Open Source Ecology Heat Exchange Coil Winding, 2 Feb 2012

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From YouTube: Coil winder 3

Description

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B

Here's our drive hub that we tie into fit to make the table turn.

B

There are four quarter inch bolt holes at.

B

C

90 degrees.

B

Apart, okay, now we have ready to put a new key in this yeah he's going to shoot up, which I should probably do, because that actually the table locates on that key and our dies.

B

B

Locate on that key.

B

This wouldn't this would not be necessary if these holes were perfectly aligned but they're off a little bit, because.

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B

The equipment that we have here isn't- and my experience is not enough- that I could get those exactly 90 degrees apart.

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B

So, in order to make things go quicker, we just just.

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B

A

So all the structure here essentially supports their spacers, so there's the yes there's the bearing and what it is. That's a spacer there or.

B

Is that that shaft into in on location, this.

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Does that's just a spacer spacer.

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The table up off to work.

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Up above the channel spacer and then that's the pin in that call.

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Keyed on the shaft as well mm-hmm.

A

And you did the internal key way there, or there was already key.

B

That's already in the shaft, we ordered it that way like you can do, but, but you can, you can put that shaft in a mill yep like that and make that key way did.

A

You make the keyway on the inside, so you cut this from a flat shut this yet.

B

I used a plasma cutter to cut this uh-huh.

A

And then you put the key way in hell.

B

And then yeah, then I just I just filed a key way in oh just file that I just filed it by hand uh-huh and then and then before.

A

You can use a brooch right. Yes,.

B

You can that's a more a more effective, more precise way, but for what we're doing is you know, precision isn't really an issue in this part of it. Yep.

A

Okay- and this you made from we.

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Will talk of aluminum turn this out yet just turn this out on the lathe and then made this in the mill and then bolted it in.

A

So this this piece of aluminum you just milled out completely under.

B

I'll just well I cut it cut it first, with a band saw to get it to the rough shape and then finished it with the mill and then to get it smooth like this and use that belt sander to make these surfaces smooth on.

A

The middle, how do you get that angle you're just too just by hand, and just you just did it totally by hand or is there.

B

Some jig yeah, no, no jig just.

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B

Not doing anything mass production, so it was just something that you know. If you're going to make a whole bunch of these yeah you'd want a jig and then you could you know, then you can just put it on it. Even on a rotary table.

B

You could put it on something like that belt sander with a with a shaft and then just turn. It yeah.

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B

A

Aluminum just imagination.

B

And it's what we had: okay.

A

So that could be steal. Some of.

B

Our other guys are made out of.

B

And that's all one piece.

A

That's plastic or so.

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Yeah, it's a synthetic. It's a material used to simulate would.

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B

This we just I just took a compass and drew my circle over.

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Can you can still see the pencil mark on the bolt hole diameter yep.

C

B

Then and then then I drew the bigger circle and then the elliptical part, so that we come around the outside of that first wine in the coil mm-hmm.

A

And you have different ones for this. This is for.

B

One passenger 38 uh-huh Sears, there's a half inch, there's 38.

B

There's quarter inch, that's made out of nylon.

B

This is and what we did is we went to an auction and there was a whole bunch of this stuff that they had for first I rostock and they just sold it both okay and we got four or five thousand dollars worth of raw materials for a hundred and fifty dollars. Sometimes you luck out, and things like that. So.

C

B

You're interested, we have plenty I'll, let you take some home with you, mmhmm.

A

Yeah yeah excellent is.

B

There, let's see, see, there's something else we made. I think I just used that to do some hairpin turns.

B

These were actually made for another table that someone brought here uh-huh.

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B

A

The pipe inside yeah.

B

Just you make that first Bend on that bender and put it in here and then and then draw it around like that yep. This is just a copy that we made so.

A

You basically took for this. You just took the menu, the mill under manual control and you just build it out. Yep, uh-huh and CNC would get it really. Nice.

B

So yeah, if you use the CNC or a laser cutter yeah, you know they're even doing things with high-pressure water. Now now what.

A

B

Arkeen boiler over here actually took these and had them made by a fab shop uh-huh, because we needed a precision, a precision diameter in here and precision, radius, uh-huh. So.

A

How do they do that? Is that a grinder um I don't know.

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B

Don't know how they cut okay,.

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They're there sense that they've got a hundred of CNC machines there, that they got going around the clock and it was more cost effective to just have them. Do it then, for me to do it here at the shop uh-huh.

C

B

It just working with some pretty basic stuff yeah.

B

We fabricated this boiler every every bit of it ourselves with that coil winder right there and we brought we have all the way from quarter inch up to one inch tubing and it's all black pipe and it's all schedule 80, because we're running well over 500 psi inside this thing at any given time. In fact, we, ideally you want to run at about 800 psi for that engine.

B

That's in that car and 800 degrees, and that's what you that's, what you try to keep your your steam temperature and steam pressures at, but this the superheater down down here is scheduled. 160, oh well, and we did all of that on that winder right there still in the same line to okay, yeah.

A

So that could go up to 160 schedule 164 one inch. Yes,.

B

And it actually handled it quite well.

A

What we're doing for ours that's schedule.

B

40 s schedule 40; okay, because you're going to be running lower, lower pressures and lower temperatures, yep honest on an engine as small as yours. You don't need an official that one that Gary's that Gary has is designed to run at lower pressures in lowertown yep.

C