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Pump Designer on Drugs

Darryl

Registered
Opened up an inch and a half pump my Dad picked up at a clearing sale 50 years ago and found the stupidest impeller ive ever seen.
No wonder they didn't put there name on it anywhere.
Cast iron housing, brass nuts all over and a brass impeller.
Anyone know anything about it ?
 

E27N

Subscriber
Last Subscription Date
01/06/2020
Re: Pump designer on drugs

It’s actually a manifold.... It just identifies as an impeller...... :O
 

Craig Gillingham

Registered
Last Subscription Date
12/04/2017
Re: Pump designer on drugs

Seeing those round impellors in profile explains a lot. Mostly, how would they ever be effective?
 

Scotty 2

Registered
Re: Pump designer on drugs

Crikey. Certainly unusual. There's definitely some outside the box thinking happening there. Very innovative.
Can you take a picture of the other side Darryl? Something about it seems familiar to me.
Oh you gotta fix it up and get it pumping. Everyone will be curious just how well it will pump.

Cheers Scott
 

rodneyt

Registered
Re: Pump designer on drugs

fascinating
what forces are happening to the fluids when operating ?

maybe the thought was to obtain the maximum pressure by having the fluid exit the impellor as near to the maximum radius from centre as possible,
this might theoretically make it more efficient?
or if not efficient,
maybe maximum pressure for minimum revs, note the large pulley?

another possibility is an attempt to make a 'no prime' pump.
i can imagine this design might actually pump air, and so create small vacuum?

as already said, now you gotta fix it and find out what it does!

on first sight it actually looks more like a rotary motor...

thanks Rod.
 

Darryl

Registered
Re: Pump designer on drugs

The designer didn't know about cavitation, drag and hasn't looked at anyone else's impeller design in my opinion.
I just keep thinking , WHY ?
 

AussieIron

Subscriber
Last Subscription Date
02/04/2020
Re: Pump designer on drugs

Well they sold at least one, so you would guess it must've worked.
 

Inter Bloke

Registered
Re: Pump designer on drugs

From the look of your photos it "looks" like the "arms" of the impeller are sealed front and rear making a "tube", any liquid that made its way into the center and was forced out the end should be traveling at the fastest possible speed, so my "guess" is its someone's idea of how to build a high pressure low volume centrifugal pump, maybe an early firefighting design. I think looking at it there were better ways to go but designers have tried and modified things as long as there have been designers !

Interesting old pump even if we don't know its actual use !
 

Darryl

Registered
Re: Pump designer on drugs

It was a very early cow shed washdown pump so it was a pressure pump but was fed from an overhead tank so was flood primed . I know this because Dad told me when i was a kid, and the cow shed is still there, where he bought it from ,with a modern cow shed built next to it but the tank is still there.
The pump was never used by Dad.
 

Inter Bloke

Registered
Re: Pump designer on drugs

It was a very early cow shed washdown pump so it was a pressure pump but was fed from an overhead tank so was flood primed .
That all fits quite nicely !
I hope you do something with it and a couple of those photos on a "brag board" at a show would be quite interesting, I haven't ever seen anything like it and I have seen a lot of pumps !
 

Oil Power

Registered
Re: Pump designer on drugs

Hydraulic "engines" or motors were in use at one stage. This looks more like an hydraulic motor than a pump. Could it be that it was fed by the overhead tank and drove a separator? I know John Abraham of Ballarat made some hydraulic engines to drive small dynamos.
Hugh
 

rodneyt

Registered
Re: Pump designer on drugs

while it looks a bit like a motor design to me,
2 reasons i believe it is not actually a motor, even though it probably would work as one,

firstly it comes with known history, oral history, in spite of oz storytelling practise, still a first class starting point,

second, if it was intended to be a motor, the obvious effort which has gone in to the design shows some thought and hopefully (hopeful?) logic, which tells me the designer should have known enough to think to put the impellor (expellor) outlet slots on the 'trailing' side of the tubes, not the sides, to help add 'radial side push' turning force as water is forced through.
unless of course the side v-slots were added by the user as an aftermarket improvement.

if i had designed this pump, i would have made the ends with 45 degree cut, open towards the direction of travel, to help the rotor 'push' the water along more, and conversely, if i had wanted it to be motor, i would have put 45 degree cuts facing 'backwards' so the water pressure pushed the rotor.

are you sure it hasn't got a means of turning the rotor pipes around so the slots can face different directions depending on what you want to use it for????

when you get it going, its gunna need a few pressure gauges on the pipes to show us what it can do, as well a couple different types of fire hose nozzles.

does our insurance cover damage to smartphones caused by water escaping the display compound fencing?

cheers Rod.
 

Scotty 2

Registered
Re: Pump designer on drugs

when you get it going, its gunna need a few pressure gauges on the pipes to show us what it can do, as well a couple different types of fire hose nozzles..
I found a really nice old brass vacuum/pressure gauge a fair while ago. Every time I look at it on the dash of the old Pajero I keep saying to myself I have to do something with that. I've been meaning to mount it on the sucking side of one of the old pumps just for fun. A pressure gauge on the outlet.....vacuum on the sucker. I've always curious about things such as how much extra suck a pump can create.

Cheers Scott
 

Darryl

Registered
Re: Pump designer on drugs

The v slots are worn into the tubes from rubbing on the faceplate.
I think hydraulic motors are fed from the outer side of the " impeller" to exert the main energy onto the biggest diameter and then be expelled through the center. It might work with pressure from the center but i dont think so.
 
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