Re: [PSUBS-MAILIST] motor seals

["Gary R. Boucher" <protek@shreve.net>]

Jon,
     The trolling motor shaft has a seal but it would not be necessary in 
this system.  The trolling motor would have on its shaft two magnets 
mounted say one to three inches from the center of rotation, sort of like a 
"T" with the magnets on the ends of the top of the "T" if that makes 
sense.  There will be a second "T" with magnets, on the other side of a 
barrier that holds the pressure back.  When the motor drives the inside "T" 
the outside "T" follows within a few degrees of rotation.  The water side 
"T" is rotating at the same RPM as the inner (driven) side "T".  The motor 
side is the driving element.  Water can not get through the barrier to be 
able to get into the motor.  The only use of a seal may be to protect the 
bearings that allow the water side "T" to rotate.
     The two "T"s will be placed as close as possible to the barrier to get 
the best coupling possible.

Gary B.

At 06:42 AM 8/16/00 , you wrote:
>Gary, Stan,
>
>Thanks for the clarification.  One more clarification...are you folks 
>suggesting
>
>that the magnets and seal rotate as a unit, or that the magnets are separated
>from the seal by some amount of airspace?
>
>Thanks,
>Jon