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Author Topic: Navitron,s little 200watt wind turbine.  (Read 6660 times)
biff
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« on: August 15, 2013, 10:50:31 AM »

Some of our members purchased the little 200watt wind turbine with the straight blades,
                                   I just thought I would mention fitting these blades for the first time.It might appear that the holes dont line up but if you look from the tip of the blade down to the hub and enter the two bolts on the left,through their brackets,blade and into the hub. Then have alook to see how the other holes line up.You can steer the blade holes over the remaining holes in the hub by applying pressure on the first two bolts as the blade is bolted down into the curve in the sock.Dont be afraid to tighten up the bolts properly(within reason),You might still find a gap between the back of the blade and the sock of the hub so it makes good sense to put a decent dollop of sealent across the sock before finally bolting on the blade.
     Balancing these blades is much earier than any other.You just remove a small fraction from the tip untill they are perfect.If you live in a very exposed area and you dont want your turbine working at max all the time,you can lop off a few inches to prevent overspeed.If you do the figures and look at the span involved for a 200watt wind turbine hysteria,you will soon realise that overspeed is indeed very possible.7ft +, Grin.
     These are great little performers and if they are set up properly they will give years of service.One other thing. There are vent holes on the front face where the little brass greasing nut is situated.Be very carefull to place your turbine in a clean area while working on it,those  vent holes invite wayward screws etc so you need to keep and eye on that. You will find that these babies will outperform the fancy dans any day. Good luck,                        Biff
« Last Edit: August 15, 2013, 10:54:07 AM by biff » Logged

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camillitech
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« Reply #1 on: August 15, 2013, 09:00:08 PM »

Well Biff,

I finally 'joined the club' on Wednesday and picked up my 200w 'baby' on the way back from the Clyde. Baby  hysteria  hysteria it's a feckin monster at almost 25kg with massive bearings to suit. I had it in bits faster than you could 'lower your wind turbine'  hysteria and I can see it's got potential once I've changed all the bearings for proper ones (three of them didn't pass CM's 'file test' and the third was pretty rough). The alternator looks good enough with even resistance and producing respectable voltage when turned. However the welding looks like it's been done by a pigeons bottom and the cast hub has a huge flaw in it  Roll Eyes



Still, at 50 I can't complain and look forward to getting it 'up and running', perhaps with shortened blades right enough.

Cheers, Paul
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biff
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« Reply #2 on: August 15, 2013, 09:25:24 PM »

Best of luck with your new baby Paul hysteria
                                       The hub does look a bit chewed up.I wonder if putting a flat metal ring round the inside of the hub face and connecting it to the inside flat brackets(weld)somehow,would strengthen up the whole hub.There might be a better way.
    I wonder how much you will have to lop of the blades,?        7ft for 200watt freeze.
                                                             Biff
                                                                   
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« Reply #3 on: August 15, 2013, 09:26:44 PM »

"changed all the bearings for proper ones (three of them didn't pass CM's 'file test' and the third was pretty rough)."

 Grin Grin


Bravo, Paul, endless hours of fun!!!!!
« Last Edit: August 15, 2013, 09:28:50 PM by clockmanFR » Logged

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camillitech
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« Reply #4 on: August 15, 2013, 09:30:45 PM »

"changed all the bearings for proper ones (three of them didn't pass CM's 'file test' and the third was pretty rough)."

 Grin Grin


Bravo, Paul, endless hours of fun!!!!!

Had to laugh CM, one of them even had 'NSK Japan' written on it  hysteria  hysteria put me in mind of a post you made some time ago about counterfeit products  Roll Eyes
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« Reply #5 on: August 15, 2013, 09:44:57 PM »

Are these 48V turbines?
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biff
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« Reply #6 on: August 15, 2013, 09:46:37 PM »

24v stephendv,
                Biff
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« Reply #7 on: August 15, 2013, 09:47:48 PM »

Planned to hide mine in the loft till I need it, picked up a tower too for the price that was being asked!

Might have to get it out and take a gander!

