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hiuwo

Mountable peristaltic gear pump, comes with allen key

by hiuwo Jul 30, 2016
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It doesn´t work.
the pump has disintegrated into their five parts.
This is waste of PLA.

Won't this all stick together during printing? Does anyone have the files with the parts separated?

No sorry, this one is designed to be printed out as one whole unit.
With a properly calibrated 3D printer, and the right tolerance settings, (also most importantly set to no support). It should just jiggle its way loose.

Printed successfully :)

Seems a bit rough / stiff though. Would you recommend oil or just running it for a while to wear down any rough spots?

Nice! In my experience just turning it will wear it down best. If it is realllllly stiff the next time you might have to turn up the tolerance if your program allows you to

A little bit of running it for a while with a motor and then a bit of oil and it's running lovely. I tried OD 4mm ID 2mm and it's way too thick. The pump just freezes up.

Can you tell us what size of a tube in the metric system? PLEASE...

The largest I tried was ID .081 OD .147 so that is ID ~2mm and OD ~3.73mm

nice design, but can you tell me how to put the tube inside?
i have a 4/6mm silicon tube, is this to thick?
what tube are you using?
thanks

The largest I tried was ID .081 OD .147 so that is ID ~2mm and OD ~3.73mm

To put the tube in, I thread the tube into one hole and out of the other hole, then as I turn the gear, I push and line the tube into the gap.

i think the largest I tried was ID .081 OD .147 inch tubes. Smaller tubes should be fine too, and might be easier for the gears to turn.

What size tubing is used?

i think the largest I tried was ID .081 OD .147 inch tubes. Smaller tubes should be fine too, and might be easier for the gears to turn.

Any chance you'd be willing to upload the .scad (assuming you did the modifications with OpenSCAD) file with your mount modifications?

I actually modified the files with TinkerCad and they only let you have STL OBJ.

Huge advantage of this type of pump is self-prime characteristics. This will even self-prime when located above the fluid being pumped.This type of pump is common in the medical industry as the fluid remains inside a sterile environment (tubing) and does not contact any impellers, housings, lubricants etc.

Printed on Wanhao Prusa i3 and could turn all the way around straight away. Just not smooth in two places, caused by some extra plastic on the layers closest to the bed (probably just from the bed not being perfectly level). Trimmed that off and works perfectly now!

This may be fun to play with. I just had the thought of ganging two together... or more if you had the need. I was thinking ganging two together to see if it could meter and pump things like two part epoxy resin? could it be a useful to meter out two equal parts like a dispenser? Maybe a redesign with bolt holes to make them stack and bolt together. Maybe standard 1/4 inch screwdriver bits could be used as keys between the gears so they drive together? ... think im going to need to print this and play around

I suggest bolting them on a surface along with other electrical works so you could put multiple of them side by side and turn them with one key. But I could rethink and try putting in a stack mechanism...

This looks cool. May I ask what you use printed parastaltic pumps for? I'm thinking of making a drinkbot and may use these for the fliud transfer.

I could fit a motor and feed my hamsters sucrose as a reward and train it to learn tricks!

the are positive displacement pumps that move a constant volume per cycle. The limit to volumetric flow rate is the revolutions per minute. They do have low flow rates for comparable power input of other impeller type pumps and they are prone to wear out more quickly, given the pressures and frictional forces. Ideal use is to pump liquids to hire elevations and flow rate is not a factor.