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Pt w/field Matt

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Joined: 24/02/2006
Location: Australia
Posts: 105

Posted: 09:02am 23 Nov 2006

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hi ya all down at the local plumbing and bearing shops and worked out a way to make slip rings using of the shelf bits with not to much machining,they consist of a 1 inch and a half plastic nipple and 2 brass end caps of the same size.the nipple has 30mm bore size that matches a 6006 bearings and with some machining of a 2 inch pivet pipe,the brass end caps need the ends bored to 32.5mm and the hex nut machined off for clearance inside the 2 inch p/pipe,they come with a nice machined surface for brushes, the nipple can be screwed to the 30mm pivet pin in the centre of the nipple,bosch starter motor brushes and holder can be screwed or welded to the 2 inch pivetpipe,will do tomorrow at tafe and send some pics to gizmo but you get the picture of the concept

matt down south

Gill

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Joined: 11/11/2006
Location: Australia
Posts: 669

Posted: 09:30am 23 Nov 2006

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Hi matt, will be looking for a slip ring setup shortly but can't grasp your concept. Even a sketch would make the penny drop.

was working fine... til the smoke got out.
Cheers Gill _Cairns, FNQ

Pt w/field Matt

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Joined: 24/02/2006
Location: Australia
Posts: 105

Posted: 11:37am 23 Nov 2006

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hi Gill yeah a picture sezz a 1 k words,cant sketch dont know how to drive computers!!ok the nipple goes on the pivet shaft atactched to the tower,the machine brass END caps screw on to eiver end of the plastic nipple,the pos & neg wires attatch to these end caps which are bored out to clear the pivet shaft,the car starter motor brushes contact these end caps and the insulated brush holders are attatched to a larger diameter pipe which is part of the w/gen frame,the large diameter pipe is machined to 55mm at top & bottom to take pivet bearings 6006.see innovations site under information/smart drive maintainance or wait till of done it & sent some pics to glen & maybe he can post it

matt down south

Pt w/field Matt

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Joined: 24/02/2006
Location: Australia
Posts: 105

Posted: 12:13pm 23 Nov 2006

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gill just looking at the innovation site & go to information and check all the chinese and smart wind turbine sections under wind [1200/1600KB pfd] and products under wind theres tons of pics to see

matt down south

Pt w/field Matt

Senior Member

Joined: 24/02/2006
Location: Australia
Posts: 105

Posted: 11:04pm 24 Nov 2006

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p.s guys those fittings are one inch and a quarter or 32mm

matt down south

Highlander

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Joined: 03/10/2006
Location: Australia
Posts: 266

Posted: 07:34am 30 Nov 2006

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Hey Matt, I picked up this today, the auto sparky said they're called a brush box. you could cut/bend/weld into place. Should be handy for mounting.

It's a bit hard to see but the brushes are in a cradle and spring tensioned.

Central Victorian highlands

Pt w/field Matt

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Joined: 24/02/2006
Location: Australia
Posts: 105

Posted: 08:14am 30 Nov 2006

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hi highlander you use the 2 insulated brush holders and weld or bolt to the pivet pipe,do you know how to post pics onto this site?send me a email mjcolley@iinet.net.au with your address and ill send some pics for you to post,i dont know have to drive computers but would like to get the pics posted on this site for all to see

matt down south

Pt w/field Matt

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Joined: 24/02/2006
Location: Australia
Posts: 105

Posted: 11:02am 11 Dec 2006

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hi all finished the slip rings the other day and sent the pics to hilander to post so you should be able to see them soon so the penny drops

matt down south

Highlander

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Joined: 03/10/2006
Location: Australia
Posts: 266

Posted: 07:54am 15 Dec 2006

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G'day all, although I'm the one posting the pics this is Matt's project, I just scanned & put them here for him.
Direct all questions to Matt please.

Matt, nice work, what are the brass bits called and where did you get them?

Central Victorian highlands

Pt w/field Matt

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Joined: 24/02/2006
Location: Australia
Posts: 105

Posted: 08:11am 15 Dec 2006

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-hi highlander thanks for posting the pics, the brass bits are called 32mm brass end caps you get them at plumbing stores and cut/machine the end off i also machine a small groove in the end for the wire to be soldered into.use 4 by 4mm grub screws to stop them coming off the 32mm plastic pipe nipple

matt down south

Highlander

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Joined: 03/10/2006
Location: Australia
Posts: 266

Posted: 08:29am 15 Dec 2006

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Thanks Matt, never seen the end caps before and I was wondering what the hell you meant by plastic nipple, I asked the bloke at reece and he just looked at me funny. I think they are called a threaded male union down here, when I got the pics it all made sense.
You didn't send very detailed pics of the brushes. How did you insulate them from the metal pipe they're mounted on?

