Air inflation axial sealing device used in vacuum environment

A technology of axial sealing and vacuum environment, which is applied in the direction of engine sealing, measuring devices, aerodynamic tests, etc., can solve the problems of time-consuming and labor-intensive, reducing the service life of bellows, and the small adjustment distance of bellows, so as to reduce investment and The effect of operating cost, reducing labor intensity and improving replacement efficiency

Inactive Publication Date: 2016-06-22
中国空气动力研究与发展中心超高速空气动力研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 poten

Method used

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  • Air inflation axial sealing device used in vacuum environment
  • Air inflation axial sealing device used in vacuum environment
  • Air inflation axial sealing device used in vacuum environment

Examples

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Example Embodiment

[0043] Example 1

[0044] An inflatable axial sealing device used in a vacuum environment, such as figure 2 As shown, it includes an inflatable sealing ring 9, a sealing cylinder 10, an adapter sleeve 11, a pressure gauge 12, a valve 13, an inflation pipe 14 and an air compressor 15, in which an inflatable sealing ring 9, a sealing cylinder 10 and an adapter sleeve The barrel 11 is an axisymmetric structure, which is illustrated by a two-dimensional cross-sectional view in the drawings;

[0045] The inflatable sealing ring 9 is installed in the groove of the adapter sleeve 11, and it is ensured that the sealing ring 9 will not fall off at will in the inflated or non-inflated state. It can be installed by means of glue or slot; inflating the inflatable sealing ring 9 The interface fits well with the inflation interface of the adapter sleeve 11; the inflation sealing ring 9 is in a non-inflated state during the entire installation process, see attached image 3 ;

[0046] The adapter...

Example Embodiment

[0057] Example 2

[0058] The air-filled axial sealing device of the present invention has been used in the Φ1m hypersonic wind tunnel of the China Aerodynamics Research and Development Center for sealing between the nozzle and the test section. The outer diameter of the nozzle is about Φ1.1m, and it is a curved surface, so a straight sealing cylinder with an outer diameter of about Φ1.2m is welded to the outer wall of the nozzle, and the inner diameter of the adapter sleeve is about Φ1.2m.

[0059] As attached Image 6 (The inflatable axial sealing device 17 in the figure is attached figure 2 The components of the inflatable axial sealing device are connected as shown in), the operation steps of using the inflatable axial sealing device Φ1m hypersonic wind tunnel with different Mach number nozzles are as follows:

[0060] 1. Deflate the inflatable sealing ring 9 of the inflatable axial sealing device 17, the inflatable sealing ring 9 is automatically retracted into the groove of t...

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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...

Claims

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Application Information

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IPC IPC(8): F16J15/46G01M9/04
CPCF16J15/46G01M9/04
Inventor 范孝华孙启志朱涛孟祥润吴斌许晓斌杨波吕超
Owner 中国空气动力研究与发展中心超高速空气动力研究所
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