Re: [PSUBS-MAILIST] motor seals

[Jon Hylands <hylands@ibm.net>]

On Tue, 15 Aug 2000 09:20:36 -0700, "Gary R. Boucher" <protek@shreve.net>
wrote:

>      I believe there may be a way to engineer a coupling with these 
> high-strength magnets. 

Yeah, that's what I was planning on using for my next-gen thrusters. I even
have a couple very tiny rare-earth magnets that I will use as magnetic
switches for external power shut-off.

> If the magnets 
> are placed on either side of a flat plate for the coupling you have the 
> additional problem of using a flat, non-metallic plate to withstand the 
> water pressure.  I believe that a tube of non-metallic material perhaps PVC 
> or fiberglass (not composite - carbon fibers conduct!) could be used. 

I would think something simple like acrylic would work well. What I'm
planning on doing (on a much smaller scale) is machining the thruster tube
end cap out of a piece of Delrin rod, but I'm not sure yet what arrangement
of magnets will work best.

Later,
Jon

--------------------------------------------------------------
   Jon Hylands      Jon@huv.com      http://www.huv.com/jon

  Project: Micro Seeker (Micro Autonomous Underwater Vehicle)
           http://www.huv.com