Air inflation axial sealing device used in vacuum environment

Abstract

The invention belongs to the field of hypersonic wind tunnels, and relates to an inflatable axial sealing device used in a vacuum environment, which includes an inflatable sealing ring, a sealing cylinder, an adapter sleeve, an inflating pipeline and an air compressor, wherein the inflatable sealing ring, the sealing The sealing cylinder body and the adapter sleeve have an axisymmetric structure; the inflatable sealing ring is installed in the groove of the adapter sleeve, and the inflatable interface of the inflatable sealing ring cooperates with the inflatable interface of the adapter sleeve; the sealing cylinder enters the adapter sleeve Inside, the sealing ring can fully contact the outer surface of the sealing cylinder after being inflated; the inflation pipe connects the air compressor and the inflation port of the inflatable sealing ring. The inflatable axial sealing device of the present invention solves the shortcomings of the bellows connection mode, reduces investment and operating costs, reduces labor intensity and difficulty in replacing pipeline equipment, improves the efficiency of pipeline equipment replacement, and obtains a good vibration isolation effect, which can be applied to Axial vacuum seal between pipeline equipment of different calibers.

Description

technical field [0001] The invention belongs to the field of hypersonic wind tunnels, and relates to an inflatable axial sealing device used in a vacuum environment. Background technique [0002] At present, conventional hypersonic wind tunnel equipment operates in a wide range of Mach numbers (for example, the Mach number range of a Φ1-meter hypersonic wind tunnel is M3-M10), and the wind tunnel body involved in nozzle replacement consists of fixed equipment 1, stable section 2, The nozzle 3 to be replaced, the nozzle 4 to be replaced, the bellows 5 and the test section 6 are sequentially formed. A Mach number corresponds to a set of nozzles. In order to facilitate the frequent replacement of nozzles, vacuum sealing and vibration reduction, bellows are mostly used to connect the test section and nozzles. figure 1 shown. [0003] When the bellows connection method is used, the steps to replace the nozzle are as follows: [0004] 1. Disassemble the connecting bolts between...

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Problems solved by technology

[0017] 1) The investment cost of the bellows equipment is high, and the bellows are frequently compressed during equipment replacement, which reduces the service life of the bellows, and the cost of replacing a damaged bellows is high and the period is long;

[0018] 2) Two people need to compress the bellows at the same time to replace the nozzle. For equipment with a high height (L), it is necessary to set up a platform to compress the bellows, which is time-consuming, laborious, inefficient, and has potential safety hazards;

[0019] 3) The maximum compression distance of the bellows is generally less than 50mm. For large-scale equipment disassembly, the adjustment distance of the bellows is too small, and the space during disassembly is limited, resulting in high hoisting requirements and easy to cause collision damage to the end face of the equipment;

[0020] 4) The bellows itself has a certain rigidity. For equipment with high vibration isolation requirements, the bellows have poor vibration isolation effect

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