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Gap treatment method for aerogel internal thermal insulating layer

A treatment method and aerogel technology, which are applied to offensive equipment, projectiles, self-propelled projectiles, etc., can solve the problem of poor processing technology of stepped lap joints, difficult and tight bonding of stepped lap joints, and affect the thermal insulation effect of the thermal insulation layer. and other problems, to achieve the effect of easy control of the thickness of the thermal insulation layer, ideal relative position of the composition, and ensuring the effect of gap treatment

Pending Publication Date: 2021-07-02
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of adopting this step-lapping method to deal with gaps are: 1) It is extremely difficult to process the forming mold of the curved surface and special-shaped structure in the form of step-lapping; The phenomenon of wear and delamination is serious; 3) The surface rigidity of the heat insulation layer in the airgel is relatively large, and the ladder lap gap on the side of the cabin section is not easy to bond tightly; 4) The processing technology of the ladder lap gap is poor, and it is easy to form a butt joint , leading to the formation of a heat flow path, which directly heats the air in the cabin and affects the overall heat insulation effect of the heat insulation layer

Method used

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  • Gap treatment method for aerogel internal thermal insulating layer
  • Gap treatment method for aerogel internal thermal insulating layer
  • Gap treatment method for aerogel internal thermal insulating layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A method for treating gaps in an airgel inner heat insulation layer, using the following process steps:

[0049] ①Pre-assemble a number of airgel inner heat insulation layers made of silica airgel on the inner surface of the cabin, and process inclined surfaces such as figure 2 As shown, the inclination angle α: 45°, the width of the gap between the thermal insulation layers in the airgel is determined to be about 1.5 mm.

[0050] ②According to the width of the gap between the thermal insulation layers in the airgel, the basalt fiber reinforced silica airgel material with a thickness of 2mm is selected as the gap filling thermal insulation material, and the gap filling thermal insulation material width is the same as that in the airgel. The slope of the heat insulation layer has the same width and the same length as the length of the slope of the heat insulation layer in the airgel.

[0051] ③Fill the gap with insulation material according to image 3 The extrusion f...

Embodiment 2

[0054] A method for treating gaps in an airgel inner heat insulation layer, using the following process steps:

[0055] ①Pre-assemble a number of airgel inner heat insulation layers made of silica airgel on the inner surface of the cabin, and process inclined surfaces such as figure 2 As shown, the inclination angle α: 45°, the width of the gap between the thermal insulation layers in the airgel is determined to be about 0.5 mm.

[0056] ②According to the width of the gap between the inner heat insulation layers of the airgel, the reinforced fiber gap treatment material made of basalt fiber with a thickness of 1mm is selected as the gap filling heat insulation material, and the width of the gap filling heat insulation material is equal to that of the airgel The slope of the inner heat insulation layer has the same width and the same length as the length of the slope of the airgel inner heat insulation layer.

[0057] ③Fill the gap with insulation material according to imag...

Embodiment 3

[0060] Embodiment 3 is basically the same as Embodiment 1, the difference is:

[0061] In step ①, a plurality of airgel inner heat insulation layers made of silica airgel are pre-assembled on the inner surface of the cabin, and the inclined surfaces are lapped as follows: figure 2 As shown, the inclination angle α: 20°, the width of the gap between the heat insulation layers in the airgel is determined to be about 1.5 mm. The gap treatment method is the same as that of Example 1.

[0062] The heat insulation performance of the sample prepared in Example 3 is not much different from the heat insulation performance of the sample prepared in Example 1, but the end of the inclined angle is easily damaged during processing, transportation, and handling, which affects the airgel interior. The integrity of the thermal insulation layer, thus affecting the thermal insulation effect of the overall inner thermal insulation layer.

[0063] The 20mm thick sample prepared in this example...

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Abstract

The invention relates to a gap treatment method for an aerogel internal thermal insulating layer. The method comprises the following step (1) of forming an integral thermal insulating layer through lap joint of a plurality of aerogel internal thermal insulating layers via inclined planes; the step (2) of determining the widths of lap joint gaps among the multiple aerogel internal thermal insulating layers, and selecting gap treatment materials according to the widths of the lap joint gaps; and the step (3) of filling the selected gap treatment materials in the lap joint gaps among the multiple aerogel internal thermal insulating layers, so that gap treatment of the aerogel internal thermal insulating layers is completed. According to the gap treatment method, in use, the aerogel internal thermal insulating layers are in lap joint through the inclined planes, the later filling process is easy to implement, and gaps can be filled with the thermal insulating materials; The method is simple in process and high in operability, and a good thermal insulating effect can be achieved through test verification.

Description

technical field [0001] The invention belongs to the technical field of functional composite materials, and in particular relates to a gap treatment technology when an airgel inner heat insulation layer is laid, in particular to a gap treatment method for an airgel inner heat insulation layer. Background technique [0002] With the development of supersonic missiles, traditional thermal protection materials are difficult to meet the harsh aerodynamic heating environment outside the missile body and the heating of the missile body's own equipment. It is necessary to use an airgel inner heat insulation layer with better heat insulation effect as thermal protection. The function of the material is to effectively prevent heat from entering the interior of the cabin when the missile is flying at supersonic speed for a long time, so as to maintain a lower temperature in the cabin and ensure the normal operation of equipment and instruments. [0003] The gaps between the traditional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42B15/34
CPCF42B15/34
Inventor 王军辉权成杨洁颖周玉贵王子宁张昊
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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