope of protection of this application.

[0038] The embodiment of this application provides a shock wave opening seal cover with a large pressure-bearing ratio, which can solve the technical problem that the reverse bearing pressure of the storage, transportation and launch box seal cover is relatively close to the forward opening force, and insufficient reverse bearing pressure will cause the storage, transportation and launch box seal cover to be damaged and fail under the scouring of the rocket launch tail flame.

[0039] See Figure 1 and Figure 2 As shown in and, this application provides a shock wave opening seal cover with a large pressure-bearing ratio, which includes: an outer ring 1, a top block 2, multiple flap bodies 3 and a functional layer 4. The top block 2 is arranged inside the outer ring 1, and multiple flap bodies 3 are attached between the top block 2 and the outer ring 1 along the circumferential direction of the top block 2, and the top block 2 and multiple flap bodies 3 form a spherical arch; the functional layer 4 is bonded to the outer surfaces of the top block 2, multiple flap bodies 3 and the outer ring 1.

[0040] In this embodiment, the shock-opening seal cover with a large pressure-bearing ratio is installed at the front end of the storage, transportation and launch box. The pressure that the shock-opening seal cover with a large pressure-bearing ratio bears from the inside to the outside is the forward opening force, and the pressure that the shock-opening seal cover with a large pressure-bearing ratio bears from the outside to the inside is the reverse bearing pressure. The top block 2 is arranged inside the outer ring 1, and a plurality of the flap bodies 3 are attached between the top block 2 and the outer ring 1 along the circumferential direction of the top block 2. The functional layer 4 is bonded to the outer surfaces of the top block 2, the plurality of flap bodies 3 and the outer ring 1. The outer ring 1, the plurality of flap bodies 3 and the top block 2 form a spherical arch structure, so that the functional layer 4 is stressed when receiving the reverse bearing pressure. The outer ring 1, the plurality of flap bodies 3 and the top block 2 are mutually extruded and constrained, so that the reverse bearing pressure is decomposed into the internal stress of the material and the bottom support force, enabling the shock-opening seal cover with a large pressure-bearing ratio to withstand a large pressure. When receiving the forward opening force, the functional layer 4 is stressed, and the top block 2 and the plurality of flap bodies 3 are separated from each other, so that the forward opening force becomes the shear force of the functional layer 4. Under the action of a small forward opening force, the shock-opening seal cover with a large pressure-bearing ratio breaks, enabling the top block 2 and the plurality of flap bodies 3 to fly out and complete the forward opening, increasing the ratio of the reverse bearing pressure to the forward opening force. Among them, the forward opening force can be directionally designed through the thickness of the functional layer 4. The reverse bearing pressure is related to the structural strength of the shock-opening seal cover with a large pressure-bearing ratio and is directly proportional to the thickness of the shock-opening seal cover with a large pressure-bearing ratio. The thickness of the shock-opening seal cover with a large pressure-bearing ratio can be set to more than 10 times the thickness of the functional layer 4, so as to ensure that the ratio of the reverse bearing pressure to the forward opening force is greater than 10.

[0041] In this embodiment, by arranging the top block 2 inside the outer ring 1, a plurality of the flap bodies 3 are attached between the top block 2 and the outer ring 1 along the circumferential direction of the top block 2. The top block 2 and the plurality of flap bodies 3 form a spherical arch. The functional layer 4 is bonded to the outer surfaces of the top block 2, the plurality of flap bodies 3 and the outer ring 1, so that the functional layer 4 is stressed when receiving force from the outside to the inside. At the same time, the top block 2, the plurality of flap bodies 3 and the outer ring 1 are mutually extruded and constrained, so that the reverse bearing pressure is decomposed into the internal stress of the material and the bottom support force, enabling the shock-opening seal cover with a large pressure-bearing ratio to withstand a large pressure. When receiving force from the inside to the outside, the functional layer 4 is stressed, and the top block 2 and the plurality of flap bodies 3 are separated from each other, so that the forward opening force becomes the shear force of the functional layer 4. A relatively small pressure can break the shock-opening seal cover with a large pressure-bearing ratio, increasing the ratio of the reverse bearing pressure to the forward opening force, and solving the technical problem in the related art that the reverse bearing pressure and the forward opening force of the storage, transportation and launch box seal cover are relatively close, and insufficient reverse bearing pressure will cause the storage, transportation and launch box seal cover to be damaged and fail under the scouring of the rocket engine exhaust flame during the launch of the aircraft.

