Storage-tank-type crescent corrugated pipe assembly

Abstract

The invention belongs to the technical field of airspace engine fuel tank products, particularly relates to a storage-tank-type crescent corrugated pipe assembly and aims at solving the problems that the leakage rate of the existing welded corrugated pipe is high, the leakage potential is great, the axial compensation displacement of the formed corrugated pipe is small and the use requirement of storage tank products cannot be met. The storage-tank-type crescent corrugated pipe assembly comprises a crescent corrugated pipe, wherein the crescent corrugated pipe is provided with one longitudinal weld, each ripple of the crescent corrugated pipe comprises a concave side surface and a convex side surface, the concave side surface and the convex side surface are fitted with each other in a compressed state, one end of the crescent corrugated pipe is welded with a butting ring through electron beams, the other end of the crescent corrugated pipe is welded with a sleeve through electron beams, a shell is sheathed outside the crescent corrugated pipe, the butting ring and the sleeve, and the butting ring is connected with a seal head and the shell through bolts. The storage-tank-type crescent corrugated pipe assembly has the advantages that the axial extension and compression displacement of the corrugated pipe can be effectively increased, the mutual fitting of corrugated surfaces is realized during compression and the total displacement can reach more than 70 percent of the effective length of the corrugated pipe.

Description

technical field [0001] The invention belongs to the technical field of aerospace engine fuel storage tank products, in particular to a storage tank type "crescent-shaped" bellows assembly. Background technique [0002] In aerospace engine fuel storage tank products, the tension and compression displacement of the bellows is required to reach more than 70% of the effective length of the bellows, and the fuel in the inner cavity of the bellows has been emptied to the greatest extent. The existing bellows for storage tanks use welded bellows. The welded bellows are bellows formed by welding the inner and outer edges of multiple metal diaphragms. Due to the large number of welds, the leakage rate of the bellows is difficult to control and there are many hidden dangers. It is not suitable for use in aerospace engine fuel storage tank products. The traditional forming bellows is formed by hydraulic pressure or other methods of seamless or one longitudinal seam. The common wavefor...

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Problems solved by technology

[0003] In order to solve the problems that the existing welded bellows have a high leakage rate and hidden danger, the axial compensation displacement of the formed bellows is small, and cannot meet the requirements for the use of storage tank products, the present invention provides a storage tank type "crescent crescent". "shaped" bellows assembly, the axial tension and compression displacement can reach more than 70% of the effective length of the bellows, and there is only one longitudinal weld, the leakage rate is low, and the leakage hazard is small

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