Author Topic: VAWT new proto-type  (Read 208428 times)

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GoVertical

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VAWT new proto-type
« on: July 20, 2010, 07:21:48 PM »
I completed fabricating a new VAWT. I still need to attach the PMA. I will first try direct drive and if that proofs not to provide enough RPM’s it can easily be configure with a pulley and belt drive.  The proto-type shows the hub needs a lot of improvement and I still need to add alignment braces to the top and bottom of vertical blades.  The designs allows for easily increasing the blade size if required. Waiting for wind so performance can be evaluated. Still lots of room for improvement but all in all, it is a good start. Comments welcome. Cheers.


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SparWeb

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Re: VAWT new proto-type
« Reply #1 on: July 20, 2010, 11:26:38 PM »
I just like the look of it.  Why ruin the appearance with a bunch of wires?   ;)
No one believes the theory except the one who developed it.  Everyone believes the experiment except the one who ran it.

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Bruce S

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Re: VAWT new proto-type
« Reply #2 on: July 21, 2010, 02:11:57 AM »
I like the way you can adapt to add larger blades if necessary.
What have you decided to use as bearings on the inside.

"Waiting for wind" yup Murphy's first law of "mills... has come to visit you too.

Cheers
Bruce S
 
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GoVertical

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Re: VAWT new proto-type
« Reply #3 on: July 21, 2010, 06:20:46 AM »
Greetings, The bearings are 5/8 ID and I have to fabricate the PMA with a rotating central shaft. All previous PMA’s were constructed with a stationary central shaft.  I found some off the shelf hubs that will aid with fabrication. I used plastic paneling I found at HOME DEPOT for the blades.  The concept drawing shows 6 blade but I cracked one of the blades testing how far it would bend so I reconfigured the proto-type with 5 blade just to test if it could be fabricated.  What would perform better 5 or 6 blades?  Still no wind, but I mounted a trailer hatch to the car so I use a cargo carrier and mount the VAWT for testing. It gives the neighbors something to talk about when I do the road tests, but it is all in good fun. Thanks for the input and best regards. 

HUB link:
http://www.globalindustrial.com/p/hvac/parts/fan-blades/packard-hex-round-hub-5-8-bore-2-set-screws?utm_source=google_pr&utm_medium=cpc&utm_campaign=Replacement-Fan-Blades-google_pr&infoParam.campaignId=T9F

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taylorp035

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Re: VAWT new proto-type
« Reply #4 on: July 21, 2010, 08:54:31 AM »
I would make it as tall as possible for a larger windswept area.  As for the 6 blades, I am not sure, but it has to be better than my 3 bladed attempt:
http://fieldlines.com/board/index.php/topic,143339.0.html

What rpm are you shooting for?  I would think you would want cut in to be about 30-40 rpm with a diameter of about 2-3 feet.

I found that my 3 blade version failed mainly b/c of the shape of the blades.  It would shake a lot too. 

Good luck!

Bruce S

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Re: VAWT new proto-type
« Reply #5 on: July 22, 2010, 12:01:33 AM »
Greetings, The bearings are 5/8 ID and I have to fabricate the PMA with a rotating central shaft. All previous PMA’s were constructed with a stationary central shaft.  I found some off the shelf hubs that will aid with fabrication. I used plastic paneling I found at HOME DEPOT for the blades.  The concept drawing shows 6 blade but I cracked one of the blades testing how far it would bend so I reconfigured the proto-type with 5 blade just to test if it could be fabricated.  What would perform better 5 or 6 blades?  Still no wind, but I mounted a trailer hatch to the car so I use a cargo carrier and mount the VAWT for testing. It gives the neighbors something to talk about when I do the road tests, but it is all in good fun. Thanks for the input and best regards. 

(Attachment Link)
The performance of a 5 or 6 bladed unit will actually depend on its balance more than one extra or less blade. One of the things you will need to possibly look at, is how the air moves in and out of your design. Once the air has had a chance to get into the scoops, it must be able to exit without too much extra work.
Personally : I would go with the 5 bladed unit and calculate the swept area for it, if you need more, or want higher RPMs then go taller not wider. Too many blades could work against you as they start to get in each others wind.

