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High temperature resistant thermal insulation structure capable of preventing vibration and temperature shock

A high-temperature and vibration-resistant technology, used in film/sheet adhesives, adhesives, etc., can solve the problems of easy expansion, falling off, easy falling off, etc., to achieve strong resistance to vibration and temperature shock, easy installation and maintenance. Process performance, good thermal insulation effect

Active Publication Date: 2018-07-20
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fiber cotton is easy to crush and fall off. It is easy to expand, become brittle and crack under the action of engine vibration and high and low temperature alternating impact. After a period of use, it will debond and fall off from the protected part, losing the effect of heat insulation protection.

Method used

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  • High temperature resistant thermal insulation structure capable of preventing vibration and temperature shock
  • High temperature resistant thermal insulation structure capable of preventing vibration and temperature shock

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] See attached figure 1 As shown, this kind of anti-vibration and temperature shock-resistant high-temperature heat insulation structure is a three-layer structure, which is the surface protection layer 1, the heat insulation layer 2, and the adhesive layer 3 from the outside to the inside, in which:

[0021] The surface protection layer 1 is made of reinforced fabric compounded with liquid rubber, the mass ratio of the reinforced fabric to the liquid rubber is 1:10, the reinforced fabric is high silica fiber cloth, and the liquid rubber is room temperature vulcanized silicone rubber .

[0022] The heat insulation layer 2 is a tubular fiber product formed of a mixture of quartz fiber and alumina fiber compounded with an adhesive.

[0023] The adhesive of the bonding layer 3 is a silicone resin-based adhesive.

[0024] The high-temperature-resistant heat-insulation structure resistant to vibration and temperature shock installs and fixes the heat-insulating layer 2 on th...

Embodiment 2

[0027] See attached figure 2 As shown, this kind of anti-vibration and temperature shock-resistant high-temperature heat insulation structure is a three-layer plate structure, which is the surface protection layer 1, the heat insulation layer 2, and the adhesive layer 3 from the outside to the inside, in which:

[0028] The surface protection layer 1 is made of reinforced fabric compounded with liquid rubber, the mass ratio of the reinforced fabric to the liquid rubber is 1:10, the reinforced fabric is high silica fiber cloth, and the liquid rubber is room temperature vulcanized silicone rubber .

[0029] The heat insulation layer 2 is a plate-shaped fiber product formed of high silica fiber composite adhesive.

[0030] The adhesive for the bonding layer 3 is an epoxy-modified silicone resin-based adhesive.

[0031] The high-temperature-resistant and heat-insulating structure that is resistant to vibration and temperature shocks installs and fixes the heat-insulating layer ...

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Abstract

The invention discloses a high temperature resistant thermal insulation structure capable of preventing vibration and temperature shock. The structure comprises three layers from outer to inner: (1) asurface protection layer, (2) a thermal insulation layer, and (3) a bonding layer. The thermal insulation structure can be fixed on the surface of a structure or a basic material, which needs thermalinsulation, through an adhesive. Enhanced fabric composite liquid rubber is painted on the surface of the thermal insulation material to protect the surface. The structure has the advantages that thestructure is simple, the thermal insulation effect is good, the performance on resisting vibration and temperature shock is strong, and the installation and maintenance performance is good at the same time.

Description

technical field [0001] The invention relates to a high-temperature-resistant and heat-insulating structure resistant to vibration and temperature impact, and belongs to the technical field of structural materials. Background technique [0002] With the continuous improvement of the power of the aero-engine, the high-temperature gas from the combustion chamber flows along the flow path to the tail nozzle, and the temperature gradually decreases, but it is still as high as hundreds of degrees Celsius. Due to the limited space of the power turbine casing and other parts adjacent to the tail nozzle, the distance between the inner wall and the outer wall is only a few millimeters. The high-temperature inner wall forms a strong heat transfer to the outer wall, which seriously threatens the reliability of the system and affects the tactical use of the aircraft. [0003] Traditional technology usually uses pure fiber cotton or simply uses fiber cloth to wrap fiber cotton for heat in...

Claims

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Application Information

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IPC IPC(8): C09J7/21C09J7/22C09J7/20
CPCC09J2400/22
Inventor 王恒芝吴娜范召东王利娜张鹏
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS