Thermal protection device

Abstract

The invention discloses a thermal protection device which comprises an upper panel, a bottom panel, an upper corrugated plate layer and a lower corrugated plate layer, wherein the upper corrugated plate layer comprises a plurality of upper corrugated plates which are arranged in sequence; the lower corrugated plate layer comprises a plurality of lower corrugated plates which are arranged in sequence; the upper corrugated plate layer is arranged above the lower corrugated plate layer; the upper and lower corrugated plate layers are arranged in a staggered manner; the lower ends of the at the upper part corrugated plates and the upper ends of the lower corrugated plates are connected with one another through a heat insulation and bearing bolt connection structure; the heat insulation and bearing bolt connection structure comprises joint bolts, upper heat insulation gaskets, middle heat insulation spacers, lower heat insulation gaskets, and connecting nuts; the gap between the upper panel and the lower ends of the upper corrugated plates is filled with a high-temperature resistant insulating material; the gap between the bottom panel and the upper ends of the lower corrugated plates is filled with a middle-temperature resistant insulating material. Due to the adoption of the thermal protection device provided by the invention, the problems of thermal short-circuiting of the connection structure and thermal mismatch of a cold-hot structure of the thermal protection device can be solved.

Description

technical field [0001] The invention relates to the technical field of thermal protection of hypersonic aircraft technology, in particular to a thermal protection device. Background technique [0002] The thermal protection system is located outside the fuselage of a hypersonic vehicle, and is used to prevent the temperature of the fuselage and internal structure from exceeding the temperature limit that can be tolerated, forming a protective outer layer and bearing a certain load. The thermal protection system is a key subsystem to ensure the flight safety of a hypersonic vehicle, and it is also a key system to achieve weight reduction of the fuselage. [0003] In the prior art, the heat protection system generally adopts traditional heat-insulating tiles, heat-insulating blankets and other devices for heat protection. Conventional heat shields, although light in weight, have weak mechanical properties and poor maintainability of adhesive connections. In addition, the met...

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Problems solved by technology

[0006] In view of this, the present invention provides a thermal protection device, which can solve the problem of the thermal short circuit of the connecting structure and the thermal mismatch of the cold and hot structures in the thermal protection device

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