electric to gas direct drive, rotation specific

[snagtooth]

I think I know the answer to this but thought I would ask. Is there a conversion gear drive or something to reverse the rotation of a small engine to direct drive (with lovejoy) a vac blower that was originally powered by an electric motor.Or is the only option to flip the small engine and mount in line for a belt drive system...

 

[Russ Johnson]

I'm thinking that if you spin the blower in the opposite direction, the in and out ports would be reversed.

But there is no gear reversal that I know of.

 

[snagtooth]

Good thought...I dont know if I could spin the shaft around or modify to get enough shaft on the backside for a lovejoy coupler...

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[Russ Johnson]

Most blowers are built to mount on any of the sides or ends. You just need to move the mounting brackets and the vented plug.

 

[snagtooth]

Non traditional setup here...would love to hear opinions on it. I do trade work with a local carwash/gas station and I ended up with two old Hanna CarWash systems central vac units. These powered a 6 hose line each and pulled pretty hard, they lifted water a good 10ft all the way down the line. We upgraded them to a newer set up. So I rebuilt one so far and want to put a 20-25hp gas on it. Trying to build another set-up beside the Sirocco PEV2 that im running. I want some more sucking power!

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[Russ Johnson]

Oh, those are not conventional lobe blowers. Those are built like an electric vacuum with stacked rotors. I doubt you can even spin them at 3600 rpm and you can't reverse the rotation either. You'll most definitely need to belt drive them.

 

[snagtooth]

Yep, I took the rotors all off the shaft and restacked it because some junk was in there and the bearing had gone out causing some rubbing. The electric motors that were on them were 3470rpm, so I figured gas at load would be close.

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[greg/sd]

how about just running them off of your generator that way there would be a lot less fab work.

 

[snagtooth]

I dont remember the exact specs but these are 15hp electric motors, would require a huge generator... trying to get away from the generator actually cause thats what im using now for my PEV2.

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[Russ Johnson]

The electric motors that were on them were 3470rpm, so I figured gas at load would be close.

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Ah, I assumed a 1725 motor.

 

[snagtooth]

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[Russ Johnson]

You could spin it with a 23 hp.

 

[snagtooth]

Thats what I figured too. I want to try either the Kohler EFI or a Honda, never owned either brand in that sizing. Wanted to try something new.

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[Paul Kassander]

You may want to look at the Honda on that the EFI will have issues if you try to pull more horsepower out of it than rated.

 

[snagtooth]

What kind of issues are they prone to having?

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