[0042] Further, referring to Figure 1 、Figure 3 and Figure 6 As shown in Figure 6 , in some embodiments, the top block 2 is provided with a cylindrical structure, the top surface of the top block 2 is provided with a spherical surface, the bottom surface of the top block 2 is provided with a concave arc surface, the side surface of the top block 2 is inclined in the circumferential direction to form a first wedge structure, each petal body 3 is provided with a second wedge structure, and the first wedge structure and the second wedge structure are mutually attached to form a spherical arch by the top block 2 and multiple petal bodies 3.

[0043] In this embodiment, the top block 2 is provided with a cylindrical structure, the top surface of the top block 2 is provided with a spherical surface, the bottom surface of the top block 2 is provided with a concave arc surface, the spherical surface and multiple petal bodies 3 form a complete spherical surface, the concave arc surface can converge the shock wave, so that the top block 2 generates a concentrated opening force, so that the functional layer 4 is damaged at the fracture point b, realizing the forward opening of the pressure-bearing ratio shock wave to open the sealing cover. The side surface of the top block 2 is inclined in the circumferential direction to form a first wedge structure, so that one end of each petal body 3 is supported at the position of the top block 2. Each petal body 3 is provided with the second wedge structure, and the first wedge structure and the second wedge structure are mutually attached to form a spherical arch by the top block 2 and multiple petal bodies 3, so that multiple petal bodies 3 are attached to the circumference of the top block 2 between the top block 2 and the outer ring 1, and the top block 2 and multiple petal bodies 3 form a whole, improving the assembly accuracy of the large pressure-bearing ratio shock wave to open the sealing cover.

[0044] Further, referring to Figure 3 and Figure 7 As shown in Figure 7 , in some embodiments, the outer side surface of the first wedge structure includes a first inclined surface 21, the included angle between the first inclined surface 21 and the horizontal direction is set as an acute angle, and the first inclined surface 21 is attached to the outer side surface of the second wedge structure.

[0045] In this embodiment, the included angle α between the first inclined surface 21 and the horizontal direction is set as an acute angle. When the large pressure-bearing ratio shock wave opens the seal and is stressed from the outside to the inside, the flap body 3 restricts the linear inward movement of the top block 2. At the same time, the outer ring 1 and the top block 2 jointly restrict the inward flipping movement of the flap body 3 under the action of the bottom surface support, making the entire structure of the large pressure-bearing ratio shock wave opening seal tend to be tight. The reverse bearing pressure is decomposed into the internal stress of the top block 2 and multiple flap bodies 3 and the supporting force of the outer ring 1, improving the overall pressure-bearing capacity of the large pressure-bearing ratio shock wave opening seal cover. When the large pressure-bearing ratio shock wave opens the seal and is stressed from the inside to the outside, the outer ring 1, the top block 2 and multiple flap bodies 3 only fit together without other connections. The top block 2 moves in the positive direction, and multiple flap bodies 3 rotate towards the periphery. The first wedge-shaped structure does not affect the rotation of multiple flap bodies 3, and the outward movement of the top block 2 and multiple flap bodies 3 does not interfere with each other. The positive opening force is only the shear force of the functional layer 4. The included angle α between the first inclined surface 21 and the horizontal direction is calculated based on the straight-line distance R between the flipping point a and the breaking point b and the planar distance h between the flipping point a and the breaking point b: In other embodiments, a convex block may protrude from the side of the first wedge-shaped structure close to the second wedge-shaped structure, and the outer side surface of the convex block fits the outer side surface of the second wedge-shaped structure.

[0046] Further, referring to Figure 1 、 Figure 6 and Figure 7 As shown, in some embodiments, the outer ring 1 is set as a rectangular ring; four flap bodies 3 are arranged inside the outer ring 1, and each flap body 3 has a flipping point a and a fitting surface located at both ends of its diagonal. The flipping points a of the four flap bodies 3 are respectively installed at the four corners of the outer ring 1, and the fitting surfaces of the four flap bodies 3 are in contact with the top block 2.

