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Thermal protection structure and preparation method thereof

A thermal protection structure and technology for thermal protection, applied in chemical instruments and methods, thermal protection devices for aerospace vehicles, metal layered products, etc., can solve problems such as difficulty in meeting thermal protection requirements, and achieve excellent thermal protection performance, recovery Thermal protection performance, to achieve the effect of repeated use

Active Publication Date: 2022-01-28
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect of this patented design is that by providing an inner part called the heat insulting protective layers or shells on top of the air conditioner's interior space, they have good thermal barrier capabilities for maintaining optimal temperatures during flight operations. This makes them suitable for reuse when needed without requiring maintenance over time. Additionally, there are also features like coolant supply systems used within the system itself, allowing users to adjust how much liquid crystal material needs to absorb enough cold water from outside sources while still keeping their internal parts warm properly.

Problems solved by technology

This patented describes how current methods of protecting against damage caused during low altitude flights involve adding layers between different parts inside the body of the object being protected. While some previous solutions were able to perform well under certain conditions but could still cause significant issues if applied outside these specific environments where temperature changes frequently occur.

Method used

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  • Thermal protection structure and preparation method thereof
  • Thermal protection structure and preparation method thereof
  • Thermal protection structure and preparation method thereof

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preparation example Construction

[0073] Such as figure 2 Shown, the present invention also provides a kind of preparation method of thermal protection structure, comprising:

[0074]placing the temperature-sensitive hydrogel and the porous heat-insulating structure in a container containing a cooling working fluid, so that the temperature-sensitive hydrogel enters the porous heat-insulating structure; wherein, the temperature of the cooling working medium is a first preset temperature , at the first preset temperature, the thermosensitive hydrogel is in a deswelling state;

[0075] The temperature of the cooling working fluid is reduced to a second preset temperature, so that the cooling working fluid is adsorbed in the temperature-sensitive hydrogel in the form of a solid phase to obtain a thermal insulation layer; wherein, at the second preset temperature, The thermosensitive hydrogel is in a swollen state;

[0076] The heat insulation layer and the skin are fixed, and a cavity layer is arranged between ...

Embodiment 1

[0091] The temperature-sensitive hydrogel and the porous alumina ceramic plate of 100 mm × 100 mm × 8 mm are placed in a container containing distilled water, so that the temperature-sensitive hydrogel enters the porous alumina ceramic plate; wherein, the temperature of the distilled water is 36 ℃, the temperature-sensitive hydrogel is in a deswelling state;

[0092] Lowering the temperature of the distilled water to 25°C, so that the distilled water is adsorbed in the thermosensitive hydrogel in the form of a solid phase to obtain a thermal insulation layer; wherein, the thermosensitive hydrogel is in a swollen state;

[0093] The heat insulation layer, the skin and the bottom plate are fixed by the cooperation of screws and nuts to obtain the bottom plate of the heat protection structure. Among them, the skin is made of 100mm×100mm×5mm superalloy plate, the bottom plate is made of 100mm×100mm×5mm aluminum alloy plate, and the screws and nuts are made of M4 alumina ceramic sc...

Embodiment 2

[0096] The preparation method of embodiment 2 is basically the same as embodiment 1, the difference is:

[0097] The heat flux is 0.1MW / m 2 , The thickness of the porous alumina ceramic plate is 5mm.

[0098] The measured temperature of the outer surface of the skin is 420°C, and the effective time of the active thermal protection mechanism is 30 minutes.

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Abstract

The invention provides a thermal protection structure and a preparation method thereof. The thermal protection structure comprises a thermal insulation layer, a cavity layer and a skin which are sequentially arranged, wherein the thermal insulation layer is arranged on the outer surface of the inner cabin of an aircraft, the thermal insulation layer comprises a porous thermal insulation structure, a temperature-sensitive hydrogel arranged in the porous thermal insulation structure and a cooling working medium adsorbed in the temperature-sensitive hydrogel, when the thermal protection structure is not subjected to thermal protection, the temperature-sensitive hydrogel is in a swelling state and is used for adsorbing the cooling working medium into the temperature-sensitive hydrogel in a solid-phase existence form, and when the thermal protection structure carries out thermal protection, the temperature-sensitive hydrogel absorbs heat radiated inwards from the skin and the cavity layer so as to make the temperature-sensitive hydrogel be in a deswelling state, and is used for sequentially converting the existence form of the cooling working medium from a solid phase to a liquid phase and a gas phase, and discharging the gas-phase cooling working medium after being released to the cavity layer. The thermal protection structure provided by the invention has excellent thermal protection performance.

Description

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Claims

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Application Information

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Owner XIAMEN UNIV
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