I don't know too much about pumps but maybe I can help you with your Internet search.

Use the words "submersible", "well" or "down hole" in your search engine.

There are two companies in my area that make these types of pumps. One is called Centrilift, and I can't remember the name of the other. The other company did supply some pumps to the US Army Corps of Engineers to pump out the floodwater from New Orleans after Hurricane Katrina. You might try searching for news stories about this to find the name of that other outfit. That happened back in September of 2005.

You might also look at oilfield drilling technology. I belive oil well drilling uses some of the same principles as screw pumps.

I also remember seeing a Challenge Question about water well pumps that was posted a while back. You can find it here:

http://cr4.globalspec.com/blogentry/41/Pump-Problems-Newsletter-Challenge-12-13-05

Hope this helps!

Have you considered a "jet pump" where a standard high pressure pump
pumps water into the water outlet pipe to create the pressure difference
to lift the water the required height.

Don Yates
columbusgroup@iinet.net.au

Screw pumps are positive displacement pumps and are used to pump viscous as well as slurry type of fluids.

For pumping of the water from the 30 mtr. you can either use submersible pumps or jet pumps which comes in the category of centrifugal pumps, which can pump fluid having negative suction head.

You can search for submersible pumps, open well submersible pumps, or jet pumps in the website.

Screw pumps are positive displacement pumps and are used to pump viscous as well as slurry type of fluids.

For pumping of the water from the 30 mtr. you can either use submersible pumps or jet pumps which comes in the category of centrifugal pumps, which can pump fluid having negative suction head.

You can search for submersible pumps, open well submersible pumps, or jet pumps in the website.

Hardik Gandhi

hgandhi_in@yahoo.com

You can contact me on this mail ID.

hi,

Do you want to design a screw pump or need to prepare a specification to buy one. Also why dod you need a screw pump to pump out water, screw pumps are normally used for very high density slurry in paper industry , waste system etc..

S.Das

At first I wanted to just give the specifications for the pump. However, I haven't been able to find any screw pump similar to what I need. All of them have their inlets and outlets on the sides. What I need is one with an axial flow, with the inlet on one end and the outlet on the other end, where the shaft is connected.

This is to try a new design for the classic american windmill. I have no power source other than the wind. The turbine (fan and gears) can turn the power of the wind in either a continuous rotation or a cyclic linear displacement.

As far as I have studied it:

• An axial pump won't meet the height requirements.
• Gear pumps and similars must have their inlets and outlets mounted on the sides. There is no way I can action them with the rod of the windmill.
• I can't even imagine a way to use a centrifugal pump in this situation.

If you know of any manufacturer that makes screw pumps like the one I need, please let me know.

Are you talking about an Archimedes screw?

No, an Archimedes screw won't make it. They need to work in inclined planes and don't make it through great heights. The average well in Uruguay has between 30 and 100 metres of depth.

A simple auger type screw flight in a pipe will not work for that high a lift. Either a direct lift piston pump or a centrifugal 'jet' pump are simplest with choice depending on motive power available. The direct lift is a 'piston in bore' moved up and down with 'sucker rod' drive from the top, powered by most any means--from wind to human turning a device that turns the effort into vertical oscillation of the sucker rods/piston. Many thousands have been powered by windmills.

Gussosa,

even if you designed the screw pump, the carrying out would be to expensive, so give up and by one. The data about the design you can find in the nechanical engineering manuals. The screw pumps are the gear pumps where the gears have small number of teeth. You cannot execute the design in an ordinary workshop because for that you need special machining.

Best regards

Marijan Topic

For that aplication you need a sumergible pump or vertical pump

Hola,

Do you need this as an engineering exercise, or do really need to build/buy one? I am asking this because for real operation the choice of auger pump is not the best one. (to say it mildly...) For 30m deep well your best bet is a submersible turbine pump. Depending on your flow rate requirements, you can choose between 1 L/Sec to 1000L/Sec. and over. A line shaft or a jet pump are also good possibilities... What do you really need to do?. If you will let us know you might get the right answer.

Chao,

Wangito.

Yes, this is an engineering exercise for my Theory of Mechanisms course. It also is a consequence of how pissed I got every time I had to fix a water pumping windmill because the pump rod got disconnected. I was going to this study anyway but my professor convinced of using it for the course.

Uruguay is almost fully electrified, but Argentina, Paraguay and Brazil are still good markets for water pumping windmills. I don't know of other Latinamerican markets but I am sure they exist.

I believe many problems can be fixed if I use a rotational system.

• The pump rod (and the supporting structure) won't suffer the stress of the cyclic traction and compression. Fatigue failures are almost unknown, but pumprods loosing the bolts that connect sections are pretty common.
• The water flow will be continuous.
• The possibility of experimenting a water hammer is eliminated. I have never seen it but there are references in literature of it happening if the well goes out of water. Check this.

I think I can even get more radical and use a cable instead of a rod to transmit the torque to the pump! That would easy the assembly as you wouldn't have to stop while you submerge the plumbing to connect sections of pipes and rods. You would connect just the pipes.

If you have a rotating shaft 30 meters long running a screw pump, why do you think it will not be subjected to flexural stresses? If it runs at any reasonable speed, it will most certainly oscillate like a guitar string going 'round in circles . . .

Cool! I would build it just to see that.

I don't think that would happen, as the turbine wouldn't give it any amplitude at the connecting point, but I will check the possibility. Thanks.

