The upper end of the cylindrical shaft is fixed with a peg for installation into the bearing. Archimedean Screw Pumps Since the late 1970s more than 1,200 Archimedean Water Screw Pumps supplied by WAMGROUP ranging from 0.5 to 4 metres in diameter have been successfully operating. Rotor: Double or triple fins are welded to the cylindrical shaft. Getting a perfectly smooth surface on the screw is impossible without serious finishing work and all those imperfections are places for bacteria to set up residency, and while I'm all for kids playing in dirt to keep their immune systems in shape, unwashable things in their mouth just don't seem like a good choice. The Archimedean screw pumps consist of a screw rotor, inclined 30°- 38° to the horizontal plane, which is mounted in an upper and a lower bearing and of a semi-cylindrical trough. A so called Archimedes’ (or Archimedean) screw pump consists of a long worm wheel that is diagonally placed in a pipe or trough, and creates upward displacement of water when driven. I printed in PLA, so when my kids wanted to use it in baths or to pump drinks (7 year old get weird ideas their dads don't always plan for) I had to say no (PLA doesn't like dishwashers or hot soapy water much) but if printed in Purement filament that could change. Screw pumps are utilized to draining low laying areas, such as the polders of Northwest Europe. ABS is probably going to require serious attention to keep from making a mess. When printing the screw on an FDM printer, watch out for curling. I have also provided screw holes in both the screw and handle to allow it to be a temporary build or in case you'd like to use them elsewhere. The Archimedes Screw is a positive displacement pump, which takes fluid from a source and forces it to another location, where it is discharged. One long piece of filament to go the length of the screw as a central shaft is all that is required.
Print out 1 of each (except the "archimedes.stl" file which is only provided to demonstrate assembly) and one extra washer (the washers are optional but they do help keep things in the case).
They are superbly reliable and highly efficient and are capable of moving large quantities of water even when it contains large amount of solids and debris that would otherwise seriously damage centrifugal pumps. Simple Science Fair project/Toy for kids illustrating the oldest know water pump mechanism! Archimedean screw pumps are used in many applications, primarily in the water treatment and drainage industries. Purement Anti Microbial Filament Competition