Centrifugal Water Pump

Update 1:

Tightened the tolerance around the motor shaft.

Added the files for a 920KV motor. Tested, working.

• Running the 920kv variant works on a 3s battery but works better on a 4s. The 920kv version has more torque and doesn't stall as easily.
• There's still a little leakage past the motor shaft but this can be fixed without proper rubber seals. It can now build enough pressure to start pushing water out of the cracks between the housing. This can be negated with some silicone between the sections during assembly.
• It can hold prime about 5in (13cm) above the surface without sealing the housing (from my testing). This will vary depending on your printers tolerances and if you sealed the housing.
• There is also a 'break in' period. What I've found to work best is to use a little oil to prevent the rotor melting to the housing, then run it at low rpm until it quiets down. Afterwards, slowly increase the speed and add water.
• I have been using some automotive tubing (not exactly sure of the size, whatever fits) and zip ties to hold the tube to the pump.

Original Upload:

It leaks a bit between the motor shaft.

Makes a decent amount of pressure as is but could be improved.

I'm using a 2280KV motor I had lying around. I plan on making a mount for a 900KV.

Tested, Works fairly well. I haven't attached tubing yet. As is it sprays water a solid 10ft.

Print Settings

Printer:

Custom Cartesian

Rafts: 

No

Supports:

Yes

Resolution: 

0.1mm

Infill:

100

Filament:

MatterHackers PLA

Notes:

Print the Body and Stator fairly slow to help hold tolerances. Supports touching build plate on the Body and Cap. The rest no supports needed. Print on glass for best seal. Some break-in is required. I simply used some 3 in 1 oil and ran it at low RPMs until it got quiet. Then slowly ramped up the speed.

Category: DIY