Screw Pump will not do the job.however u can refer to krassic 's pump hand book.

Thanks, I am already reading Karassik's handbook.

You need not be ashemed of this question.This design is possible by practical experiance only.You can take submersible pump for your application since the power involved only on delivery of water.Also saving in space.Simply you can provide 1.5 hp single phase supply submersible motor. You will get good dischrge of water in the 1" or 1.5" size delivery pipe.The presant system of education is not producing any qualified plumber in the ITI etc.,

You would use a submersable pump installed in the well, well below the "standing" water level in the well. Here are some tips, based on my residensial well.

1. When the well is drilled, the driller can give you an approximate discharge capacity of the well, as well as the standing level of the water in the well.

2. Your pump is sized by the diameter of the well casing, and having the required number of stages (impellers) to develope the required pressure.

3. Set the pump at least several feet below the standing level of the well so that you will always have a positive pressure on the inlet side of the pump.

4. A pressure tank is used as storage and to maintain system pressure. The pump is controlled from tank pressure.

Let me relate to you my system. My well is 300 feet deep, and the water level stands at about 65 feet below surface and a flow of approximately 50 gpm Which represents the recharge rate of the well. My initial pump was 1 1/2 HP, 12 gpm, 200ft of head, with pump set at 200 ft down the well..This pump had 9 stages to provide the capacity. The controls are set to bring the pump on at 35 psig and off at 60 psig. I have a pressure reducing valve in the line serving my home, which is set to maintain 50 psig line pressure. This provides a very stable flow in the system.

Hope this helps.

g scott

_______________________________________________

When I ponder, I sits and thinks, sometime I just sits.

I thought the original question involved a windmill as prime mover and you wanted to use right angle gearing for a direct drive. Has the question been modified or is this another question. I did not respond to the original question because I did not know any way to do it. A screw pump is adaptable to an incline. I don't think it can be made to work vertical.

youre barking up the wrong tree Amigo...instead of trying to apply a design of pump that wont do the job as well as other types , try redesigning the rod/head attachment area of the vertical piston type pump and beef it up to make it unbreakable , now that would make you some money my friend..dont waste your time and mental energy pursueing the wrong line of attack.stick with the simplest designs they are invariably the longest surviving and best selling because of that simplicity...good luck.

That has already been done. So why not experimenting something new?

Hey, I remember seeing a pump that will work. It was hand driven by turning a crank. It was located in the front yard of an Amish farm in New York State. It had a continuous chain with little rubber balls mounted in line every 6 or 8 inches (or so). There was a sprocket and crank at the top mounted on a horizontal shaft. There was also a sprocket down in the well under the water. The continuous link chain ran over both sprockets.

At the bottom of the well, the balls entered a hollow wooden log capturing the water ahead of it inside the log. As the ball on the chain raised (inside the hollow log) the water ahead of it was raised to the top, (like a conveyor). As it rounded the top sprocket, the water dumped into a trough.

The sprockets were made with notches so the balls and chain would run smoothly around it.

This pump supplied water for all the farm animals.

The wooden log could be replace with PVC pipe. The lower end would need to be funnel shaped to direct the balls to enter the pipe.

Snakers

I would suggest that a "progressive cavity" pump may be suitable for this duty rather than a screw pump. www.monopump.com is one manufacturer.

That link doesn't work. I suppose you are talking about Moyno pumps. Anyway, they haven't got what I need.

hello there:

greetings from india: screw pumps, are positive displacement pumps with a drawback; they cannot suck water like a centrifugal pump or a reciprocating pump(suction limited to 30 feet or so). so, necessarily they have to be below waterlevel.

you have not indicated the quantity of water to be pumped.

screw pump can be coupled to a submersible motor also submerged in water but connected to power source through a submersible cable

the driver, motor, engine or wind power can be above ground level, but the power transmission will be cumbersome, if not impossible.

in the light of above points, can you express your line of thinking?

shankar

I will use it below water level! Suction is not a problem.

The minimum stated, generally, is 3000 litres/hour

Chain pump

From Wikipedia, the free encyclopedia Jump to: navigation, search

The chain pump is a type of water pump where an endless chain has positioned on it a series of circular discs. One end of the chain dips in to the water, and the chain runs through a tube, slightly bigger than the diameter of the discs. As the chain is drawn up the tube, water becomes trapped between the discs and is discharged at the top. Historically, chain pumps were known and used for centuries in the ancient Middle East, Europe, and China.

The chain pump sopunds like a design I would like to try. Already have a sketch in mind. Thanks.

I know one option you can use as a reference. I once sold a small progressive cavity (screw) pump. The supplier was in Cedar Falls Iowa. The application was to empty water from drill holes to prepare for blasting. The pump was driven with hydraulic fluid. Quite compact, able to handle some abrasives.

Hope this may be of help.

Dave Hudson. Canada

30 m long shaft will bend if not supported. I would never use the screw pump in the drilled wells because the sand would distroy it shortly. Use submerged pump. This is the right solution, and exercise the design if you want or must.

Regards

Mrijan

Marijan...

Your not listening, or not reading... The original question submitted states that the prime mover is wind power and electricity is not available.. He is looking for options other than a pump jack, sucker rods and/or a submerged cylinder. A submerged pump is a generic term. What kind of submerged pump are you referring to and how do you know that sand is a problem, He might be in (sand free) rock strata.

Snakers