My new cyclone separator lid design

I've been working on this for some time: A cyclone separator lid that approaches true cyclones in separation efficiency and is scrub-proof.
http://www.cgallery.com/jpthien/cy.htm
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On Nov 24, 2:07 pm, snipped-for-privacy@gmail.com wrote:

I tried to post a note on your forum software. It just went into la-la land and would not accept it. So I'll post it here.
I read about the idea of expanding your design to 4" hose sizes, implying use with a fullsize dust collector. I read about the problems you were trying to solve - but all of these were manifested with shop vac -2.5" size implementations. I do not think the carrryover problem you solved exists with larger scale dust collector solutions. The traditional trashcan solution for a fullsize dust collector uses 4" hoses and a 30 gallon trash can, which is considerably taller than the 10 gallon can you used. I have used a 30 gallon trashcan with a homemade lid and a 2 hp Jet dust collector for years. I never experienced the carryover problem you mentioned. My lid looked just like yours, except it has no baffle. I suspect it works as well as it does because its so much deeper and a larger diameter.
Bob
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Sorry about that. I'll test it some more.

Thanks Bob. Interesting observations. I have personally witnessed horrific scrubbing in shops I've visited, even with the 30-gallon cans. Many people I know only use the cans with their planers because they can't keep anything smaller than very large chips in their cans.
But I will do testing w/ and w/o the baffle when I finish building my larger model.
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On Sun, 25 Nov 2007 17:23:21 -0800 (PST), snipped-for-privacy@gmail.com wrote:

I've been using a shop-made separator with my Harbor freight DC for years.. Just a plywood top on a cardboard 50 gal. drum, 1 straight inlet in the center, on 90 degree elbow on the outer edge.. no baffle, etc.. Used with lathe and band saw and palm sanders, mostly.. I empty the drum every couple of months and check the DC bags once a year and they've never collected enough to tell that they did...
All 4" fittings on the Can and tools, except a 2 1/2" nozzle on the lathe..
mac
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mac davis wrote:

According to Bill Pentz, this type of design doesn't work with 800+ cfm. The increased airflow just scours the drum.
Chris
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You're way over my head, Chris.. I just know it works and have no idea why.. lol
mac
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Well if it works that's great. I'm not here to fix what works, just provide a possible solution for people that may not be as happy with their setup as you.
Sorry if I somehow offended anyone by posting.
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On Mon, 26 Nov 2007 15:04:02 -0800 (PST), snipped-for-privacy@gmail.com wrote:

Please don't take my posts wrong.. I understood that you were researching designs and wanted examples of what folks used.. sorry..
mac
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Me too, Bob.. Just posted for another "vote" for the OP..
mac
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