Re: [PSUBS-MAILIST] enquiry - Propulsion

["steve" <steve@kobol.worldonline.co.uk>]

Hi Dan

i haven't tried carbon ceramic seals, my experimental thruster uses a viton
rotary shaft seal.
i started with a nitrile seal but even at low revs i found the friction
started to melt the seal, the viton seal is harder wearing but i find that
the shaft movement and the pressure lets some water in so i was looking at
other ideas.

Do you know of a supplier where i could get these seals from.


Steve Bosworth
UK


----- Original Message -----
From: "Dan H." <JMachine@adelphia.net>
To: <personal_submersibles@psubs.org>
Sent: Thursday, September 18, 2003 12:43 PM
Subject: Re: [PSUBS-MAILIST] enquiry - Propulsion


> Steve,
>
> Have you tried carbon ceramic face seals that are used in rotary water
> pumps.  They have a spring loaded carbon face that mates to a stationary
> ceramic face and will work well even under considerable pressure.
>
> Dan H.
>
> ----- Original Message -----
> From: "steve" <steve@kobol.worldonline.co.uk>
> To: <personal_submersibles@psubs.org>
> Sent: Wednesday, September 17, 2003 7:56 PM
> Subject: [PSUBS-MAILIST] enquiry - Propulsion
>
>
> > Hi All
> >
> > i have a question regarding propulsion but not for surface travel.
> >
> > I am trying to research (small ROV size) thrusters with a magnetically
> > coupled shaft but am not able to find much on the subject.
> >
> > my own design thrusters are ok but i am having to look at filling them
> with
> > oil to maintain the sealing.
> > i would like to do some experimenting and was wondering, is there anyone
> on
> > the list who has built such a device or can point me in the right
> direction?
> >
> > any ideas would be appreciated
> >
> > Steve Bosworth
> > UK
> >
> >
>
>