[0047] In this embodiment, the outer ring 1 is set as a rectangular ring, and four flap bodies 3 are arranged inside the outer ring 1. The outer shapes of the four flap bodies 3 match the outer shape of the outer ring 1. Each flap body 3 has a flipping point a and a fitting surface located at both ends of its diagonal. The flipping points a of the four flap bodies 3 respectively correspond to the four corners of the outer ring 1. The breaking point b of the large pressure-bearing ratio shock wave opening seal cover corresponds to the position of the functional layer 4 at the connection between the top block 2 and multiple flap bodies 3, that is, the top of the fitting surface.

[0048] Further, referring to Figure 5 and Figure 6 As shown, in some embodiments, symmetric triangular weight-reducing grooves are arranged on the inner side of the flap body 3, so that convex ribs are formed between the triangular weight-reducing grooves on the inner side of the flap body 3, and the convex ribs of multiple flap bodies 3 form an arched reinforcing skeleton structure arranged in a cross shape.

[0049] In this embodiment, two triangular weight-reducing grooves are arranged on the inner side of the petal body 3, and the triangular weight-reducing grooves are symmetrically arranged along the diagonal lines of the petal body 3, so that the petal body 3 can ensure its rigidity while greatly reducing its weight, and convex ribs are formed on the inner side of the petal body 3 between the triangular weight-reducing grooves, so that the convex ribs of multiple petal bodies 3 form a cross-arranged arched reinforced skeleton structure along the diagonal lines and the cross center line, so that the large pressure ratio shock wave opening sealing cover can be effectively supported when it is subjected to a large reverse bearing pressure.

[0050] Further, see Figure 1 , Figure 3 and Figure 7 As shown, in some embodiments, the outer ring 1 is set to a rectangular ring shape, and the inner side surface of the outer ring 1 is provided with a second inclined surface 11, and the second inclined surface 11 is in contact with the outer side surface of the petal body 3, and the angle between the second inclined surface 11 and the vertical direction is within 10°. In this embodiment, the outer ring 1 can be set to a rectangular ring shape, so that the outer ring 1 is matched with the port of the storage and transportation box, and the inner side surface of the outer ring 1 is provided with the second inclined surface 11, and the second inclined surface 11 is in contact with the outer side surface of the petal body 3, and the angle θ between the second inclined surface 11 and the vertical direction can be set within 10° to prevent the outer ring 1 from being deformed or damaged due to excessive force. At the same time, the second inclined surface 11 cooperates with the first inclined surface 21, so that the top block 2 and the plurality of petal bodies 3 can be squeezed against each other and tend to be close when the reverse pressure is applied, and can also move outward without interfering with each other when the forward opening is performed.

[0051] Further, see Figure 2 and Figure 3 As shown, in some embodiments, the outer ring 1 is provided with a plurality of screw mounting holes 12. In this embodiment, the outer ring 1 is provided with a plurality of the screw mounting holes 12, so that the large pressure ratio shock wave opening sealing cover can be installed at the front end of the storage and transportation box. When the aircraft is launched, the engine ignites to generate a gas flow, and the gas flow impacts the rear sealing cover to generate a shock wave, and the shock wave propagates forward along the inner wall of the storage and transportation box, and breaks through the large pressure ratio shock wave opening sealing cover, so that multiple pieces of the petal body 3 and the top block 2 fly forward, while the outer ring 1 remains on the storage and transportation box.

[0052] Further, see Figure 6 As shown, in some embodiments, a sealing ring installation groove is circumferentially provided on one side of the outer ring 1. In this embodiment, the sealing ring installation groove is circumferentially provided on one side of the outer ring 1, and a sealing ring is installed in the sealing ring installation groove, so that the outer ring 1 is sealed and connected with the storage and transportation box, ensuring the sealing performance of the large pressure ratio shock wave opening sealing cover and the storage and transportation box, and the sealing ring can be made of silicone rubber material.

[0053] Further, referring to Figure 1 and Figure 2 As shown, in some embodiments, the material strength of the functional layer 4 is greater than that of the top block 2 and the flap body 3. In this embodiment, the material strength of the functional layer 4 is greater than that of the top block 2 and the flap body 3, making the overall material strength of the high-pressure-ratio shock-activated sealing cover relatively large. The functional layer 4 is made of an anti-ablative material, enabling the high-pressure-ratio shock-activated sealing cover to withstand the gas flow erosion and ablation generated during the launch of the aircraft without affecting subsequent use.

