a thermal insulation pad

Abstract

The invention provides a heat insulation pad, which is located between the low-temperature component and the high-temperature component, and includes an upper titanium alloy cap, a polyimide column, and a lower titanium alloy cap. The structure can be that the polyimide column is embedded in the upper titanium alloy cap It can also be realized by embedding the upper titanium alloy cap and the lower titanium alloy cap in the polyimide column, and realize the fixed connection by screws. When there is no force, the upper titanium alloy cap and the lower titanium alloy cap There is a gap between the caps, and after the screw is tightened according to 80% of the pre-tightening force, the gap value between the upper titanium alloy cap and the lower titanium alloy cap is 0. The heat insulation pad of this application adopts a composite structure heat insulation pad of titanium alloy and polyimide, provides rigidity through titanium alloy, keeps the structure size stable, provides thermal resistance through polyimide and the separation interface, and finally realizes the heat insulation pad. Large thermal resistance, high stiffness, high dimensional stability.

Description

Technical field [0001] The present invention relates to the field of spatial thermal control technology, and more particularly to a heat insulating pad. Background technique [0002] The Star Sensitizer is a high-precision spatial attitude measuring device with stars as a high-precision space. In mapping cameras or detailed cameras, the geometric positioning accuracy of the remote sensing image of the space camera needs to be integrated with the spatial camera. To ensure the measurement accuracy of the Star Sensor, the horizontal working temperature level of the star sensor is required to be around 10 ° C, while the space camera operating temperature level is generally 20 ° C. Therefore, the installation interface of the Star Sensor and the camera needs to take heat insulation to ensure the temperature levels of both. [0003] In general, a heat-insulating pad made of a low thermal conductivity material is often used in a space environment, and there is a commonly used insulating...

AI Technical Summary

Problems solved by technology

The rigidity and stability of titanium alloy meet the requirements, but the heat insulation efficiency is low, and it is difficult to meet the target requirements in a limited space

Polyimide and FRP have poor rigidity and poor stability, and it is difficult to meet the pointing stability requirements of star sensors

Therefore, it is not suitable to use a single material heat insulation pad as a heat insulation pad between the star sensor and the camera in the traditional way

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