Ultimate Inline Pump

Seyeklopz · 07-05-2003, 06:14 PM

Has anyone seen a water pump like this? The pump's prop is magnetically held in place directly in the water line, there is no friction other than between the water and the prop.

I'm trying to find one for sale on the net and not having much luck, maybe someone can figure out how to build one? Or a simplified version with bearings.

I saw something like it on tv once.. Wouldn't it be the ultimate pump?

bigben2k · 07-05-2003, 06:27 PM

Funny, I was talking about that design recently.

I was thinking more about a shaft driven propeller though. The way I saw it working, is that the prop would have a hub, and would sit inside a grooved out tube. Teflon would form that groove.

But what I can't get over, is the cam box required, to insert the rotating shaft in the tubing. Maybe this magnetic drive has potential, but what exactly holds it in place, when the pump's turned off? A simple crosshair?

Now I've already got 2 Johnson pumps, and a Little Giant 2-MDQ-SC, so I really don't need another pump, especially not a home made one, but it's still interesting.

I have no idea where you'd get one.

Seyeklopz · 07-05-2003, 06:35 PM

It is held by passive magnetic rings at either end. Stronger ring at the end where water is sucked in, because that's the way the prop will try to go when powered up. You'd have to push it pretty hard to get it out of place. But it might be safer for the system put the prop in a housing and connect tubes to inlet/outlets. The main goal is to pump water with little friction, so less powerful motor is needed. Less noise. The paddlewheel and piston pumps are too loud.

If you had neodynium mags in there it'd never come out of place

Put a 10 pound force mag it it.. Just be sure to shield it from pc components.

Seyeklopz · 07-05-2003, 06:42 PM

I was thinking about a hydraulic pump too. Just like the ones used in heavy machinery, but smaller and plastic. Basically it's a pair of gears meshing together pulling water around the edge of the gears from the side where the teeth move apart to the side where they come together. I'd like to try building one. Remember, electric motors work underwater

No need to seal driveshafts going through pump housings.

well, it depends on motor type.. you need the kind with the wire coil on the stationary part, mags on the shaft.

Seyeklopz · 07-05-2003, 07:06 PM

The great thing about this mag drive pump is you can slide it along the pipe to wherever you want and the prop follows

Boli · 07-05-2003, 10:08 PM

So you could have this as a "booster pump" just before the water block?... sweet.

sevisehda · 07-06-2003, 07:11 PM

Quote:

Originally posted by Boli
So you could have this as a "booster pump" just before the water block?... sweet.

Pump placement doesn't matter in the overall flow of a system. Flow through each part of a series loop is identicle.

The only time a booster pump could boost flow at a specific point would be in a parallel system. In a 2 branch system some people place valaves to equailize flow. I dislike this practice because it decreases flow through the whole system. Instead of restricting the unrestrictive branch one could boost the restrictive branch. This would actually boost the flow not only in the restrictive branch but through the whole system.

Although I don't see a reason one would need this 'inline-screw' pump to do it. You could easily use a very small pump like a 60-75 GPH one.

Seyeklopz · 07-07-2003, 03:10 AM

I like being able to move the pump simply because it allows minor layout changes in the case without having to redo tubing. Moving the pump to add an additional HDD, PCI card, CC light, etc... If you have a full height server case, I guess it wouln't be much use.

The screw pump is a good way to reduce noise in my opinion. I've never heard a piston or paddle/centrifuge pump that was quiet enough.

Some people have suggested putting foam in the reservoir to mask the sound from the submersible type pumps, does that work?

airspirit · 07-07-2003, 10:31 AM

This seems like it would be an outstanding design. Having worked with many different types of pumps in the past (US Navy), this is one I've never encountered before. I imagine that something like this would be extremely efficient and very quiet. I'd love to fool around with one of these.

It's like ship screws, but self contained. Brilliant!

