Author Topic: axial generator with lamination core (Read 114328 times)

Mary B · « **Reply #396 on:** February 08, 2021, 03:18:40 PM »

Rain doesn't always fall straight down... at time is goes by sideways... same for snow and ice... It WILL force its way into places you don't want it. Why all the ham stuff has weep holes. Tiny, to small for bugs to get in, but multiple holes in case one plugs.

mbouwer · « **Reply #397 on:** February 09, 2021, 12:12:10 PM »

How do they keep the moisture out at the large turbines?
An example of a first seal between the spinner and the nacelle.

Bruce S · « **Reply #398 on:** February 09, 2021, 05:13:02 PM »

The weep holes in the pic looks similar to a Tesla valve.

Bruce S

SparWeb · « **Reply #399 on:** February 11, 2021, 09:24:21 AM »

They are referred to as slinger seals
https://www.mcmaster.com/slingers/

Bear in mind that while a slinger can prevent moisture from entering the joint, it's not always perfect, and moisture may get in other ways.
So the weep holes are still needed.

mbouwer · « **Reply #400 on:** February 12, 2021, 11:06:33 AM »

Another study for a lightweight improved main bearing.
Angle contact bearing 2 raceways each with 67 balls 4 mm
I want to mount this one on the yaw bearing and make a new suspension for the stator.

SparWeb · « **Reply #401 on:** February 12, 2021, 07:58:49 PM »

If those countersunk screw heads give me a rough sense of scale, and the part is about 10 times the diameter of the screw head, then the part is about 3.5" (85mm) diameter.

mbouwer · « **Reply #402 on:** February 13, 2021, 04:53:15 AM »

It is about to make the components fit together.
Outer diameter of the main bearing here is 99 mm. The inner diameter must be large enough to enable a robust blade ajustment mechanism.

mbouwer · « **Reply #403 on:** February 14, 2021, 12:18:00 PM »

Standard bearings for the main shaft. Yet another setup.

kitestrings · « **Reply #404 on:** February 15, 2021, 08:27:03 PM »

Are those bearings for the rotor shaft (I assume this is what you meant), or for the yaw mechanism?

I'm curious if you do detailed drawings of the components you fabricate, or just work and rework directly in the materials? Very nice, either way.

mbouwer · « **Reply #405 on:** February 16, 2021, 03:54:08 AM »

It is a study with standard bearings to make a suitable main shaft.
Light weight and heavily over dimensioned so it will almost not wear and can last a very long time.

mbouwer · « **Reply #406 on:** February 18, 2021, 04:16:29 AM »

The main bearing based on 2 conjoined standard bearings 95 x 60 mm
It runs smoothly and has a grease nipple for relubrication if necessary.

mbouwer · « **Reply #407 on:** February 19, 2021, 03:44:11 AM »

Prefab parts for the suspension and the stator bracket.

mbouwer · « **Reply #408 on:** February 21, 2021, 01:31:00 PM »

A number of components are finished and painted so that I can assemble them.

mbouwer · « **Reply #409 on:** February 23, 2021, 03:38:04 AM »

Now I can continue with the blade suspension.

mbouwer · « **Reply #410 on:** February 25, 2021, 03:24:25 AM »

Shaping the housing. Within this I want to mount the drive for the blade ajustment and that of the yaw bearing.

SparWeb · « **Reply #411 on:** February 25, 2021, 11:20:35 PM »

So... what material are you using? I can't see any fasteners.
It looks like one of those materials made from calcium salts, petroleum jelly and aliphatic acids...

mbouwer · « **Reply #412 on:** February 26, 2021, 03:57:04 AM »

Later on I want to make the housing in polyester.
That is why I first made a mold from cardboard.

electrondady1 · « **Reply #413 on:** February 26, 2021, 08:25:20 AM »

mould making is something i studied. i recommend you use some premixed drywall compound and a foam sanding block to give the mould a nice flat surface. then coat it with some enamel. this will be a one off piece so it doesn't matter if the mould is destroyed during the separation process.

mbouwer · « **Reply #414 on:** February 27, 2021, 11:00:54 AM »

These are the components covered by the housing.
The connection must fit neatly to the laminationcore.
But if moisture does get in, it can be drained off in the gutter.

mbouwer · « **Reply #415 on:** February 28, 2021, 12:02:04 PM »

The suspension of the blades I would like to keep as light as possible. Therefore I want to shape a tubular basic ring.
6 pads on the circumference are intended for mounting the generator rotor.

mbouwer · « **Reply #416 on:** March 01, 2021, 02:07:31 PM »

Further shaping the blade suspension.

mbouwer · « **Reply #417 on:** March 02, 2021, 01:05:51 PM »

The blade suspension still needs to be reinforced. I want to do so after mounting the blade pitching mechanism so that I can work "around" that.

mbouwer · « **Reply #418 on:** March 05, 2021, 03:05:47 PM »

For the suspension of the blades I made shafts and hubs.
I can then continue with the blade adjustment mechanism.
Later on the hubs will be enclosed in the polyester blade roots.

mbouwer · « **Reply #419 on:** March 08, 2021, 12:06:03 PM »

The blade pitch movement mechanism is about the same as what I showed earlier in this thread.
On page 7 Reply # 179 March 2019
But for the drive I would like to make a suitable direct drive motor.

kitestrings · « **Reply #420 on:** March 08, 2021, 08:49:22 PM »

Does the blade suspension get connected in some fashion on the side farthest from the tower? (Is that upwind?) I'm having trouble picturing how the rotor forces get transferred at the hub.

mbouwer · « **Reply #421 on:** March 09, 2021, 08:24:13 AM »

The aim is to make the blade suspension ridgid and light.
The blade supported in 2 places on a pivot.
I think it is also possible with a wooden blade, and I would now like to apply that too.

MattM · « **Reply #422 on:** March 10, 2021, 07:35:21 AM »

What's your ETA to final assembly?

mbouwer · « **Reply #423 on:** March 12, 2021, 02:59:29 PM »

Several components have yet to be made. I now have a wooden blade with the blade hub incorporated in the root.

mbouwer · « **Reply #424 on:** March 13, 2021, 12:39:14 PM »

This one wooden blade is made to be able to continue with the pitching mechanism.

kitestrings · « **Reply #425 on:** April 18, 2021, 09:09:42 AM »

Any updates mbouwer? I have enjoyed following your progress, but you gone quiet lately. ~ks

mbouwer · « **Reply #426 on:** April 19, 2021, 11:37:45 AM »

My impression is that there is not so much interest on the forum in developing and improving active pitch control.
And I am a little concerned about that because it is incredibly important that the turbine is automaticly under control in all conditions.

Mary B · « **Reply #427 on:** April 19, 2021, 02:41:28 PM »

Furling is simpler to do with basic tools... I do not have the skills to shape metal like you!

electrondady1 · « **Reply #428 on:** April 19, 2021, 05:26:53 PM »

don't imagine a lack of comments to be a lack of interest. your machining and welding skills are very advanced and impressive . i am looking forward to the time your machine is finished and you can give us a video of it.

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Author Topic: axial generator with lamination core (Read 114328 times)