Inner support device for air tightness test of composite material cylinder

Abstract

The invention discloses an inner supporting device for an air tightness test of a composite material cylinder. The inner supporting device comprises a left supporting piece, a right supporting piece and a supporting rod arranged between the left supporting piece and the right supporting piece. A threaded hole is formed in the middle of the left supporting piece. A limiting groove is formed in the inner bottom face of the right supporting piece. One end of the supporting rod is connected with the threaded hole and the other end is inserted into the limiting groove. According to the inner supporting device for the airtightness test of the composite material barrel, the inner wall of the barrel is provided with the all-position inner supporting device, manual adjustment is achieved, it is guaranteed that the inner diameter difference value generated due to the change of the machining precision of the barrel is not affected, it is guaranteed that abnormal deformation does not exist in the circumferential direction of the barrel, and then the airtightness of the middle layer of the composite material barrel can be detected.

Description

technical field [0001] The invention belongs to the field of vacuum technology, and in particular relates to an inner support device for an air tightness test of a composite material cylinder. Background technique [0002] Composite materials are widely used in engineering because of their high specific modulus, specific strength, and good designability, including common composite pressure vessels and high-speed rotating cylindrical shells. These composite cylindrical shells provide sufficient strength At the same time, the special conditions and environment of its application should also be considered. There are often special substances inside, which requires the composite cylindrical shell itself to have strict sealing performance to isolate it from the outside world. Therefore, in the early stage of application, combined with the special substances to be stored, the airtightness of the composite material needs to be tested. [0003] Composite materials have a multi-layer...

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Problems solved by technology

[0004] However, in the actual test process, if the overall airtightness of the cylinder is intact and the airtightness of the innermost layer of the cylinder is poor, how to prove whether there is air leakage in the multi-angle layer in the middle of the cylinder is an unsolved problem

Consider removing the outer composite material of the cylinder under a lathe or milling machine to expose the multi-angle layer to indicate whether the layer is leaking. However, the composite material cylinder itself has tension, and the remaining part of the cylinder will shrink when the outer layer is removed. , or cause cracks or micro-cracks to appear in the original normal cylinder structure, so that when the air tightness test is performed again, it cannot be proved that the air leakage phenomenon is the cracking caused by the initial damage or processing

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