Complex structure corrugated pipe

Abstract

The invention discloses a complex structure corrugated pipe. The complex structure corrugated pipe comprises a metal corrugated pipe, a rubber inner layer and a rubber outer layer, wherein the metal corrugated pipe is formed by machining corrugations on a thin-wall steel pipe; the rubber inner layer is wrapped on the outer wall of the metal corrugated pipe; and the rubber outer layer is wrapped onthe outer wall of the rubber inner layer. The rubber layers of the complex structure corrugated pipe are closely combined with the corrugated pipe. Damping is high. Vibration of the corrugated pipe is reduced. Vibration parameters of the corrugated pipe are reduced. The anti-fatigue-cracking service life of the corrugated pipe is prolonged. The defect that the corrugated pipe cracks easily is overcome. Besides, when having cracks, the complex structure corrugated pipe can continuously achieve the normal delivery function with the aid of the sealing effect of the rubber layers and the secondary protective effect, prevent serious secondary faults that leakage of the substances such as oil, air and water delivered in the corrugated pipe causes fires, the performance is reduced and machines and equipment cannot operate, gain time for subsequent use and maintenance and minimize the fault influence.

Description

technical field [0001] The invention relates to the field of engine structural pipe fittings, in particular to a composite structure bellows. Background technique [0002] The existing metal bellows are thin-walled steel pipes (commonly used as 0.3, 0.4 thick stainless steel and other materials) processed by hydroforming, mechanical spinning and other processes. A few original microcracks are generated in the process, because the microcracks may not expose the leakage or leakage in time during the leak test and debugging stage, but the microcracks will further expand after running for a period of time and vibration, and finally penetrate the pipe wall, causing the bellows to crack; or There is vibration in the engine and other equipment during use. After a period of use, the thin-walled bellows will cause material fatigue failure and cracking due to vibration; this is a common bellows failure mode. [0003] The information disclosed in this Background section is only for en...

AI Technical Summary

Problems solved by technology

[0002] The existing metal bellows are thin-walled steel pipes (commonly used as 0.3, 0.4 thick stainless steel and other materials) processed by hydroforming, mechanical spinning and other processes. A few original microcracks are generated in the process, because the microcracks may not expose the leakage or leakage in time during the leak test and debugging stage, but the microcracks will further expand after running for a period of time and vibration, and finally penetrate the pipe wall, causing the bellows to crack; or There is vibration in the engine and other equipment during use. After a period of use, the thin-walled bellows will cause material fatigue failure and cracking due to vibration; this is a common bellows failure mode.

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