An interesting o-ring installation. But is it correct ?

Waterproof Housing, Frames, and Buoyancy Methods.
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dtrip
Posts: 28
Joined: Jan 25th, 2015, 10:01 am

An interesting o-ring installation. But is it correct ?

Post by dtrip »

Hello,

this guy made an acrylic (plexiglass) casiing for his camera, which can withstand good pressures.
http://www2.mrc-lmb.cam.ac.uk/personal/ ... index.html

However, I believe that this is not the proper way to use an o-ring, because it should reside inside a groove.
What he did is simply use a "top-hat side view" configuration, for the o-ring to reside in.

It would greatly simplify my design if I did the same. However I am wondering wether it is the correct way to do it.

Target depth is 50 meters.

What would you advise ?
fryslan76
Posts: 290
Joined: Dec 18th, 2012, 4:52 pm
Location: Netherlands

Re: An interesting o-ring installation. But is it correct ?

Post by fryslan76 »

The design will work only your biggest problem will be to keep track of your O-ring, since it can easily get loose when the clip is not lashed.

KR,

Sjoerd
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olegodo
Posts: 222
Joined: Aug 30th, 2013, 9:47 am
Location: Bergen, Norway

Re: An interesting o-ring installation. But is it correct ?

Post by olegodo »

Just select an o-ring that stretches slightly on to the "top hat" part and it wont go anywhere. Also make sure the clearance between the tube and top hat is as tight as you can make it so that you don't risk the o-ring getting forced in between them.

Advantage is that the deeper you go, the tighter the seal gets.
dtrip
Posts: 28
Joined: Jan 25th, 2015, 10:01 am

Re: An interesting o-ring installation. But is it correct ?

Post by dtrip »

Ok, I get you!

I am not planning to open the ROV during missions. Only when I get back home.
So this is it, then. Thanks a lot.

Dimitris
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bigbadbob
Posts: 272
Joined: Nov 28th, 2011, 10:24 am

Re: An interesting o-ring installation. But is it correct ?

Post by bigbadbob »

I would have a groove or chamfer the inside of the plexiglass tube and use a thinner o-ring, so the ring is pushed into the chamfer.
His method doesn't support the o-ring so it will get squashed out as water pressure increases at depth.
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