Centrifugal Waterpump

So we had a competition in my mechanical engineering school where we had to make a centrifugal waterpump that would have maximal flowrate within 20 seconds, so after looking at multiple different pumps and impellers, i ended up on this model. The model got the second place in the competition with a flowrate of 1760ml/min

Components Needed:

• 9V DC motor
• Gasket / Rubber mat cut into shape
• (4x) M3 x 33mm screws and bolts.
• PLA Basic filament / Recommended to use other filaments with more hydrophobic attributes for a higher flowrate.
• 8mm width plastic tubing for the output/input.
• Small o-ring for the motor's shaft so it will be watertight
• ( Optional ) Small washer to lessen the area of contact with the impeller and base.
• 4x AA-Batteries for powering the pump, will work for a few runs well before needing new batteries

Asssembly:

• Take the motor mount, and push it to be on the motor
• Push the motor into the bottom of the main casing, making sure the mount goes in snugly
• Insert your impeller onto the motor shaft
• Apply your choice of sealant onto the sides of the base before placing down the top
• Screw all four screws with bolts on really tightly ( But not too much since it will bend the plastic and make it not watertight )

Functionality:

• If you choose to use better materials and good lubricants for the impellers base, you can get a noticeable boost in flowrate, and this sized pump is really easy to use for any smaller gaps / places to pull water out of.
• Good for small competitions and to learn the functionality of a centrifugal waterpump!