help with damper design for wood stove

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stevebo
Posts: 74
Joined: Tue Aug 25, 2009 7:24 pm

help with damper design for wood stove

Post by stevebo » Tue Aug 25, 2009 8:30 pm

I am working on a design for a wood stove, using a can as the stove body. The can will have draft/vent holes on the sides, near the bottom. Heres the catch, I would like to be able to close off the holes to adjust the draft, and possibly be able to have a posative cutoff , so its got to be a tight seal with very little air leakage. Any ideas? Any suggestions? Thanks!

realityguy
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Location: slightly north of Seattle,WA

Re: help with damper design for wood stove

Post by realityguy » Tue Aug 25, 2009 9:13 pm

see "featherfire"....
The views and opinions expressed by this person are his own and not the general consensus of others on this website.Realityguy

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zelph
Posts: 15822
Joined: Tue Aug 14, 2007 1:53 pm

Re: help with damper design for wood stove

Post by zelph » Tue Aug 25, 2009 9:29 pm

Plumbing department have connectors that use stainless steel bands to tighten the joint. I think they go up to ^" in dia. I'll see if I can find a photo..

See this thread:
Stainless steel source of supply viewtopic.php?f=41&t=204

They have them in a smooth finish also

remote simmer control viewtopic.php?f=41&t=900
http://www.woodgaz-stove.com/

stevebo
Posts: 74
Joined: Tue Aug 25, 2009 7:24 pm

Re: help with damper design for wood stove

Post by stevebo » Tue Aug 25, 2009 10:03 pm

zelph,thats a great idea---------I was thinking about somthing along those lines---------maybe using a rivnut? What would work great is a course threaded rivnut (so you wouldnt have to turn it so many times to get it to move full travel), but to the best of my knowledge, there is no such thing. Ill see what I can come up with---------thanks for the inspriation! :D


P.S. with a set up like that zelph, do you have problems with the threads binding as the metal heats up? Also, does the stove tend to move as youre cranking on the screw, (do you have to hold the stove stationary while adjusting the screw?)

irrationalsolutions
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Location: South Carolina

Re: help with damper design for wood stove

Post by irrationalsolutions » Tue Aug 25, 2009 10:30 pm

here is a video of a guy on youtube that might help you out some.

http://www.youtube.com/watch?v=Ak2vWpfGsKI
“Do or do not... there is NO try.” Yoda

Luke "Whats in (out) there?" Yoda "Only what you take with you."

Luke "I can’t believe it." Yoda "That is why you Fail.”

stevebo
Posts: 74
Joined: Tue Aug 25, 2009 7:24 pm

Re: help with damper design for wood stove

Post by stevebo » Wed Aug 26, 2009 12:00 am

The You tube video was great---I got another great idea from it---thanks for the link! It looks to me like hes using a sheetrock screw as his adjustment mechanism. That would give me the coarse thread Im lookin for. Thanks for the help!

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zelph
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Re: help with damper design for wood stove

Post by zelph » Wed Aug 26, 2009 10:34 am

I did not have any problems with the threads heating up.

Here is a closeup of the Featherfire mechanism:

Image
http://www.woodgaz-stove.com/

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