Author Topic: axial generator with lamination core (Read 114286 times)

mbouwer · « **Reply #561 on:** January 18, 2023, 12:09:12 PM »

Prefabrication of the top section of the conical mast from concave strong steel binding tape 16 x 1 mm

mbouwer · « **Reply #562 on:** January 20, 2023, 09:17:34 AM »

The top section of the mast. Now I can put the yaw bearing on it and fasten the main bearing.

mbouwer · « **Reply #563 on:** January 20, 2023, 09:34:16 AM »

25 kg iron on the foot for stabilization.

mbouwer · « **Reply #564 on:** January 21, 2023, 01:59:41 PM »

The yaw bearing sits with a conical fit on the mast. Now the main bearing suspension.

mbouwer · « **Reply #565 on:** January 23, 2023, 08:29:23 AM »

Stifened rear magnet ring. Outside diameter 170 mm.
A light weight tube made of 1 and 2 mm sheet steel.

mbouwer · « **Reply #566 on:** January 23, 2023, 08:43:19 AM »

With fixing ring. 522 grams.
My intention is to glue 30 magnets 20 x 10 and 5 mm thickness on it.

mbouwer · « **Reply #567 on:** January 24, 2023, 09:38:40 AM »

To compose the iron cores in my 27 coils, I'm now cutting these teeth out of the lamination package of a discarded three-phase motor.

The distance between the magnets should then become 13 + 1 mm.

mbouwer · « **Reply #568 on:** January 25, 2023, 11:41:37 AM »

From experience with making the stator with 45 coils (page 3 of this topic) and gluing the magnets I know that it is better to save that for later.
Therefore I will first continue with the blade suspension.

mbouwer · « **Reply #569 on:** January 27, 2023, 03:59:21 AM »

Yaw bearing, main shaft and rear magnet ring assembled on the lattice mast (I will cover the mast with polyester)
Front magnet ring positioned with 24 mm spacing.
I now want to continue with the blade suspension.

mbouwer · « **Reply #570 on:** January 28, 2023, 09:43:36 AM »

Around us we see more and more windmills and they all have blade adjustment.
I'd like to discuss some thoughts on that.

kitestrings · « **Reply #571 on:** January 28, 2023, 07:04:28 PM »

I admire your persistence mbouwer, and you fabrication skills. I've shared in the past that I am not a fan of variable-pitch designs for small-scale turbines due to the complexity that it adds, but you may get someone else here that has interest. Best, ~ks

mbouwer · « **Reply #572 on:** January 29, 2023, 05:42:14 AM »

Several windmill friends here on this forum manage to use wind energy.
It inspires me to think about the use of blade adjustment as I see in professional windmills.

kitestrings · « **Reply #573 on:** January 29, 2023, 07:56:37 AM »

I wonder how midwoud1’s turbine is doing. He had had a pretty nicely designed and executed turbine with variable-pitch.

mbouwer · « **Reply #574 on:** January 30, 2023, 01:26:12 PM »

As far as I know Midwoud has temporarily put away his turbine.
This is one of his ball bearing blade suspensions.

JW · « **Reply #575 on:** January 30, 2023, 01:32:20 PM »

I am amazed with his casted parts.

JW · « **Reply #576 on:** January 30, 2023, 06:33:25 PM »

Quote

https://www.otherpower.com/otherpower_wind_tips.html

I'm working on the graphics at the top of the page with solidworks 2000 want to republish them.

JW · « **Reply #577 on:** January 30, 2023, 06:44:52 PM »

https://www.fieldlines.com/index.php/topic,145700.msg996793.html#msg996793

see there there

mbouwer · « **Reply #578 on:** January 31, 2023, 09:10:14 AM »

The professionals bolt the blades onto a slewing ring.
But I don't think that's an option for small windturbines.

Mary B · « **Reply #579 on:** January 31, 2023, 12:38:56 PM »

A "small" 6 inch slewing ring runs around $1k... I need one for the 10ghz eme dish project

joestue · « **Reply #580 on:** January 31, 2023, 02:08:50 PM »

slewing ring as in a crossed roller bearing?
https://www.ebay.com/itm/134125057078 100 mm ID x 116 mm OD x 8 mm WD

NRXT15025 Crossed Roller Bearing 150x210x25mm
https://www.ebay.com/itm/193821862458

mbouwer · « **Reply #581 on:** February 01, 2023, 04:45:32 AM »

Thanks for the information. The bearing should be about 50 mm in diameter here.
I now want to try to make a lightweight rubber bearing.
With pieces of a poly-v belt as insert.

leviatan · « **Reply #582 on:** February 01, 2023, 06:59:09 AM »

a pilow block mounted ball bearing of 60mm bore size cost around usd 9 by piece in china.

i know that, because i bought 40 pieces two mount before.
And that kind of bearings are designed to hold forces in the two axis, radial and axial. i dont know his price in USA.

mbouwer · « **Reply #583 on:** February 01, 2023, 08:09:33 AM »

@Leviatan,

What I'm thinking of is a 50mm outside diameter bearing for a blade bearing.
(The blade only needs to turn 90 degrees)
With as little iron as possible because otherwise it becomes much too heavy.
Weight is a scourge for a windmill.

Mary B · « **Reply #584 on:** February 01, 2023, 11:50:43 AM »

Quote from: joestue on January 31, 2023, 02:08:50 PM

slewing ring as in a crossed roller bearing?
https://www.ebay.com/itm/134125057078 100 mm ID x 116 mm OD x 8 mm WD

NRXT15025 Crossed Roller Bearing 150x210x25mm
https://www.ebay.com/itm/193821862458

Good point, I was thinking a slew drive with motors...

mbouwer · « **Reply #585 on:** February 02, 2023, 09:11:49 AM »

The blade shaft and hub with the rubber bearing (373 grams)
The shaft is supported in the nut and in the rubber ring (54 mm inside diameter)
to be able to turn its 90 degrees.

mbouwer · « **Reply #586 on:** February 03, 2023, 02:38:12 PM »

Now that I have attached the contours of the blade root to the blade axle, it is also possible to mount a wooden blade.
I will fill the root with 2 component foam, shape it with sandpaper and then a thin layer of polyester.

mbouwer · « **Reply #587 on:** February 04, 2023, 02:57:57 PM »

For now I want to make this set up with 1 blade.

mbouwer · « **Reply #588 on:** February 05, 2023, 05:33:25 AM »

Blade head with 1 blade hub.

mbouwer · « **Reply #589 on:** February 05, 2023, 05:57:52 AM »

Connection bracket between the yaw bearing and the main shaft.

mbouwer · « **Reply #590 on:** February 06, 2023, 02:35:48 PM »

The contours of the blade filled with construction foam. Now I can cut off the excess and then sand it.

mbouwer · « **Reply #591 on:** February 08, 2023, 02:38:53 PM »

The parts brought together on the top of the mast.
I'm now shaping a counterweight opposite the blade.

mbouwer · « **Reply #592 on:** February 09, 2023, 03:09:44 PM »

The tripod for the blade-counterweight.

mbouwer · « **Reply #593 on:** February 10, 2023, 03:05:53 PM »

Tripod and blade counterweight (1086 grams)

The layer of polyester will make the blade a little heavier and then I will have to add a little iron to the counterweight for balance.

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Author Topic: axial generator with lamination core (Read 114286 times)