Central Victorian highlands

Pt w/field Matt

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Joined: 24/02/2006
Location: Australia
Posts: 105

Posted: 08:37am 15 Dec 2006

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hi highlander on the brush box there are 2 pairs of brush holders,get the pair with insulating washers on the other side of the holders,check with your m/meter,or get the pair the brushes are not attacched to the brush box plate

matt down south

Gill

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Joined: 11/11/2006
Location: Australia
Posts: 669

Posted: 11:11am 15 Dec 2006

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Thanks Matt, now can see what you have acheived. simple cheap, effective. Good work.

was working fine... til the smoke got out.
Cheers Gill _Cairns, FNQ

Highlander

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Joined: 03/10/2006
Location: Australia
Posts: 266

Posted: 07:37pm 15 Dec 2006

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Here's a close up of the brushes

Central Victorian highlands

brucedownunder2
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Joined: 14/09/2005
Location: Australia
Posts: 1548

Posted: 08:41pm 15 Dec 2006

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Nice work Matt, what did you get the brush holders out of ?.
Also , measure the resistance between the leads and the brass rings--you'll find if you scrounge some starter brushes to fit the holders ,they are manufactured with a high copper content and therefore have a lower path resistance ,which is important ,especially if the mill is a couple hundred metres from the battery bank.
I built a 3 ring slip-ring unit way back ,but gave up ,it was too lossy,use the "cable down the centre tube" now ,seems to work ok

Bruce

Bushboy

Pt w/field Matt

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Joined: 24/02/2006
Location: Australia
Posts: 105

Posted: 01:28am 16 Dec 2006

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hi bruce the brush holders are out of a bosch car starter motor,70 to 80 model aussie cars used them so should be plenty at tips auto wreckers auto sparkies.the brushes have no resistance which is good for our purpose[ingram part no 9823]and are ground at a good radius for the 32mm end caps

matt down south

Feral
Newbie

Joined: 03/12/2006
Location: Australia
Posts: 39

Posted: 12:41pm 17 Dec 2006

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Matt, Can I ask what will happen when the heat from the brushes on your slip rings is transferred to the plastic nipple.

The brass fittings you have used are brass sockets and one socket cut in half is what yours appear to be

These plastic fittings are not bullet proof and will melt, I would suggest that you find a more suitable heat resistent material for the insulating sleeve.

Maybe some kind of fibrious circular baring material from a baring supplier with a tread cut into to out side the same as the thread of the brass socket.

Then after the thread is cut and it is a tapered thread, the same as the threads on the plastic nipple you have used, you could split the material on one side so that the brass socket locks the fiborious insulator in place on the shaft as you tighten it up on the tapered thread.

Just a thought.

Pt w/field Matt

Senior Member

Joined: 24/02/2006
Location: Australia
Posts: 105

Posted: 10:54am 19 Dec 2006

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hi all just done a load test of 500watt @12 volts on the slip rings for the benifit of the sceptics out there,the results stuff all temp change as i pedicted,the test was done long enough to boil water in a 12v camp jug soo now we all know.as to what i made the rings out of i USED brass end caps and not pipe joining sockets

matt down south

Feral
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Joined: 03/12/2006
Location: Australia
Posts: 39

Posted: 12:21pm 19 Dec 2006

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Matt, My post was not meant to offend as I was only attempting to point out that tempreture could effect the plastic nipple. It wont happen again and I must have been mistaken about those brass endcapps as they appear to be missing the caps. After fourty years in the plumbing game they look like sockets to me.

Pt w/field Matt

Senior Member

Joined: 24/02/2006
Location: Australia
Posts: 105

Posted: 01:21pm 19 Dec 2006

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hi feral there end caps with the ends machined out to allow for the wires to be soldered into, sockets are not wide enough for the length of the car starter brushes,these brushes have a very large capacity for high amps[351 cleveo cold start 500amps]and a large contact area,the same goes for the end caps of used so the tiny 40 amps a f&p can produce is no problems for this set up,check the small brass terminal end thatis attatch to your car alternator and you will what i mean and modern cars run at 85 plus amps

matt down south

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