Picture of How to make a Radial Piston Water Pump



For a project ("Hydro do that?") at the Glasgow School of Art, our group of students was tasked with designing and manufacturing a water pump. The task was to be a competition betwixt several teams, each taking the name of an aquatic creature. Our designated company was 'Dolphin'. The winners of the competition were to be the group whose pump had the highest efficiency, and the pumps had to be able to pump five liters of water, through a height of 60cm (2 feet) in less that five minutes.

Our research and development led us to find that a piston pump would be the most effective way of pumping water.

We made three pump prototypes, to see which would be most effective at pumping water.
We built an axial impeller, a diaphragm pump and a piston pump.

The piston pump seemed to be the most viable solution to the efficiency problem, and our online research agreed with this, so we decided to build our final design in the form of a piston pump.

However, our brief required that we do testing and optimization for the pump, so we designed our pump to have three removable and interchangeable cylinders, to allow us to test the efficiency for different numbers of cylinders.

Materials Used:

2mm aluminium sheet
12mm plywood
3mm acrylic sheet
4mm mild steel rod
4x12x4mm bearings
24V, 5600 RPM electric motor
Clear plastic pipe (unknown origin)
Aluminium Bar
PVC pipe T-Joints
PVC plumbing pipe
Evian bottle necks and caps
Assorted screws, bolts, washers
hot glue
pipe cement
Plastic Weld (Dichloromethane

Reccomended Equipment:

Band saw (metal)
Band saw (wood)
Metal File
Sandpaper (various grit)
Metalwork Lathe
Pillar Drill
Cordless Drill
Assorted drill bits (including forstner / flat bits)
hot glue gun

Yeah, we used a lot of stuff on this project. The art school has a very well equipped workshop. One could probably substitute our pistons for something a bit more accessible, perhaps plastic and a standardized pipe size in order to make the whole task a bit less demanding in terms of equipment.

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jfuredy11 months ago

So, how did your pump perform in the competition? What kind of pumps did the other teams build? Was one type of pump noticably more efficient than the others?

TeamDolphin (author)  jfuredy10 months ago

Other pumps in the competition were rope, diaphragm, a single piston, as opposed to our triple radial. Another one I can't remember the name of.. The highest efficiency was about 12% for the rope pump which although incredibly low, is the record for efficiency on this pump project at the Art school, ours only got around 7% I think, but was one of the highest efficiencies out of all of the other pumps excluding the rope.

TeamDolphin (author)  TeamDolphin10 months ago

Although our pump did not win based on efficiency, our team was awarded with a prize for the most ingenious and impressive pump!

Menirz10 months ago

What was the reasoning to keep the output piping as three separate tubes? It would seem like you would get a more consistent flow if they merged into one.

codongolev11 months ago

does it have a fairly consistent output? it seems like it would, because one piston always seems to be compressing at any given moment.

totokan11 months ago

What type of o-rings did you use? Where did you source them from?

eggmcmffn totokan11 months ago

I would look at

Rapturee11 months ago

..Nice! :{)

good job :)