Sealing a wiring port to withstand water at 130+ psi?

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Discussion Overview

The discussion centers around the challenge of sealing an electrical port for an ROV thruster that must withstand high pressure underwater, specifically at depths of 300 feet. Participants explore potential solutions for ensuring that the electrical connections do not leak while maintaining functionality in a pressurized environment.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • The original poster seeks information on electrical ports that can withstand high pressure without leaking, specifically for a 12v system with 15 amps.
  • One participant suggests a resource that offers penetrations capable of withstanding up to 700 bars, indicating that solutions do exist.
  • Another participant questions the necessity of running power through the hull and proposes an alternative design where the thruster operates in water, with only the magnetic field needing to pass through the hull.

Areas of Agreement / Disagreement

Participants have not reached a consensus; there are multiple competing views regarding the best approach to sealing the electrical port and whether it is necessary to run power through the hull.

Contextual Notes

Limitations include the lack of detailed specifications for the proposed electrical ports and the assumptions regarding the thruster design and its compatibility with the proposed sealing methods.

mbewley59
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Hey everyone- I'm designing an ROV thruster which, for starters, will operate down to a depth of 300 feet. My problem is that I can't find any information regarding an electrical port which can pass through the hull out into the pressurized atmosphere without leaking. This will be a 12v system pushing about 15 amps for now, and I expect to use 2 or 3 wires.

Can someone point me in the right direction? I've got some concepts in my head, but nothing I can verify anywhere. Thanks!
 
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:welcome:

I don't understand why you are having trouble, just a few seconds on Google brought me to this site which has penetrations for up to 700 bars.

http://www.pavetechnologyco.com
 
Wow, that was quick! Guess I just didn't search on the right (obvious) terms. I get a little brain-dead sometimes.

Thanks so much, anorlunda!
 
Where is the power going? Do you really need to run it through the hull? If it's going to a thruster will the thruster also have matching connectors and shaft seals?

Could you not design it so that the thruster rotor actually operates in water and only the magnetic field (eg between stator and rotor) has to pass through the hull? Just a thought.
 

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