Screw Pump Redesign Project.

an approximation, find the cross section area between the flites (along the axis of the screw). multiple that by the RPMs, this will give you an approx. not included loss due to back-pressure and inefficiencies.

I did something similar, for an extruder and also cooker for the cheese industries, plus I had to find the pressure, which is another operational calculation.

Phoenix,

Good answer, but I think it would be easier to caculate the volume of the cylinder and subtract the thickness of the flites, and shaft.

You think???

,

mine was just a square.

Cheers

Thought it was more complicated

I have allredy worked it out 756Rev/min to get 10Kg/s. Right now to start on the redesign

Ill post as I go along and get some ideas

Cheers again

Just a quick thought though!!

I will probably need the pressure within the pump as it turns as I need to specify the materials the pump is made from. Guess Mr. Bernoulli is rearing his head again

To get the pressure, this stumped me to figure that out, it's complicated and I hope you saw my post stating OPERATIONAL PROCEDURE.

I do not know if you could do it, its kind of reverse engineering. I'll email you how I did it, But one thing is. I had an operational proto-type unit, but because of the config, I could not get a pressure gauge on it. And I do not believe this will help you to get a result prior to fabrication. , but maybe on another project.

ok.

phoenix911

another thought, before my editing expires. pull info off the existing pump, flow and pressure, and compare that to the screw design, this may help. it may be just ratios, but it should give approx. numbers?

reverse engineering.

Thanks Phoenix

I'm not being pedantic...just curious.. (honest)

Is it 'flites' or do you mean flutes? Or is there some special word for them thingies?

Del

I guess it would be a flute as only one I just call it the helix

Hi Del,

Them thingies are called "flights" by one of the bigger Archimedes screw pump manufacturers. (Spaans Babcock).

Just test your mud auger using an oriface plate and kick it out the door.

I am at a loss to as why anyone would want to build let alone use a screw pump for pumping water. They are the most inefficient way of moving water it is possible to find, a bucket and string would be preferable. A small submersible centrifugal pump would move a lot more water for a fraction of the cost.

It is a design project for uni so To be honest it will only ever make it to the 1/2 scale rapid prototype model stage. Its more the design stages and inovation they are looking for

I'm at the same uni in the same year doing the same project, stop getting other people to do your work for you and do it yourself like the rest of us, even that drawing and those calculations you claim to have come up with were what we were provided with in class to work from. Idiot.