Soft airbag for loading inner pressure on inner wall of cylinder

Abstract

The invention particularly relates to a soft airbag for loading inner pressure on an inner wall of a cylinder, belonging to the technical field of space environment strength. The airbag is a round-cake-shaped airbag composed of an upper end face, a lower end face and a side wall, wherein cloth strips are uniformly stuck between the upper and lower end faces in the airbag and two pipe nozzles are arranged on the upper end face; and a plurality of buckles are annularly stuck on the upper end face. The airbag is machined by adopting a PVC thin film. In a testing process, when cable and hose equipment need to be arranged on the inner wall of a test piece, a cable and a hose are required to pass through the airbag; an axial hole is formed in the center of the airbag; and a hard pipe penetrates into the hole. In a testing process, when different inner pressure loads are loaded at different heights of the test piece, the plurality of airbags are sequentially mounted in the axial direction; two hoses are led out from each airbag and are used for pressurizing and measuring pressure; and in a mounting process, the two hoses of the airbag on the upper side penetrate through the hard pipe at the center of the airbag on the lower side. The soft airbag for loading the inner pressure on the inner wall of the cylinder has light weight and low cost and is convenient to mount.

Description

technical field [0001] The invention belongs to the technical field of spaceflight environment strength, and in particular relates to a soft airbag that applies internal pressure to the inner wall of a cylinder. Background technique [0002] There are many structural components of the rocket subject to internal pressure loads, such as fairings, instrument cabins, inter-box sections, inter-stage sections, bellows, etc. These components require testing during development, design and production. The internal pressure test is to use gas or liquid as the stamping medium to simulate the design situation when the internal pressure of the rocket structure reaches the maximum in a certain working state. For example, when the rocket flies in the atmosphere, the instrument cabin and the truncated cone shells of the head bear the internal pressure formed by aerodynamic force. [0003] The traditional internal pressure realization method is to process an internal pressure cylinder with...

AI Technical Summary

Problems solved by technology

It can be seen that the traditional internal pressure realization method is cumbersome and costly, requiring a large amount of steel and natural rubber

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