Fiber resin matrix composite pressure-resistant shell opening reinforcing and sealing structure

Abstract

The invention discloses a fiber resin matrix composite pressure-resistant shell opening reinforcing and sealing structure, which is composed of a reinforcing piece, a non-standard sealing check ring and an end cover, wherein the reinforcing piece is integrally formed through a die-casting process, and is bonded with holes in the wall of a composite pressure-resistant shell and the inner surface ofthe shell around the holes through a high-viscosity epoxy resin glue, one end of the non-standard sealing check ring is a curved surface, the other end is a plane, the curved surface end is completely attached to the outer surface of the composite pressure-resistant shell, the end cover is in threaded connection with the reinforcing piece and forms extrusion contact with the plane end of the non-standard sealing check ring, and a sealing ring is arranged in a sealing groove in the end face of the reinforcing piece and forms axial sealing with the end face of the reinforcing piece through bottom extrusion of the end cover. According to the pressure-resistant shell opening reinforcing and sealing structure, the non-standard sealing check ring with good fit degree with the inner wall of theshell and the non-standard sealing check ring with good fit degree with the outer wall of the shell are designed, and the contact area is increased, so that the overall structural strength after reinforcing is improved, the hole edge stress after reinforcing is reduced, and the structure is convenient to disassemble and assemble and wide in application range.

Description

technical field [0001] The invention relates to the structural design and manufacturing technology of a composite material pressure-resistant shell, in particular to a fiber resin-based composite material pressure-resistant shell opening reinforcement and sealing structure. Background technique [0002] In order to meet the needs of many different missions in marine environment monitoring, resource exploration, and military security, large diving depth and lightweight are becoming important development directions for underwater vehicles (AUVs). The pressure-resistant shell is the core component of the underwater vehicle. It must have sufficient strength and stability to protect its internal instruments, equipment, electronic components, etc., and prevent them from being damaged by seawater pressure. In addition, the pressure-resistant hull must also meet the requirements of light weight under the condition of large diving depth, so as to increase the payload of the underwate...

AI Technical Summary

Problems solved by technology

However, opening holes in composite pressure shells faces great challenges. On the one hand, opening holes leads to discontinuous fibers, which greatly reduces the strength at the opening position. Reinforcement structures need to be designed for reinforcement. At the same time, attention must be paid to reducing the structure around the holes. Local stress; on the other hand, the sealing of openings and reinforcements is also very critical. After the pressure shell is opened, the edge of the hole is a special-shaped surface, which makes the sealing after reinforcement very difficult.

[0005] Invention patent 201910552022.1 "Sealing structure and method of an open-hole composite material head" proposes a composite material shell sealing structure, but this sealing structure is a permanent seal, cannot be disassembled, and cannot meet the needs of frequent replacement of electronic components or maintenance needs

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