Also; remember the genset does not have to be right at the hub or blades. This is one of the "pros" of a VAWT whereas you can locate the genset were you want within reason.
Hope this helps;
Bruce S

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GoVertical

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Re: VAWT new proto-type
« Reply #6 on: July 23, 2010, 05:28:06 PM »
Greetings, posted video and still waiting for wind  :-[

http://www.youtube.com/watch?v=uCs7-HHadwk
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bj

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Re: VAWT new proto-type
« Reply #7 on: July 23, 2010, 07:45:26 PM »
  GoVertical:   Hope it works out, 'cause it sure looks slick.  Kind of makes me want to try one, but I am already
confused enough with horizontals.
  Good luck.
"Even a blind squirrel will find an acorn once in a while"
bj
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None54

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Re: VAWT new proto-type
« Reply #8 on: July 24, 2010, 06:35:35 PM »
Hello all...new to the sceen, I'm also working on a vertical axis wind turbine. I find this site and the welth of knowledge absolutly fasinating. Very well to the point and in such a wide array of topics.   None54

GoVertical

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Re: VAWT new proto-type
« Reply #9 on: July 25, 2010, 07:47:08 AM »
Hello all...new to the sceen, I'm also working on a vertical axis wind turbine. I find this site and the welth of knowledge absolutly fasinating. Very well to the point and in such a wide array of topics.   None54

Greetings and welcome. I hope to see some pic’s of your project.
http://www.vawts.net/
The above link is another great site for VAWT. Cheers
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None54

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Re: VAWT new proto-type
« Reply #10 on: July 25, 2010, 05:51:03 PM »
To: Go vertical
I hesitate to post a picture right here since this you'r post, and also because I don't have a clue as to how to do it, I'll read up on the distructions and possibly send some to a new post.
You'r machine looks somewhat simular to mine and still different in manyways, but a Grand Lady she is...awsum, good work and keep the progress going, sooner or later one of us will make one that really performs like we dream it should...like Edison said...I have'nt failed 1000 times to make a light bulb...I mearly found 1000 ways on how not to make a light bulb.  Cheers

GoVertical

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Re: VAWT new proto-type
« Reply #11 on: July 25, 2010, 09:43:32 PM »
Greetings, posted new video.

http://www.youtube.com/watch?v=HXRkMVc7Q1M

wind speed 3 to 5 MPH.

To post pic's just use the Additional Options...  Best regards
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GoVertical

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Re: VAWT new proto-type
« Reply #12 on: July 26, 2010, 07:06:48 PM »
Greetings, completed fabrication of new hub assembly. The new hub will have 6 Blades. 5 blades just looked a little odd;) cheers




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GoVertical

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Re: VAWT new proto-type
« Reply #13 on: August 09, 2010, 10:52:43 AM »



Completed hub and spoke up-grade. I am using the same fabrication techniques as earlier. I am having difficulty drilling the required holes perpendicular to each other on the cylinder if anyone know a good shop method that will allow me to drill perpendicular holes on a cylinder please let me know.   
 
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TomW

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Re: VAWT new proto-type
« Reply #14 on: August 10, 2010, 07:26:53 AM »
(Attachment Link)


Completed hub and spoke up-grade. I am using the same fabrication techniques as earlier. I am having difficulty drilling the required holes perpendicular to each other on the cylinder if anyone know a good shop method that will allow me to drill perpendicular holes on a cylinder please let me know.   
 

Do not mistake me for a builder. But...

When I need a square hole through a cylinder [crosswise] I lay it in the bottom of a _V_ of material then center it under the bit in the drill press. Seems very good. I keep a jig like this on hand just for this use.

Tom
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DanG

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Re: VAWT new proto-type
« Reply #15 on: August 10, 2010, 08:14:18 AM »
Quote
a square hole through a cylinder [crosswise]


Keeping the table in the same height position for the whole task gets easier when aligning the V-notch jig if one uses a long fine drill-bit, say 1/16" or finer to decrease the margin of error. I keep a five-inch 1/16" drill bit just for starting bores that can't wander or walk off center too much...

