A fiber-resin-based composite material pressure-resistant shell opening reinforcement sealing structure

Abstract

The invention discloses a fiber-resin-based composite material pressure-resistant shell opening reinforcement sealing structure, which is composed of a reinforcement, a non-standard sealing retaining ring and an end cover; The hole on the wall and the inner surface of the shell around the hole are bonded by high-viscosity epoxy resin; one end of the non-standard sealing retaining ring is a curved surface, and the other end is a plane, and the curved surface end is completely attached to the outer surface of the composite pressure-resistant shell; the end cover and The reinforcement is threaded and forms extruding contact with the flat end of the non-standard sealing ring; the sealing ring is placed in the sealing groove of the end face of the reinforcement, and forms an axial seal with the end face of the reinforcement through extrusion at the bottom of the end cover. The opening of the pressure shell and the reinforced sealing structure are designed to have a good fit with the inner wall of the shell and a non-standard sealing retaining ring with a good fit with the outer wall of the shell and increase the contact area to improve the overall structural strength after reinforcement and reduce the The stress at the edge of the hole after the reinforcement is small; it is easy to disassemble and assemble, and has a wide range of applications.

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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