Vacuum cabin dynamic seal structure under high vibration frequency

Abstract

The invention provides a vacuum cabin dynamic seal structure under high vibration frequency. The vacuum cabin dynamic seal structure comprises a connecting part, a vibration table transferring tool and sealing assemblies, wherein the connecting part is fixedly connected with the wall of a vacuum cabin and is provided with a central through hole and a plurality of through grooves, the through grooves are formed in the wall of the central through hole in the circumferential direction, the vibrating table transfer connecting tool penetrates through the central through hole of the connecting partand is connected with a vibration table outside the vacuum cabin, and openings are formed in the sides, adjacent to the vibration table transfer connecting tool, of the through grooves, the sealing assemblies are arranged in the through grooves and are used for realizing sealing between the vibration table transfer connecting tool before and after a thermal vibration test. The dynamic seal structure has the advantages that the service life is longer, the reliability is higher, energy consumption is lower, and the problem that the vacuum cabin seal structure under the high vibration frequency fails easily is solved.

Description

technical field [0001] The invention belongs to the sealing application field of test equipment under comprehensive environmental conditions, and relates to a dynamic sealing structure of a vacuum chamber under high vibration frequency. Background technique [0002] As the Mach number of the aircraft is getting higher and higher, the corresponding aerodynamic heating problem is becoming more and more serious, and its local maximum temperature can reach more than 1400°C, which also puts forward very high technical requirements for the thermal test of the ground environment structure. Facing the harsh aerodynamic heating environment, it is often accompanied by severe vibration, which will cause dislocation, separation and shedding of heat insulation materials or heat-proof structures, affecting heat insulation performance and normal flight. Therefore, it is necessary to carry out thermal vibration coupling environmental tests. To test the anti-vibration ability of the heat-pro...

AI Technical Summary

Problems solved by technology

For this reason, a large amount of flushing oil and cooling water must be consumed, resulting in high operating costs, high energy consumption, poor sealing reliability, low safety, and high maintenance costs.

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