DIY VAWT Project

BMaverick

Tractorologist
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Scrounging at its best Bret. I sit on the porch a lot especially in the morning. It’s funny at the trucks and trailers go by on trash pickup day. If I sit out there long enough I’ll see some on their way back home with a few good scores. Living in the country it’s hard to find usable stuff tossed out. Years ago I use to hit a few subdivisions in the morning now that’s some good pickings.
yeah, being in the country there are slim pickings. I got thru town each day dropping kids off to work. I find little gems at times.
 

BMaverick

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Got a few more free parts.

The interface of the motor pinion gear to be driven can't be weight loaded. The VAWT will need a bearing to take the load.
So, I've been kicking around a few ideas.

I this image, the data CD is the weight load to the motor below it. For scale and size, this works just fine. However, my system will be 20X this size and weight load is critical.

1658691852048.png

The fun vids of this are here.
 

chieffan

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Years ago when CB was the big thing and the big stacked directional beams were the thing, rotors that would not handle the load were quickly found. Mounting the rotor on a pipe on top of a tower was not an option as the first weight and 30-40 mph wind would tear it apart. We started to mont the rotors inside the tower and let the tower top tube take side force off the rotors. Then we came up with load bearing bearings mounted above the rotor inside the tower to take the down force or weight off the rotor. That was a lot of fun working up on a 40-60' towers, putting all that together with antennas that were on 20' cross poles. No way would I even consider that today but did it many times as no one else around would do it.

Your prototype is old school for sure but shows exactly what your tyring to accomplish. 3 lids on the CD would be enough and reduce the weight load tremendously. Used a similar set up and would count the number of flashes on the light to get wind speed and syncro motors for wind direction.
 

BMaverick

Tractorologist
Senior Member
Member
The motors are mounted, the motor-shields are in place, have a few bearings, a few circular plates, and a mess of ideas.

This recent article from 2017 provided a few more insights.


If I do things right, I can change out the rotating blade system on a whim to something else. Its possible to find the best setup for each season actually. Summer winds are slow and need a lighter blade frame. Winters are hard and brutal with winds and would need things really robust. A Spring/Fall turbine would handle those equinox seasons.

The article focuses on the Darriues Wind Turbine (the big hoop), something a bit more complicated over the Lenz Turbine. Taking their findings in a suburban environment and the height under 30FT, the article and links of their research can help anyone kick-start right away with a working project in no time.
 
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BMaverick

Tractorologist
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Start at the 45 second mark to avoid all the intro fluff.


Amazing how they improved the VAWT by 10-fold. The blades are not massively wide either. A 5:1 or 10:1 gearing would help.
 

BMaverick

Tractorologist
Senior Member
Member
The bearings I picked up from surplus are the general NSK 60060U. Got a 12 pack.

Deep Groove Ball Bearings Single Row
  • Inner (d) 30.00mm
  • Outer (D) 55.00mm
  • Width (B) 13.00mm
1659405421218.png

Should my blade system be tall and narrow, these bearings would help.
 

BMaverick

Tractorologist
Senior Member
Member
One of my motors is a 24VDC 5Amp. There is a way to take 24VDC and up the power to 220VAC. A little math is involved to calculate the up-scaling and amps too.

Why does this relate to the VAWT? Look at how little turns of the crank is needed to generate power. :)
Intead of the hand crank, the VAWT will be spinning the motor shaft.

So, poking around on the YT this vid popped up.

(turn off annoying sound music and just read the close caption instead.)

The guy have more vids in the comments.
 
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