eco redneck Posted June 6, 2013 Share Posted June 6, 2013 I was wondering how to make a blower for my forge? would I be able to rig up a car turbo to work the same way to be like a hand crank blower? need some help trubo.bmp Quote Link to comment Share on other sites More sharing options...
dmac27 Posted June 6, 2013 Share Posted June 6, 2013 Here is what one guy came up with. http://www.rayrogers.com/blower.htm Quote Link to comment Share on other sites More sharing options...
MLMartin Posted June 7, 2013 Share Posted June 7, 2013 If you have a nice blower housing and impeller why not look into mounting a 1/4 horse electric motor. Who wants to crank all day Quote Link to comment Share on other sites More sharing options...
BobL Posted June 7, 2013 Share Posted June 7, 2013 Most turbos output a lot of air so you will need some way to control the flow. The idea way would be to use a variable speed electric motor but the most common way to do this is with a simple spill valve. However, if the turbo is from a big engine then depending on what RPM is used you might end up with a gale coming out of the spill valve so some form of speed control will be needed. The attached graph gives you an idea of engine CFM requirements versus RPM at different engine displacements (in cubic inches) - this is not exactly the same as turbo outputs but it gives you an idea of engine requirements. For example a 350 cin engine draws about 300 cfm at 3000 rpm while a 100 cin needs about 90 cfm. My guess is you will need less than 100 cfm to run a forge so if you do decide on a turbo then one for a small engine (~100 cc or less) would be all that you would need. Whatever you use It seems like a very expensive way to go. Quote Link to comment Share on other sites More sharing options...
Frosty Posted June 7, 2013 Share Posted June 7, 2013 You sure can, it's being done every day in third world countries. Probably the most useful component in Asian countries seems to be bicycles, a little artistic thinking and tinkering and you can get them to gear the drive wheel way up, then use a belt off the tire to drive the blower and you have one screaming fast drive. Fill the tire with sand and water and it's heavy enough to keep turning for quite a while after you let go of the crank. All you need then is a simple impeller. Think balanced disk and bearing on a shaft in a circular housing. The center of the housing needs to be open for the air intake and a small section on the rim has the outlet. A tin can and duct tape will make a dandy outlet and if you tip it in the direction the impeller is turning you're golden. All that's left are impeller blades and these are silly easy to make. If the housing your impeller disk is in is say 2" wide so there's say 1 1/2" between the disk and the housing on the same side of the housing as the air intake. Now simply start cutting tin cans into small semi circular sections maybe 2-3" long and narrow enough they fit inside the housing without rubbing, go ahead bend them to fit, they won't mind. you DO want them all the same size and weight for balance! Use a couple wood screws each and affix them to the disk near the outer edge. It doesn't make sense intuitively but it isn't as important to have the cup side facing the direction of rotation as intuition makes it seem. That said, have them all facing the direction of rotation and it will blow harder for less effort. Now with a little tinkering make a stand, find something for an air line to the forge and you're almost ready to go. The impeller still needs a little balancing and this is the trickiest part of the whole seebang. If you've used a solid enough axle and bearings a little vibration shouldn't be a big thing. Just make the unit heavy enough and solidly mounted enough it doesn't matter. If it is wobbling badly enough to matter get a lumber crayon and take the outlet can off. Crank it till it wobbles and carefully insert the lumber crayon into the housing till it just kisses the disk. What you're trying to do is find the heavy side of the disk so you only want the crayon to kiss it at the point it's farthest from center. THEN put another wood screw into the opposite side of the disk. Repeat till it's balanced enough to work for you. That's it, easy greasy home made blower, any tinkerer can do it and have fun making it too cool for school. you may wonder why the wood disk impeller. that's because making an impeller with a frame is just so much harder to make and balance. a 1/4" 3/8" plywood disk is just too easy peasy and plenty skookum. Frosty The Lucky. Quote Link to comment Share on other sites More sharing options...
K. Bryan Morgan Posted June 7, 2013 Share Posted June 7, 2013 '?do=embed' frameborder='0' data-embedContent>> Quote Link to comment Share on other sites More sharing options...
eco redneck Posted June 7, 2013 Author Share Posted June 7, 2013 thanks for all the input every one i understand where you are getting at Bobl with the cfm stuff i was looking at what frosty said and i think i may do that because here in Alberta it is hard to find any smithing stuff at a decent price thanks again tristan Quote Link to comment Share on other sites More sharing options...
Frosty Posted June 7, 2013 Share Posted June 7, 2013 That's the one by an IFI member I was thinking of! Thank you Bryan. How's warm feel buddy? I'm basking in 70f but I don't know about this smelly water oozing out of my skin. <grin> Frosty The Lucky. Quote Link to comment Share on other sites More sharing options...
K. Bryan Morgan Posted June 7, 2013 Share Posted June 7, 2013 Winter is finally over. Tomorrow fall starts. :LOL: Got the garden put in and the rabbit fence up. Now to get the house painted and the windows all re-glazed. Need to forge something. I don't care what. Quote Link to comment Share on other sites More sharing options...
Frosty Posted June 7, 2013 Share Posted June 7, 2013 STARTS TOMORROW!?!?!! ARGH, you had me for a second there. The too quick decent into winter doesn't start for 15 days! That's a MEAN joke Bryan Quote Link to comment Share on other sites More sharing options...
BobL Posted June 7, 2013 Share Posted June 7, 2013 How's warm feel buddy? I'm basking in 70f but I don't know about this smelly water oozing out of my skin. <grin> Frosty The Lucky. Now I understand the name. I just had a look at the average highs for Anchorage and the only month in the year where the average high is higher than Perth is July (66 versus 65) - don't forget that's mid-winter for us. I like winter's here - there's a bit of rain every now and then otherwise it's nice and sunny and as we call it "cool". Quote Link to comment Share on other sites More sharing options...
Frosty Posted June 7, 2013 Share Posted June 7, 2013 So we both like this time of year, coool. Frosty The Lucky. Quote Link to comment Share on other sites More sharing options...
K. Bryan Morgan Posted June 8, 2013 Share Posted June 8, 2013 Whats the line from Game of Thrones? Winter is coming. Yesterday it was cold enough in the morning for our heater to kick on and its set at about 62, I don't know what the temp was outside. But, today was very nice. Mid 70s and party cloudy. Quote Link to comment Share on other sites More sharing options...
Dale M. Posted June 8, 2013 Share Posted June 8, 2013 IF you are going to have motorized blower go to a resale shop and just spend $3 for used hair drier and disconnect heating element.... IF you want mechanical blower some like of squirrel cage (car heater fan) with 4:1 or 5:1 dear ration will do fine.... Auto turbos rely on really high rpm to create air pressure.... Its more work and bulk than its worth, but if that is what you want ..Go go it... Dale Quote Link to comment Share on other sites More sharing options...
eco redneck Posted June 9, 2013 Author Share Posted June 9, 2013 ok thank you dale ya i just want something that i could use like a hand craned blower Quote Link to comment Share on other sites More sharing options...
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