----- Original Message -----
Sent: Wednesday, December 13, 2006 3:19
PM
Subject: RE: [PSUBS-MAILIST] Magnetic
couplings
Oh, idea. Those moving magnets can generate
electricity. Feed it back to the motor, and you have a perpetual motion
machine. Lets see who swallows that one...
:)
Alec
After (simply) buying a coupling you would still
have to deal with the alignement of the two axes. When you look at the
cut-away picture you will see they apply a big and strong frame to achieve
that. A small misalignment will be increased by the force off the magnets. I
think starting from scratch might even be the easier way.
I have added 3 more links. One of them shows a
configuration in which the magnets are placed in 2 causers opposing each
other. It seems this is much more forgifing than the other solution. The
separation between the two parts is a flat disc. This might be a problem
under high pressure. Another problem is the axial force on the
bearings.
Another thing to consider if the influence of the
magnets on a compass and maybe other electronic components. Applied in
a ROV you can forget the compass.
Greatings,
Thijs Struijs
The Netherlands
-----
Sent: Wednesday, December 13, 2006 6:52
PM
Subject: Re: [PSUBS-MAILIST] Magnetic
couplings
Granted, but there is plenty that
needs to be fabbed on a psub already.
IMO you are best served fabbing as little as
you can and getting the
project wet sooner (and more cost effectively)
rather than later.
Designing things is fun and engaging but life
is short, even at <30.
Just my .02 though.
-patrick
----- Original Message -----
Sent: Wednesday, December 13, 2006
10:16 AM
Subject: Re: [PSUBS-MAILIST] Magnetic
couplings
Half the fun of this hobby is fabricating
things though...
----- Original Message -----
Sent: Wednesday, December 13, 2006
9:58 AM
Subject: Re: [PSUBS-MAILIST]
Magnetic couplings
It is probably cheaper to buy them off the
shelf anyway.
You may need to go through a middleman If
they won't sell Onesies/Twosies though.
-Patrick
----- Original Message -----
Sent: Tuesday, December 12, 2006
3:26 PM
Subject: Re: [PSUBS-MAILIST]
Magnetic couplings
Man that looks so close to my own design
it's not funny, I hope they didn't patent it.
----- Original Message -----
Sent: Tuesday, December 12,
2006 2:56 PM
Subject: [PSUBS-MAILIST]
Magnetic couplings
Some off the shelf
magnetic couplings
Regards
Thijs
Struijs
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