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guandi · 02-15-2004, 04:07 PM

just another reason why i dont think anyone puts any thought into designing pumps these days. sure its got a powerfull, magnetic driven, microprocessor controled motor, and it got 200ft head and does 30 gazillion gallons a second, but its still a bad design.

When the water enters the pump, it gets pushed out in all directions by centrifugal force, but there is only one small area where it is allowed to escape. sure its allowing the same amount in/out, but its flawed.

Okay, if you have ever seen the inside of a basic magnetic driven pump you should understand what i mean...

instead of having the ceramic shaft held at each end (makes it move too much imho) have it held at the bottom in the convensional way, and then have it held *behind* the impellar, where it comes out of the motor housing, then on top of that have the impellar as usual, but with a "nose cone" on it, in the middle, about half the height of the impellar itself.

the inlet to the impellar blades should be funnel shaped, but made so that it fits over the nose cone, and has about half the width of the nose cone space each side of the nose cone for water to flow into.

now, four outlets, all merging back into one at equal length from each outlet, they should be slightly shaped so that as the water is flung out and round its gets scooped up by a lip on the edge of the outlet, and then using a curved channel to minimise the loss of centrifugal force, it should be merged in with the other three.

I spent about 6 months in summer 2001 between school and college making this, and the pump i chose to rape was from my dads aquarium. it put out 600l an hour before i modded it, afterwards it was putting out nearly 1000l an hour!

it leaked like a seive and eventually burnt the motor out due to my poor manufacturing skills and the fact i managed to fill it with metal filings at least 3 times.

not only that but the only tools at my disposal were a hand drill, one drill bit, a blunt junior hacksaw and a incredibly empty wallet.

i dont feel that this design would be viable for mass production, and even if it was, would anyone want to trust a unproven design?

02-15-2004, 04:07 PM	#4
guandi Cooling Savant Join Date: Dec 2003 Location: UK Posts: 174	just another reason why i dont think anyone puts any thought into designing pumps these days. sure its got a powerfull, magnetic driven, microprocessor controled motor, and it got 200ft head and does 30 gazillion gallons a second, but its still a bad design. When the water enters the pump, it gets pushed out in all directions by centrifugal force, but there is only one small area where it is allowed to escape. sure its allowing the same amount in/out, but its flawed. Okay, if you have ever seen the inside of a basic magnetic driven pump you should understand what i mean... instead of having the ceramic shaft held at each end (makes it move too much imho) have it held at the bottom in the convensional way, and then have it held behind the impellar, where it comes out of the motor housing, then on top of that have the impellar as usual, but with a "nose cone" on it, in the middle, about half the height of the impellar itself. the inlet to the impellar blades should be funnel shaped, but made so that it fits over the nose cone, and has about half the width of the nose cone space each side of the nose cone for water to flow into. now, four outlets, all merging back into one at equal length from each outlet, they should be slightly shaped so that as the water is flung out and round its gets scooped up by a lip on the edge of the outlet, and then using a curved channel to minimise the loss of centrifugal force, it should be merged in with the other three. I spent about 6 months in summer 2001 between school and college making this, and the pump i chose to rape was from my dads aquarium. it put out 600l an hour before i modded it, afterwards it was putting out nearly 1000l an hour! it leaked like a seive and eventually burnt the motor out due to my poor manufacturing skills and the fact i managed to fill it with metal filings at least 3 times. not only that but the only tools at my disposal were a hand drill, one drill bit, a blunt junior hacksaw and a incredibly empty wallet. i dont feel that this design would be viable for mass production, and even if it was, would anyone want to trust a unproven design? __________________ A8N-SLI Deluxe FX55@3ghz 2x TwinX1024-3200XL 2x BFG6800Ultra Audigy2 ZS + Gigaworks S750 2x120gb/4x80gb lots of water/copper/pumpy goodness.