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Post by turboron on Oct 26, 2018 7:43:51 GMT -5
All, my blower is a Cyclone blower supplied by Air Supply Florida. It is a bypass multistage centrifugal I think. It is used to blow out (winterize) pool lines and as a vacuum pump to install pool liners. It has a 1 phase 110 volt motor. I will see if I can get an rpm when I am in the shop this afternoon. My guess is it is 3600 rpm. Someone on the Yahoo site mentioned it in a post a few years ago. They said it would start large DIYs like John's. I love it.
One of these days, I will see if it can be convert to 12 volt using azwood's idea.
Thanks, Ron
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Post by turboron on Oct 26, 2018 13:20:21 GMT -5
All, I did not find a nameplate with the motor rpm on the blower so I call Air Supply Florida. The blower impeller is 8.4" and runs at 25,000 rpm. It is a universal brushed motor. The rotor is of the radial outflow type where to air enters the center and is turned radial outward through the first set rotor blades. It then passes through a set of stationary vanes. Next it goes through a second set of rotating bladess before it is ducted to exit tangentially. Interesting.
Thanks, Ron
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Post by turboron on Oct 26, 2018 17:03:12 GMT -5
I did a google search on a "universal brushed motor" this evening. Very interesting. These motors can run on both ac and dc current. Many car engine starters are universal motors.
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Post by azwood on Oct 26, 2018 22:07:27 GMT -5
The gearbox I use is on eBay $25. Search mini bike gearbox I only need 10.000rpm to get enough air to start mine so as long as the starter motor has enough power it should be fine its a cheap way to do it.
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Post by racket on Oct 26, 2018 23:36:40 GMT -5
Hi Aaron
The Nippon Denso starter I cannibalised, ( by removing its gearbox) for my original 12/118 starter has a no load armature speed of ~20,000 rpm so best power would be at around half that at say 10,000 rpm .
Cheers
John
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Post by azwood on Oct 27, 2018 0:56:38 GMT -5
OK that might be better than what I have now
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Post by azwood on Oct 27, 2018 1:00:30 GMT -5
OK that might be better than what I have now What car was that from |
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Post by racket on Oct 27, 2018 2:25:50 GMT -5
Hi Aaron
The original starter was a Camry SV-21 starter , this was direct drive from the armature to the comp nut , as it spun in the correct direction , with 12V it spun the engine to ~6,000 rpm with full 70 psi oil pressure , on 24 V it jumped to 10,500 rpm , this was a 1Kw starter .
The next starter was a 1.4Kw from a Camry , Celica, Corona , it needed to spin in the opposite direction so that with a 1 stage step up gearbox fitted its output was correct for connecting to the comp nut.
So you'll need to check on the direction of your fan , it appears to be anticlockwise looking from the inlet side
Cheers
John
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Post by enginewhisperer on Oct 27, 2018 4:56:07 GMT -5
All, I did not find a nameplate with the motor rpm on the blower so I call Air Supply Florida. The blower impeller is 8.4" and runs at 25,000 rpm. It is a universal brushed motor. The rotor is of the radial outflow type where to air enters the center and is turned radial outward through the first set rotor blades. It then passes through a set of stationary vanes. Next it goes through a second set of rotating bladess before it is ducted to exit tangentially. Interesting. Thanks, Ron That's an interesting machine! I haven't seen one like that. I would have thought with 3hp it wouldn't have a lot of flow - but the high pressure might make up for it a bit  |
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Post by azwood on Oct 27, 2018 5:29:44 GMT -5
Finding a Camry one shouldn't be hard thanks the one I have I sent in good shape so I'll try that
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Post by turboron on Oct 27, 2018 6:04:59 GMT -5
whisperer, Air Supply reports 140 cfm open flow. I assume they are reporting actual cubic feet per minute with no back pressure on the blower. The flow would be less at the reported 1.4 pressure ratio. I would guess 80% of open flow.
I have heard of a similar design French compressor with more stages and a higher discharge pressure. I do not know the details.
Thanks, Ron
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Post by racket on Oct 27, 2018 16:17:40 GMT -5
Hi Ron
140 CFM ..........10.7 lbs/min .........0.178 lbs/sec , bummer , our bigger engines would soon be struggling for air , but great for an engine with a comp inducer up to ~2" dia.
Now if there was only a blower with ~1 psi pressure build and 1 lb/sec flow , but would need ~5 HP to drive it , mmmm, maybe one of those big brushless "outrunner" motors or a 24V diesel engine starter motor.
Cheers
John
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Post by turboron on Oct 27, 2018 17:14:09 GMT -5
John, what is an "outrunner" ?
I like this starting method. It seems more straight forward than the compressor nut engagement system.
Thanks, Ron
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Post by turboron on Oct 27, 2018 17:38:09 GMT -5
John, a wheeled leaf blower looks promising. G.5 hp gasoline engines and promising blower specs. Many are available on Amazon. $500 and up.
Thanks, Ron
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Post by racket on Oct 27, 2018 17:39:44 GMT -5
Hi Ron
I agree , the airstart method is non contact and much more "natural" way of doing things .
Outrunners are large lower revving brushless motors , the outer part of the motor revolves rather than the armature , they make them up to ~10Kw , though they get expensive at that size , we can probably get away with using starter motors for our short duty cycles
Cheers
John
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