I’ll use that sort of design for the smaller forge, this one is specifically for heat treating.
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I’ll use that sort of design for the smaller forge, this one is specifically for heat treating.
Did you mold the refractory into a flare or nozzle where the burner enters the forge? The flare or nozzle slows the gasses coming out of the mixing tube and stabilizes the flame so that the combustion stays at the burner.
No, I haven’t. I wanted to make sure it all would work before I wasted material on something that didn’t. I was also thinking that the back pressure from the forge itself would be enough.
Those frosty burners work well, you could hose clamp a quick and dirty sheet metal cone just to test your burner.
Most all of my burners are crap without a cone of some sort..
I’ll play with the other burner and see what kind of settings I get, hopefully gets me close enough for the one I welded into the ht Oven. Live and learn.
This could well be a big part of the problem. I'd say, cut the burner off of the shell and see if you can get it working outside of the forge with a nozzle. At most you will be out a pipe nipple. Also Frosty claims that you really want a reducing tee and not a straight tee and reducing bushing. I've never played with that design so........Quote:
Originally Posted by jfk742
I’m stumped, built both burners at the same time, same specs same material. I even swapped the T’s to make sure it didn’t have anything to do with the one that has a slightly off center hole for the pilot.
This seems to burn fine in open air:
Attachment 304755
I did the refractory in the forge and formed a 1in12 tapered flare as best I could to see if I could get the flame burning at the tip of the burner instead of the mouth of the forge, if anything I made it worse. With playing with all the adjustments I can’t even get it to burn correctly even at low pressure with the intake near completely choked.
I’m about to just hack it off and start again, only thing stopping me is that the other burner while using the same T and pilot setup burns pretty darn well in open air even without a flare, but maybe that’s the problem...
Man.....It seems there is not enough air coming into the area where the burner is????
When you welded the burner to the shell did you stick it through the shell and weld back further on the tube? Or did you weld the end flat to the shell? Did the welding misshape the end of the burner? Did slag enter the tube and distort the airflow.
Without being there I am again just thinking out loud of why the one "welded to the shell" would perform differently.:shrug:
Another thought....
Your muffle is taking up a large percentage of your front opening.
Is you opening being restricted enough to create a back pressure on your burner?
Either shorten your muffle or make your front opening bigger.
I think you hit the nail on the head there, Tim. I removed the muffler and there’s a marked difference on where and how the combustion is happening. I’ll cut back the muffler a bit and open the mouth of the forge some too. In hindsight, cutting a circular hole at the middle of the mouth side would have been a better choice, as well as lowering the muffler.
I did leave about a 1/2” of tube sticking into the forge, there doesn’t appear to be any obstructions.
For how simple these tools are I’ve sure made a confusing mess of things. Learning a ton in the process.
Just my 2¢ .... I think the muffle is to big in diameter thus restricting the amount of air movement and creating back pressure on the flame/nozzle.
Ah, a blocked goesoutta. You gotta have enough goesoutta to match your goesinta.
Your gas is pushedinta and your air is suckedinta and then they have to mixinta each other attaproper ratio which would be possibly limited by your goesoutta.Quote:
Originally Posted by bluesman7
What'samatteryou? Why you look so sad? It's a Nicea forge! Things are notso bad!
Whatsa matter you? Giva the thing some space........Ohshadduppa your face! :rofl2:
Howa quickly things cana descenda!
Sort of related...
Yesterday we fired up the maple syrup cooker at a friends house. The fire and heat wouldn't work right. It was very windy and cold outside so those were the first things we looked at.
The sap is not running strong here so we didn't have a lot to cook and left it to this morning to continue.
It ended up that the damper in the chimney was not indicating right and was restricting the outta.
After cutting the thing off and letting it fall back inside the firebox things got boiled by noon.
Had your honey yesterday morning on some toast, tasty stuff. Had waffles this morning, could of used your maple syrup ;), used some store bought stuff instead.
Been working on a 2x72 design, hopefully that will go better than the forge design.
A little update:
Hacked off a couple inches of the muffler, increased the mig tip size to .35” and did a little grinding on exhaust side of the burner, now all is well.
The grinder design is going well but not without many redesigns. At least with that I can post some pics before I actually even build anything and you guys can critique it, thus saving me money, time, heartache, and humiliation.