Worth a read of some mods here to:  http://www.thebackshed.com/windmill/articles/ChineseBlades.asp

Jon
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« Reply #8 on: August 15, 2013, 09:52:23 PM »

Planned to hide mine in the loft till I need it, picked up a tower too for the price that was being asked!

Might have to get it out and take a gander!

Worth a read of some mods here to:  http://www.thebackshed.com/windmill/articles/ChineseBlades.asp

Jon

Fantastic link Jon, I've been trying to find a similar one all day http://www.ecoinnovation.co.nz/pdf/Chinese%20Turbine%20-%20Brief.pdf but it's vanished. I'll post all the bearing numbers once I've ordered them  Wink
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'Off grid' since 1985,  Proven 2.5kW, Proven 6kW direct heating, SI6.OH, 800ah Rolls, 4.75kW PV ,4xTS45, Lister HR2 12kW, , Powerspout pelton, Stream Engine turgo, 60 x Navitron toobs and a 1500lt store. Outback VFX3048 and 950ah forklifts for backup,
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« Reply #9 on: August 15, 2013, 09:54:11 PM »

Are these 48V turbines?

They're 24v Stephen but I'm going to 'AC couple' mine with one of those carp GTI's off eBlag
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« Reply #10 on: August 15, 2013, 09:55:32 PM »

Are these 48V turbines?

They're 24v Stephen but I'm going to 'AC couple' mine with one of those carp GTI's off eBlag

Cunning plan.  Will those inverters work with a wind turbine?  They don't look as though they can be programmed with a power curve.
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« Reply #11 on: August 15, 2013, 10:04:00 PM »

Planned to hide mine in the loft till I need it, picked up a tower too for the price that was being asked!

Might have to get it out and take a gander!

Worth a read of some mods here to:  http://www.thebackshed.com/windmill/articles/ChineseBlades.asp

Jon

Fantastic link Jon, I've been trying to find a similar one all day http://www.ecoinnovation.co.nz/pdf/Chinese%20Turbine%20-%20Brief.pdf but it's vanished. I'll post all the bearing numbers once I've ordered them  Wink

Try here mate

http://web.archive.org/web/20110428211313/http://www.ecoinnovation.co.nz/pdf/Chinese%20Turbine%20-%20Brief.pdf

Really handy website that!

Jon
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« Reply #12 on: August 15, 2013, 10:04:23 PM »

There's plenty of videos on YouTube of folks doing it and Billi has done it with his. The inverters are horribly inefficient, illegal (for grid connection) and prone to failure but they do produce the goods at very low wind speeds and price. Got to be worth a try just out of curiosity Stephen.

Cheers, Paul
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« Reply #13 on: August 15, 2013, 10:13:34 PM »

Planned to hide mine in the loft till I need it, picked up a tower too for the price that was being asked!

Might have to get it out and take a gander!

Worth a read of some mods here to:  http://www.thebackshed.com/windmill/articles/ChineseBlades.asp

Jon



Fantastic link Jon, I've been trying to find a similar one all day http://www.ecoinnovation.co.nz/pdf/Chinese%20Turbine%20-%20Brief.pdf but it's vanished. I'll post all the bearing numbers once I've ordered them  Wink

Try here mate

http://web.archive.org/web/20110428211313/http://www.ecoinnovation.co.nz/pdf/Chinese%20Turbine%20-%20Brief.pdf

Really handy website that!

Jon

That's the one Jon,  genuflect  genuflect you're a star
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biff
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« Reply #14 on: August 15, 2013, 10:26:32 PM »

Great link Jon,
               He says he puts the cord effect 15mm back from the leading edge but it has been my experience that the cord effect is smack on the leading edge.
  Maybe it dont makle any difference,perhaps those solid blade which are a different shape, requires the cord to be in a different place but the big hollow chinese blades have all got the cord on the leading edge itself.
      It quite strange really,its been quite a few years since I found out why the cord was added to the leading edge. You could not fly these big hollow blades without it,You could not listen to them.Yet with the cord fitted(even not perfectly straight)they go completely silent.Weird,!!
                                                                         Biff
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