Framework type high-pressure-bearing high-temperature-resistant protective cover

Abstract

The skeleton type high-pressure-bearing high-temperature-resistant protective cover comprises a rear cover body and a skeleton sealing plate tightly attached to the inner end face of the rear cover body, and high-temperature-resistant rubber is bonded to the outer end face of the rear cover body; the framework sealing plate is in a grid shape, a pressing frame is arranged on the circumference of the framework sealing plate in an attached mode, and a sealing ring is further arranged on the framework sealing plate in a matched mode. The framework type high-pressure-bearing high-temperature-resistant protective cover meets the requirements of sealing and pressure maintaining during daily storage and transportation of the aircraft, when the aircraft is launched, the rear cover is broken and opened along the designed weak groove position, the high-temperature-resistant rubber is bonded to the outer side face of the rear cover body, the function of preventing ablation of the adjacent cylinder protective cover is achieved, and meanwhile the metal framework can achieve the high-pressure-bearing function.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical design and manufacturing, and specifically relates to a skeleton-type high-pressure and high-temperature resistant protective cover. Background Art

[0002] Currently, more and more aircraft and storage and transportation boxes are connected in clusters. As a result, separated cover fragments may fly out of the launched cylinder and hit other surrounding equipment. During launch, the high-temperature gas flow may burn the adjacent cylinder protective cover. The existence of these problems makes it more urgent to meet the requirements for high temperature resistance and high pressure bearing performance of the protective cover.

[0003] The Chinese invention patent with publication number CN118458128A discloses a large pressure ratio shock wave opening sealing cover, which increases the ratio of the reverse pressure to the positive opening force, and solves the technical problem that the storage and transportation box sealing cover is damaged and ineffective under the scouring of the aircraft launch tail flame because the reverse pressure of the storage and transportation box sealing cover is close to the positive opening force. However, the protective cover cannot prevent the adjacent barrel protective cover from ablation.

[0004] Therefore, it is necessary to develop a protective cover which can meet the requirements of sealing and pressure maintenance during daily storage and transportation of the aircraft. When the aircraft is launched, the protective cover breaks open along the designed weak groove position, which not only plays the role of preventing ablation of the adjacent cylinder protective cover, but also achieves the purpose of high pressure resistance. Summary of the invention

[0005] In order to solve the above problems, the present invention aims to provide a skeleton-type high-pressure and high-temperature resistant protective cover.

[0006] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: a skeleton-type high-pressure-bearing and high-temperature-resistant protective cover, comprising a rear cover body, a skeleton sealing plate tightly fitted on the inner end surface of the rear cover body, and a high-temperature-resistant rubber bonded to the outer end surface of the rear cover body;

[0007] The skeleton sealing plate is in a grid shape, a pressing frame is arranged on the circumference of the skeleton sealing plate, and a sealing ring is also provided on the skeleton sealing plate.

[0008] Furthermore, the side end surface of the rear cover body in contact with the frame sealing plate is a supporting surface, and the pressing frame acts on the supporting surface of the rear cover body and is locked with the frame sealing plate.

[0009] Furthermore, the rear cover body is provided with weakening grooves, including a cross-shaped radial weakening groove opened on the outer end surface of the rear cover body and a circumferential weakening groove opened on the inner end surface of the rear cover body.

[0010] Furthermore, the depths of the circumferential weakening groove and the radial weakening groove are both 12 mm, and the angles are both 60°.

[0011] Preferably, the pressing frame is fixed to the skeleton sealing plate by means of mounting screws.

[0012] Preferably, the height of the cover body is 22 mm.

[0013] Preferably, the skeleton sealing plate is a metal skeleton.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The protective cover is broken open along the designed weak groove position, and the high temperature resistant rubber is bonded to the outer side of the rear cover body to prevent the adjacent barrel protective cover from ablation. The skeleton sealing plate fits tightly with the rear cover body to prevent the rear cover fragments from flying out of the launched barrel and hitting other surrounding equipment.

[0016] 2. The pure mechanical structure has high reliability, good integrity and light weight. The sealing and pressure-maintaining function is achieved through the sealing ring. When the aircraft is launched, the gas flow flows out from the grid spaces set on the skeleton sealing plate. The metal skeleton can achieve the purpose of high pressure bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A three-dimensional diagram of the skeleton-type high-pressure and high-temperature resistant protective cover of the present invention;

[0019] Figure 2 for Figure 1 A-direction view;

