An Overview of Underwater Connectors

• Published in: Journal of marine science and engineering Vol. 9; no. 8; p. 813
• Main Authors: Song, Wentao, Cui, Weicheng
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.08.2021
• Subjects: Autonomous underwater vehicles; Cables; Commercial off-the-shelf technology; Connectors; Constraining; Deep sea; Deep sea environments; Deep water; Design; Locking; Observatories; penetrable self-sealing; Power; pressure-balanced; Renewable resources; Technology; Underwater; wet-mateable
• ISSN: 2077-1312; 2077-1312
• DOI: 10.3390/jmse9080813

Underwater connectors are very essential and complex components of deep-sea engineering equipment and their design and manufacture have apparent multidisciplinary characteristics. Wet-mateable connectors (WMCs) represent the highest level of technology in this field, and only a very few countries in the world can produce WMCs. So, WMCs are likely to be a constraining factor to some maritime powers that might try to achieve breakthroughs in this field, constraining the innovation-driven development of deep-sea equipment. This paper gives a detailed overview of underwater connectors, both electrical and optical. First, the background of underwater connectors is introduced, and then the main available commercial off-the-shelf (COTS) products are described. Next, the new concept of functional units is proposed by the authors to help readers to have a better understanding of underwater connectors. Then, the basic theories of design are introduced according to different functional units, covering the aspects of electrical/optical connection, pressure-balanced oil-filled (PBOF) technology, penetrable self-sealing, aligning and locking structures. Finally, some discussions and conclusions are presented. This paper aims to reveal the secrets of key technologies used in underwater connectors, especially in WMCs.