Go Back   Pro/Forums > ProCooling Technical Discussions > General Liquid/Water Cooling Discussion > Water Block Design / Construction
Password
Register FAQ Members List Calendar JavaChat Mark Forums Read

Water Block Design / Construction Building your own block? Need info on designing one? Heres where to do it

Reply
Thread Tools
Unread 12-27-2003, 04:40 AM   #1
Titan
Cooling Neophyte
 
Join Date: Sep 2003
Location: CPU world
Posts: 15
Default Deciding Size of Oring

Need a little help on how to choose an Oring. For example this groove here should the diameter of the oring be the Length X or Y. Or should the longer length be taken if any other shapes were to be used for example a rectangle.
Attached Images
File Type: gif oring shape.gif (2.6 KB, 72 views)
Titan is offline   Reply With Quote
Unread 12-27-2003, 05:13 AM   #2
Teus
Cooling Neophyte
 
Join Date: Jun 2003
Location: Belgium\Ieper
Posts: 65
Default

I think (X+Y)/2
Teus is offline   Reply With Quote
Unread 12-28-2003, 03:52 PM   #3
Dieter@be
Cooling Neophyte
 
Dieter@be's Avatar
 
Join Date: Nov 2003
Location: Belgium\Wetteren
Posts: 94
Default

ellips:
(x^2/a^2)^2 + (y^2/b^2)^2 = 1

an ellips doesnt have "a" diameter.
it does have a "long diameter" and a short one, which are 2a and 2b (on your drawing x and y)

i dont understand your 2nd question.


btw:
http://forums.procooling.com/vbb/att...=&postid=97151
this pic i found in the sticky

Last edited by Dieter@be; 12-28-2003 at 03:59 PM.
Dieter@be is offline   Reply With Quote
Unread 12-31-2003, 01:47 AM   #4
Titan
Cooling Neophyte
 
Join Date: Sep 2003
Location: CPU world
Posts: 15
Default

Hmmm... I think i should rephrase my question again......here we go....
How should i select O rings for irregular shapes such as an eclipse. Should i take the "Diameter" or the Length of the longer side or the shorter one. Hope my question is clear enough. Pardon my english, I know it suxs
Titan is offline   Reply With Quote
Unread 12-31-2003, 03:34 AM   #5
Teus
Cooling Neophyte
 
Join Date: Jun 2003
Location: Belgium\Ieper
Posts: 65
Default

a regular O-ring will do, you can stretch them. the D-Tek WW that I've fixed also had a circular O-ring. it fitted perfectly in the milled grooves of the block
Teus is offline   Reply With Quote
Unread 01-02-2004, 09:48 PM   #6
Gooserider
Cooling Savant
 
Gooserider's Avatar
 
Join Date: Jun 2003
Location: North Billerica, MA, USA
Posts: 451
Default

I am not an expert on O-rings, so you will need to double check this - I am certainly open to corrections.

There are two numbers in the size of an O-ring, one is the diameter of the rubber the ring is made out of, and that is a function of the groove dimension. (if designing a block, there is a spec for groove size in the hole spacing sticky in the design forum.) The second number is the diameter of the circle formed by the ring itself. I believe it's the average between the OD and ID, but I could be wrong.

If the O-ring groove isn't circular, then one needs to find the length of the groove, (either by measurement or calculation) then calculate the equivalent diameter of a circle with the same length, then get an O-ring with the same or slightly smaller diameter.
(ie if length = 3.14" then get a 1" diameter O-ring) O-rings can easily be shaped to fit into irregular grooves. They can be stretched SLIGHTLY to do this, but don't like being squished into a shorter length.

If designing a block, it is necessary to design the groove so that it has a length that is the same as an available part. While it is possible to custom make O-rings in any size, this is generally considered a less than optimal approach.

(BTW, if I needed to find the size of an unknown irregular shaped O-ring, groove, I would probably do it by getting a peice of non-stretchy string approx the right diameter and wrapping it into the groove, cutting it to the right length and measuring the result. This would probably be easier, faster and more acurate than any calculation)

Gooserider
__________________
Designing system, will have Tyan S2468UGN Dual Athlon MOBO, SCSI HDDS, other goodies. Will run LINUX only. Want to have silent running, minimal fans, and water cooled. Probably not OC'c
Gooserider is offline   Reply With Quote
Unread 01-03-2004, 10:56 AM   #7
jaydee
Put up or Shut Up
 
jaydee's Avatar
 
Join Date: Dec 2001
Location: Spokane WA
Posts: 6,504
Default

You can also get some O-ring material and make your own O-ring to fit. That's what I do. Use super glue to connect the ends. If you are thinking about doing this commercially and can't find a pre-made one to fit then you can custom order them to any size you need but they will have to be in quantity.

Also if your using a CAD program click on the O-ring groove and select properties and it should (I think)tell you how long it is. There is other ways in ACAD2000 but I can't remember them off the top of my head.
jaydee is offline   Reply With Quote
Unread 01-03-2004, 07:43 PM   #8
siavash_s_s
Cooling Savant
 
siavash_s_s's Avatar
 
Join Date: Aug 2003
Location: here n there
Posts: 194
Default

this is a bit further off from o rings, but u may want to try a gasket? no milling involved atleast
__________________
buy me a mill
siavash_s_s is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 09:23 PM.


Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
(C) 2005 ProCooling.com
If we in some way offend you, insult you or your people, screw your mom, beat up your dad, or poop on your porch... we're sorry... we were probably really drunk...
Oh and dont steal our content bitches! Don't give us a reason to pee in your open car window this summer...