07-05-2003, 06:14 PM	#1
Seyeklopz Cooling Neophyte Join Date: Jun 2003 Location: Saint John, New Brunswick, Canada Posts: 94	Ultimate Inline Pump Has anyone seen a water pump like this? The pump's prop is magnetically held in place directly in the water line, there is no friction other than between the water and the prop. I'm trying to find one for sale on the net and not having much luck, maybe someone can figure out how to build one? Or a simplified version with bearings. I saw something like it on tv once.. Wouldn't it be the ultimate pump?

07-05-2003, 06:27 PM	#2
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	Funny, I was talking about that design recently. I was thinking more about a shaft driven propeller though. The way I saw it working, is that the prop would have a hub, and would sit inside a grooved out tube. Teflon would form that groove. But what I can't get over, is the cam box required, to insert the rotating shaft in the tubing. Maybe this magnetic drive has potential, but what exactly holds it in place, when the pump's turned off? A simple crosshair? Now I've already got 2 Johnson pumps, and a Little Giant 2-MDQ-SC, so I really don't need another pump, especially not a home made one, but it's still interesting. I have no idea where you'd get one. __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

07-07-2003, 10:31 AM	#9
airspirit Been /.'d... have you? Join Date: Jul 2002 Location: Moscow, ID Posts: 1,986	This seems like it would be an outstanding design. Having worked with many different types of pumps in the past (US Navy), this is one I've never encountered before. I imagine that something like this would be extremely efficient and very quiet. I'd love to fool around with one of these. It's like ship screws, but self contained. Brilliant! __________________ #!/bin/sh {who;} {last;} {pause;} {grep;} {touch;} {unzip;} mount /dev/girl -t {wet;} {fsck;} {fsck;} {fsck;} {fsck;} echo yes yes yes {yes;} umount {/dev/girl;zip;} rm -rf {wet.spot;} {sleep;} finger: permission denied

07-05-2003, 06:35 PM	#3
Seyeklopz Cooling Neophyte Join Date: Jun 2003 Location: Saint John, New Brunswick, Canada Posts: 94	It is held by passive magnetic rings at either end. Stronger ring at the end where water is sucked in, because that's the way the prop will try to go when powered up. You'd have to push it pretty hard to get it out of place. But it might be safer for the system put the prop in a housing and connect tubes to inlet/outlets. The main goal is to pump water with little friction, so less powerful motor is needed. Less noise. The paddlewheel and piston pumps are too loud. If you had neodynium mags in there it'd never come out of place Put a 10 pound force mag it it.. Just be sure to shield it from pc components.

07-05-2003, 06:42 PM	#4
Seyeklopz Cooling Neophyte Join Date: Jun 2003 Location: Saint John, New Brunswick, Canada Posts: 94	I was thinking about a hydraulic pump too. Just like the ones used in heavy machinery, but smaller and plastic. Basically it's a pair of gears meshing together pulling water around the edge of the gears from the side where the teeth move apart to the side where they come together. I'd like to try building one. Remember, electric motors work underwater No need to seal driveshafts going through pump housings. well, it depends on motor type.. you need the kind with the wire coil on the stationary part, mags on the shaft.

07-05-2003, 07:06 PM	#5
Seyeklopz Cooling Neophyte Join Date: Jun 2003 Location: Saint John, New Brunswick, Canada Posts: 94	The great thing about this mag drive pump is you can slide it along the pipe to wherever you want and the prop follows

07-05-2003, 10:08 PM	#6
Boli Cooling Savant Join Date: Apr 2003 Location: Blackburn / Dundee Posts: 451	So you could have this as a "booster pump" just before the water block?... sweet.

07-07-2003, 03:10 AM	#8
Seyeklopz Cooling Neophyte Join Date: Jun 2003 Location: Saint John, New Brunswick, Canada Posts: 94	I like being able to move the pump simply because it allows minor layout changes in the case without having to redo tubing. Moving the pump to add an additional HDD, PCI card, CC light, etc... If you have a full height server case, I guess it wouln't be much use. The screw pump is a good way to reduce noise in my opinion. I've never heard a piston or paddle/centrifuge pump that was quiet enough. Some people have suggested putting foam in the reservoir to mask the sound from the submersible type pumps, does that work?

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