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A method for repairing inner heat insulation layer

A technology of heat insulation layer and heat insulation pad, which is applied in the direction of aerospace vehicle heat protection device, aerospace safety/emergency device, fuselage insulation, etc., and can solve the difficulty of removing and laying the inner heat insulation layer Problems such as poor thermal performance and easy falling off of the repaired structure achieve the effect of reducing the repairing workload, making repairs convenient, and improving the strength and appearance quality

Active Publication Date: 2019-11-22
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 overall heat insulation effect of the inner heat insulation layer repaired by this repair method is good, but the repair process is complicated, especially after a large number of components are installed inside the equipment, it is more difficult to remove and lay the inner heat insulation layer; The damaged part of the heat insulation layer is directly filled with heat insulation material for repair. This repair method is simple and fast, but the overall heat insulation performance of the inner heat insulation layer after repair is poor, and the repaired part is prone to heat leakage, and the repair structure is easy to fall off, forming a problem inside the equipment. excess

Method used

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  • A method for repairing inner heat insulation layer

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Effect test

Embodiment 1

[0046]Completely clean the heat insulation layer at the damaged position, and remove the residual adhesive layer on the metal surface. The thickness of the heat insulation layer is 13mm, and the damaged length is 18mm, and the damaged width is 10mm. Metal surfaces are grit blasted and then wiped clean with acetone. After drying, apply surface treatment agent KH550 on the metal surface and the overlapping surface, and then apply silicone rubber adhesive, the thickness of the adhesive layer is 0.2mm. Cut the heat insulation material for filling according to the size and shape of the damaged part and the overlapping method, and fill it in the damaged part, and then use the gap heat insulation material to heat-insulate and seal the gap between the heat insulation layers. The gap heat insulation material is made of silicone rubber Adhesive, glass hollow microspheres with a particle size of 75 μm and glass fibers with a diameter of 7 μm and a length of 5 mm, with a mass ratio of 10...

Embodiment 7

[0050] Completely clean the heat insulation layer at the damaged position, and remove the residual adhesive layer on the metal surface. The thickness of the heat insulation layer is 21mm, and the damaged length is 35mm, and the damaged width is 40mm. When repairing, the step lap method is used, and the lap joint surface is repaired into three lap steps. The inclined face joint method is used, and the thickness of the step is 6mm. , the width is 12mm, the angle of the step slope is 30°, the metal surface is sandblasted with expanded silicon particles with a particle size of 200μm at an air pressure of 0.55MPa, and then wiped clean with acetone. After drying, apply the surface treatment agent TG-27 on the metal surface and the overlapping surface, and then apply the silicone rubber adhesive, the thickness of the adhesive layer is 0.1mm. Cut the heat insulation material according to the size and shape of the damaged part and the overlapping method, and fill it in the gap, and the...

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Abstract

The invention provides a repairing method of an inner heat insulating layer. By trimming the damaged portion of the inner heat insulating layer, machining the to-be-repaired contact face of the innerheat insulating layer, machining the inner heat insulating layer for repairing and filling, performing surface treatment, using a gap heat insulation material to perform gap filling, adhering a sealing heat insulation pad to the joint position of the to-be-repaired surface, and adhering two-side polytetrafluoroethylene to treat varnished glass cloth and the like to achieve repairing of the inner heat insulation layer. According to the repairing method of the inner heat insulating layer, repairing is convenient, repairing can be performed just trimming the inner heat insulation layer at the damaged position, it is not needed to disassemble and replace a whole heat insulating module, and therefore influences by devices in equipment are avoided, and the repairing difficulty and the repairingworkload are reduced.

Description

technical field [0001] The invention relates to a method for repairing an inner heat insulation layer, and belongs to the technical field of heat insulation materials. Background technique [0002] With the increasing awareness of energy saving and environmental protection, and the continuous expansion of human activities, heat insulation technology has attracted more and more attention, and is widely used in aviation, aerospace and other fields. Silicone rubber has unique high and low temperature resistance, corrosion resistance, radiation resistance and other characteristics, and also has excellent electrical insulation, water resistance and weather resistance. The foam prepared by it has excellent properties such as light weight, heat insulation, sound insulation and impact resistance, and will become a hot spot for the development of heat insulation materials in the future. [0003] Since silicone rubber foam is not rigid enough to be used as an outer insulation, it is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C73/00B29C73/04B29C73/26B64C1/40B64G1/58
CPCB29C73/00B29C73/04B29C73/26B29C2073/262B64C1/40B64G1/58
Inventor 赵小玲邹军锋刘斌侯少华冯鹏
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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