Wave-absorbing and temperature-controlled external heat flow simulation device in thermal vacuum environment

Abstract

The invention provides a wave-absorbing temperature control type external heat flow simulating device under a thermal vacuum environment. The wave-absorbing temperature control type external heat flow simulating device comprises a structural silicon carbide wave-absorbing component 1, a temperature control system 2, a wave-absorbing box 3 and a fixing mounting plate 4. The fixing mounting plate 4 is connected to the inner surface of the wave-absorbing box 3. The temperature control system 2 is disposed between the wave-absorbing box 3 and the fixing mounting plate 4 and connected with the fixing mounting plate 4. The structural silicon carbide wave-absorbing component 1 is connected to the inner surface of the fixing mounting plate 4. The wave-absorbing temperature control type external heat flow simulating device under the thermal vacuum environment has the advantages that the device integrates a thermal heat flow simulating function and a wave-absorbing function, microwaves can be prevented from reflecting back to the surface of a product effectively, vacuum thermal test simulation can be performed under a real on-track thermal coupling state, and test reliability is increased.

Description

technical field [0001] The invention relates to the technical field of external heat flow simulation in a vacuum environment, in particular to a wave-absorbing and temperature-controlling external heat flow simulation device in a thermal vacuum environment. Background technique [0002] Before the spacecraft is launched, it needs to conduct a vacuum thermal test under the background of space cold and black in the ground space environment simulation equipment. The heat sink, infrared heating cage, infrared lamp array and test tooling in the ground space environment simulation equipment are all made of metal materials, which have a good reflection effect on microwaves. In the absence of any measures, the spacecraft products directly emit microwaves in the space environment simulation equipment, and a large proportion must be reflected back to the surface of the spacecraft products. If the reflected microwave power exceeds a certain amount, the spacecraft may be blocked. The p...

AI Technical Summary

Problems solved by technology

[0003] 1) With the complexity of the new generation of spacecraft products, the products are getting smaller and smaller, and the refitting work is more difficult. Even if it can be refitted, due to the small and fragile structure, the products in the refitting process face unpredictable risks, and the status before and after refitting is difficult to guarantee

The complexity of the new generation of products under pre-research is greatly increased, and the modification of the product is unacceptable or impossible. Therefore, it is difficult to meet the needs of microwave testing in the vacuum thermal test for the current modified spacecraft;

[0004] 2) The spacecraft product is connected to a wired load, resulting in inconsistent product test status and on-orbit working status; the microwave power of the product is absorbed by the load, and because about 22% of the microwave radiation energy is converted into heat energy on the load, the thermal state of the product is distorted and cannot be inspected Influence of Thermal Effects on Product Thermal Design

If only the vacuum thermal test is carried out in the current wired load mode, the coupling effect between the products will disappear, and the performance of the product cannot be fully assessed. Therefore, when the spacecraft thermal balance or thermal vacuum test is performed, the working mode of the on-orbit working state must be adopted. , so that the thermal control design and reliability can be assessed more comprehensively

Images