GoVertical

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Re: VAWT new proto-type
« Reply #16 on: August 10, 2010, 07:17:25 PM »
Greetings, thanks for the shop tip. Once you have a set of holes in the cylinder how do make a second set of holes perpendicular to the first set of holes on the same cylinder? The project requires this so the vertical blade supports are perpendicular to the rotor drive plate. This is where I am having difficulty. Thanks in advance for any help received.
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wolfie

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Re: VAWT new proto-type
« Reply #17 on: August 11, 2010, 09:37:18 PM »
make a sqr wooden block....bore a hole the size of your pipe down its length...slip the pipe in it ...but it in your vice and drill thru the center...put a pin thru the hole, rotate the block 90degrees, drill the perpendicular hole

GoVertical

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Re: VAWT new proto-type
« Reply #18 on: August 12, 2010, 06:31:34 PM »
I completed case and rotors.  A 8 inch PVC fitting is being used for the case. I still have to mount magnets and wire stators. Stator will be wired as a 3 phase star configuration.  I only have room in the case for two stators and three rotors. Stators will be 6 coils per phase and the center rotor will have 12, 1by1 inch cylinders, N43 magnets and the top and bottom rotors will have 12, ½ by 1 inch cylinders, N43 magnets. I am concerned with the weight, it is going to be heavy. I order some corrugated plastic sheets to fabricated the new blades. This should help reduce the weight.  Hoping to start testing next weekend. 








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willib

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Re: VAWT new proto-type
« Reply #19 on: August 13, 2010, 11:44:56 PM »
Its good to see your still making these mechanisms  ,GoVertical

I was worried that i had talked you out of it  ;)
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GoVertical

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Re: VAWT new proto-type
« Reply #20 on: August 23, 2010, 09:15:35 AM »

Greetings, looking for a practical way to log accumulated amp hours. I can set up a old desk top and maybe write some VB code and use the compiler with Access to graph the real time results using a .DLL I was able to download to read the parallel port, but I still need a way to measure the values.  A low cost off the shelf item would be great, if not I maybe able to just use a ADC to measure voltage produce at the load and use code to produce the other values.

Side Project Criteria:

1. Measure wind speed
2. Measure power being generated
3. Plot Graphs on PC

VAWT project update:

Waiting for Coroplast order to arrive so new  blades fabrication can be completed. Fabricated all parts required for one 5 blade, one 6 blade VAWT, and 2 vertical stator PMA’s; one 2 stator 9 coil 3 phase that is 8 inch diameter and the other is a 3 stator 8 coil 3 phase that is 6 is inch diameter. I hope to complete testing before it snows. Comments welcome. Cheers 

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Bruce S

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Re: VAWT new proto-type
« Reply #21 on: August 23, 2010, 10:40:44 AM »
Looks like you're setup to have way too much fun  ;D.
I am a little curious, what are your magnet hubs made of?
It looks very similar to the plastic wood sold at H.D..

looks like its very user friendly including it will not need sealant to keep it dry.

Not remembering where you are located, but around here (St Louis) there's a whole bunch of leftover political signs that could be had of the picking up.

Cheers;
Bruce S



 
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GoVertical

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Re: VAWT new proto-type
« Reply #22 on: August 23, 2010, 11:28:18 AM »
Greetings, last post correction 6 coils per phase, not 9.  Yes the rotors and end caps are plastic decks boards purchased at Lowes. I use Gorilla glue to hold the magnets in place, it works really well and if a mistake is made the magnet can still be pushed out without damage using an arbor press. Great recycling tip about the signs.  The deck boards machine nice on the CNC router.
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Tritium

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Re: VAWT new proto-type
« Reply #23 on: August 23, 2010, 03:04:27 PM »
I am curious how you intend to complete the path for the magnetic flux using  plastic rotors ?

Thurmond

GoVertical

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Re: VAWT new proto-type
« Reply #24 on: August 23, 2010, 05:58:45 PM »
I am curious how you intend to complete the path for the magnetic flux using  plastic rotors ?

Thurmond


Greetings,  About a year ago I fabricated two identical PMA’s. The only difference was one with metal rotors and one using the plastic deck material for the rotors.  After testing I found no difference between the outputs.
When people started making their own PMA’s, using auto parts was a good source for prefabbed parts. Fabricating parts using the plastic deck material is just easier for me.  If you glue two magnets to a piece of Plexiglas and sprinkle metal shaving on the other side it will show the lines of flux between the two magnets with out the need for a piece metal.  I am sure many will disagree. 
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Tritium

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Re: VAWT new proto-type
« Reply #25 on: August 23, 2010, 06:50:16 PM »
Yes in your instance the flux follows the iron filing path but the flux lines will not do the same without the iron filings. Any iron in the path causes channeling of flux.

Thurmond

GoVertical

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Re: VAWT new proto-type
« Reply #26 on: August 24, 2010, 06:04:16 AM »
Greetings, yes some designs do require the presents of metal to redirect the lines of flux to work. This one does not.
Best regards
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