[0020] Figure 3 for Figure 1 A front cross-sectional view of

[0021] Figure 4 for Figure 1 Axis view of

[0022] In the figure, 1-rear cover body; 2-pressure frame; 3-skeleton sealing plate; 4-high temperature resistant rubber; 5-mounting screws; 6-sealing ring; A-radial weakened groove; B-circumferential weakened groove. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0024] Reference Figure 1-Figure 4 A skeleton-type high-pressure and high-temperature resistant protective cover is mainly composed of a rear cover body 1, a pressure frame 2, a skeleton sealing plate 3, a high-temperature resistant rubber 4, a mounting screw 5 and a sealing ring 6. This protective cover can realize the sealing and pressure-maintaining function through the sealing ring 6 during the storage and transportation of the aircraft. When the aircraft is launched, the rear cover body 1 is broken and opened along the designed weak groove position under the action of the engine gas, and the gas flow flows out from the grid space set on the skeleton sealing plate 3. After the launch, the skeleton sealing plate 3 is still connected to the rear flange of the cylinder and does not fall off. The high-temperature resistant rubber 4 is bonded to the outer side of the rear cover body 1 to play the role of preventing the adjacent cylinder protective cover from ablation. The high-temperature resistant rubber 4 does not affect the opening of the rear cover body 1. The skeleton sealing plate 3 is tightly fitted with the rear cover body 1. On the one hand, it is to increase the negative pressure to be borne, and on the other hand, it is to prevent the fragments of the rear cover from flying out of the launched cylinder and hitting other surrounding equipment.

[0025] The contact surface of the rear cover body 1 and the frame sealing plate 3 is a supporting surface, and a pressing frame 2 is also provided on the frame sealing plate 3 , and the pressing frame 2 is used to lock the supporting surface of the rear cover body 1 on the frame sealing plate 3 .

[0026] The height of the back cover body 1 is 22 mm. The back cover body 1 is provided with weakening grooves, including a cross-shaped radial weakening groove A provided on the outer end surface of the back cover body 1 and a circumferential weakening groove B provided on the inner end surface of the back cover body 1. The depth of the circumferential weakening groove B and the radial weakening groove A are both 12 mm, and the angle is 60°.

[0027] The positive pressure of the rear cover body itself is 200kpa, and the negative pressure it can withstand is not less than 1.5MPa. This type of protective cover can meet the sealing and pressure maintenance requirements of the aircraft during daily storage and transportation. It is a mechanical skeleton-type high-pressure and high-temperature resistant protective cover with a simple structure, fast response, and high reliability. The skeleton-type high-pressure and high-temperature resistant protective cover meets the sealing and pressure maintenance requirements of the aircraft during daily storage and transportation. When the aircraft is launched, the rear cover breaks open along the designed weak groove position. The high-temperature resistant rubber is bonded to the outer side of the rear cover body to play the role of anti-ablation of the adjacent barrel protective cover. At the same time, the metal skeleton can play a high-pressure bearing role.

[0028] The above is a detailed introduction to a skeleton-type high-pressure and high-temperature resistant protective cover provided by the present invention. This article uses specific examples to illustrate the structure and working principle of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A skeleton-type high-pressure and high-temperature resistant protective cover, characterized in that: It comprises a rear cover body (1), a frame sealing plate (3) tightly fitted on the inner end surface of the rear cover body (1), and a high temperature resistant rubber (4) bonded to the outer end surface of the rear cover body (1); The skeleton sealing plate (3) is in a grid shape, a pressing frame (2) is arranged in close contact with the circumference of the skeleton sealing plate (3), and a sealing ring (6) is also arranged on the skeleton sealing plate (3).

2. The skeleton-type high-pressure and high-temperature resistant protective cover according to claim 1 is characterized in that: The side end surface of the rear cover body (1) in contact with the frame sealing plate (3) is a supporting surface, and the pressing frame (2) acts on the supporting surface of the rear cover body (1) and is locked with the frame sealing plate (3).

3. The skeleton-type high-pressure and high-temperature resistant protective cover according to claim 1 is characterized in that: The rear cover body (1) is provided with weakening grooves, including a cross-shaped radial weakening groove (A) opened on the outer end surface of the rear cover body (1) and a circumferential weakening groove (B) opened on the inner end surface of the rear cover body (1).

4. The skeleton-type high-pressure and high-temperature resistant protective cover according to claim 3 is characterized in that: The depth of the circumferential weakening groove (B) and the radial weakening groove (A) are both 12 mm, and the angle is 60°.

5. The skeleton-type high-pressure and high-temperature resistant protective cover according to claim 1 is characterized in that: The pressing frame (2) is fixed on the framework sealing plate (3) by means of mounting screws (5).

6. The skeleton-type high-pressure and high-temperature resistant protective cover according to claim 1 is characterized in that: The height of the cover body (1) is 22 mm.

7. The skeleton-type high-pressure and high-temperature resistant protective cover according to claim 1 is characterized in that: The frame sealing plate (3) is a metal frame.

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