[0054] Further, referring to Figure 1 As shown, in some embodiments, both the flap body 3 and the top block 2 are made of non-metallic lightweight materials. In this embodiment, both the flap body 3 and the top block 2 are made of non-metallic lightweight materials, such as foaming materials. At the same time, triangular weight-reducing grooves are provided on the bottom surface of the flap body 3, reducing the weight of the high-pressure-ratio shock-activated sealing cover, ensuring the lightweight of the entire device, and ensuring that the high-pressure-ratio shock-activated sealing cover will not affect the subsequent launch of the aircraft and will not damage ground equipment after breaking. The weight of the high-pressure-ratio shock-activated sealing cover is approximately 30% lighter than that of the known sealing cover.

[0055] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0056] It should be noted that in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0057] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A shock-wave-activated sealing cover with a large pressure-bearing ratio, characterized in that It includes: An outer ring (1); The top block (2) and multiple flap bodies (3), the top block (2) is arranged inside the outer ring (1), and multiple said flap bodies (3) are attached between the top block (2) and the outer ring (1) along the circumferential direction of the top block (2). The top block (2) is set as a cylindrical structure, the top surface of the top block (2) is set as a spherical surface, the bottom surface of the top block (2) is set as a concave arc surface, the side surface of the top block (2) is inclined along the circumferential direction to form a first wedge-shaped structure, and each flap body (3) is provided with a second wedge-shaped structure. The first wedge-shaped structure and the second wedge-shaped structure are mutually attached, so that the top block (2) and multiple said flap bodies (3) are assembled into a spherical arch. The outer side surface of the first wedge-shaped structure includes a first inclined surface (21), and the first inclined surface (21) extends obliquely upward in the direction close to the flap body (3). The included angle α between the first inclined surface (21) and the horizontal direction is set as an acute angle, where α is calculated according to the linear distance R between the flipping point a and the breaking point b and the planar distance h between the flipping point a and the breaking point b: α = sin -1 (R / h); A second inclined surface (11) is provided on the inner side surface of the outer ring (1), and the second inclined surface (11) extends obliquely upward in a direction approaching the valve body (3), wherein the angle between the second inclined surface (11) and the vertical direction is within 10°; the second wedge-shaped structure on one side of each valve body (3) fits against the first inclined surface (21), and the opposite side of each valve body (3) fits against the second inclined surface (11); A functional layer (4), and the functional layer (4) is bonded to the outer surfaces of the top block (2), multiple valve bodies (3) and the outer ring (1).

2. The large pressure ratio shock wave opening seal cover according to claim 1, characterized in that The outer ring (1) is arranged as a rectangular ring; four valve bodies (3) are arranged inside the outer ring (1), and each valve body (3) has a turning point a and a fitting surface located at both ends of its diagonal respectively. The turning points a of the four valve bodies (3) are respectively installed at the four corner positions of the outer ring (1), and the fitting surfaces of the four valve bodies (3) are in contact with the top block (2).

3. The large pressure-bearing ratio shock wave opening seal cover according to claim 1, characterized in that, Symmetrically arranged triangular weight reduction grooves are provided on the inner side of the valve body (3), so that a rib is formed between the triangular weight reduction grooves on the inner side of the valve body (3), and the ribs of multiple valve bodies (3) form an arched strengthening skeleton structure arranged in a cross pattern.

4. The large pressure-bearing ratio shock wave opening seal cover according to claim 1, characterized in that, The outer ring (1) is provided with a plurality of screw mounting holes (12).

5. The shock wave opening seal cover with a large pressure bearing ratio according to claim 1, characterized in that A seal ring mounting groove is arranged along the circumference on one side of the outer ring (1).

6. The large pressure ratio shock wave opening seal cover according to claim 1, characterized in that The material strength of the functional layer (4) is greater than the material strength of the top block (2) and the valve body (3).

7. The shock-wave activated seal cover with a large pressure-bearing ratio according to claim 1, characterized in that, Both the valve body (3) and the top block (2) are made of non-metallic lightweight materials.

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