Kwiky burner with a twist

Squirrel cage are the quietest hands down. But they lack pressure. They move a lot of lot of air. A regular fan can move just as much air but with more pressure. Radial blowers can move the most amount of air...and depending on the design the highest pressure. But they get super loud.

I built a homemade dust collector system (blower and all) for my woodworking shop. That thing kicks off about 80 dB at 10 feet. I do not believe any manufacture has made a system as efficient yet.

 

Good to see ya got that one ironed out. With the kwiky, you don't need pressure that's for sure.

 

With a little bit more playing with different fittings, I think I’m going to illuminate the two needle valves for the fuel and just try the little mini red ball valves. I want to stick this all inside of a 1 inch black iron pipe. The ID of the black iron pipe is 1.050“. To place the brass T fittings inside the pipe centrally I will need to modify them a wee bit. I am stepping the 1 inch NPT down to half inch NPT and out the back I’m adding a quick connect with a hose fitting for my combustion air. I’m hoping I’ll be able to push enough air through a garden hose. The only thing I have a concern about (and I won’t know until I try it) is using the quick connect air fittings for the fuel. The quick connects do you restrict volume a bit.

 

For more detail here’s a video where I’m going with this. And my final design.


And here is my turning to make things fit. This is a bit of a boring video!

 

There ya go.... Keep pressing on!

 

Thanks Jason.

Today I put the whole assembly together and gave it a test. I was only testing using water. With pressurizing the nozzle with compressed air it would syphon about 2 feet I continued doing my test with 1 foot of syphon with a 20” drop . At 40 psi it would start to put air back in to the water or the combustible fuel line. Once the 20 inch syphon + drop was established, I could turn off the compressed air and get 6 L per hour flow. At 30 psi I was getting 12 L per hour flow rate.

I’m using a four stage turbine for my combustible air.

With the compressed air off and the combustible air off there was a steady stream that just dropped with gravity.

When I turned on the combustible air the water started spattering up to 4 feet away. But pretty big droplets. And they weren’t very well controlled.

So tonight I bored out the inside of the burn tube and I turned up a little Venturi for the combustible air.

My thought is maybe turning off the pressurized air at some point during the warm up and just use combustible air.
The brass Venturi has a 30° included taper with a 0.250” land and it is 1 inch long and 1.100” diameter, with the through hole being 0.600”. I also modified the squarehead nozzle into a hex.

I figured this would assist in adjustments with using a socket head cap screw with a little T handle welded on. I machined it to 5/16.

 

If I had access to half your tools, I'd be friggen dangerous! Nice lathe work.

 

Tools are nothing without knowledge. Jason, you need anything let me know.

 

I did need a lathe last week for my wifes insane shoerack... But I re-enginerded it. Not easy finding a 55/64" drill bit on the local market.
Thanks Matt.

 

When Tool and die maker’s retire they got to do something... or they die. Idle hands are the devils playground. Yeah I have a full machine shop in my 600 square-foot garage. Most of my machines are three phase(600v). Sometimes we just make things work.

 

A company called Fuji make them for their spray equipment. They even have a 5 stage turbine. The 5 stage boasts 9.5 psi at 150 CFM. https://www.amazon.com/d/Paint-Sprayers/Fuji-2805-T75G-Mini-Mite-Gravity-System/B01B9X3GKW
They also have a five stage Q series (which stands for quiet) . The Q series is a little bigger. From my understanding it has insulation inside to keep it quiet needing the bigger shell.

 

Yeah, I’ve owned the painting system for 5+ years. At the time I bought it, it was around $275 CAD just for the turbine and hose. That’s like US$75

I guess you guys haven’t noticed my ($75CAD) Starrett workbench?

 

And I thought he was blowing it with a Dyson.

 

You guys crack me up.

I needed to keep the new Venturi in place and adjustable. I added A flat



and 10-32 setscrew in the burner tube. I also had to taper the hex coupling to 30° just before the nozzle.



I still need to weld on a little T handle on to the socket head cap screw. Hopefully this will be the last time I put it back together.

 

Assembling all this crap inside a pipe is a PITA. That's why mine has blue tape covering the 1st generation holes. I'm NOT taking it apart AGAIN! If it works, Don't F with it!

Look at the shine on that black pipe.

 

I finished a little bit more testing and The small hose ball valve was restricting airflow. The hose through hole is .320”. Well at Home Depot today I found the natural gas ball valve to have a through hole of .600” . The quick connect through hole is .510” . This makes whole burner assembly a little longer than I was hoping(13.5”). But I’m glad I found A ball valve that would not restrict the air quite so much.