Completely hollow pumps question

[aismodeler]

Hi all
I am new in pumps, so my question may look completely dumb. I am looking for a hollow pump, the motor has to be hollow too. The pump has to move fluid radially from one hollow tank into another one. The tanks are coaxial.
thanks a lot

 

[MikeHalloran]

If the tanks are coaxial, and you move fluid radially, it must be going to a third tank.



Mike Halloran
Pembroke Pines, FL, USA

 

[bimr]

Perhaps one of the submersible turbine pumps will work:

http://www.flowserve.com/files/Files/Literature/ProductLiterature/Pumps/ps-50-3-ea4.pdf

 

[aismodeler]

Thanks for responses
The hollow coaxial cylinders (tanks) are looped back at the bottom part, bottom is not accessible. The fuild has to be pumped from inner tank to outer. Seems to me that if pump would suck liquid from top part of innner hollow cylinder and push the liquid radially toward the plenum on the top of outer cyclinder I can get very compact system

I need about 10" clearance (hollow part of the pump) all the way through the motor. I am looking for low profile compact pump that would cover top part of the inner hollow cyllinder and top part of the outer hollow cylinder or cover them partially. flow rates I am looking for are ~15cft/sec

thanks a lot

 

[MikeHalloran]

I stand corrected.

You seem to describe a large-ish centrifugal trash pump, mounted with the drive end up, mounted at the top of a cylindrical tank having a cylindrical baffle down its center.

Of course it can't pump anything until the tank is almost completely full.

I fail to see the need for a hollow motor, unless you actually require the ability to drop a cannonball into the water through the rotating impeller. Okay, maybe it's a magical instrument package.

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Every few years someone announces an axial flow pump with the vanes mounted to the inside of a rotating cylinder. I think the latest variation is a river turbine of considerable size. The devices usually disappear quietly, once the inventors hire an actual engineer and get the bad news about bearings and seals.

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Perhaps you are thinking of something like Dyson's magical bladeless fans. Such a thing is possible, sort of, with water. The actual pump is located off to the side somewhere. The part that they call a pump is actually an eductor. In a closed system, the hidden drive pump has to draw liquid from somewhere in the system. We might be able to suggest a location if we new what your apparatus was intended to do.





Mike Halloran
Pembroke Pines, FL, USA

 

[aismodeler]

You are right, I need hollow region to blast "balls" through it into bottom vessel that linked to those two tanks. The fluid we need to pump is hot (600C), corrosive, a bit denser than water.

 

[MikeHalloran]

Oh. For a minute there, I though you were posing a problem that was _hard_.

The blasting requirement actually makes things easier. If you use a trash pump with a super-open impeller, then its axis does not have to align with the central lumen of the tanks, just be sort of parallel to it.

Your 'ball cannon' just has to be synchronized with the impeller so as to fire between the blades. That problem was solved in WW1.

No hollow motor or super large bearings or super large seals required.


Mike Halloran
Pembroke Pines, FL, USA

 

[aismodeler]

Oh yeah, I like it, but "balls" are moving slightly slower that speed of light with micro seconds time interval