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Step 6Make A Tesla Pump Disc Pack
The Tesla Pump is a disc-based pump invented by Nikola Tesla In the early 1900's. It is based on the principle of adhesion of fluids on a rotating surface can impart momentum and pressure to the fluid.
The 8 discs in this case are CD discs. They are spaced 1/32 inch apart with thin neodymium magnets. There are heavy magnets attached to the disc pack to provide the magnetic coupling with the motor flywheel.
I use Crazy glue to attach the magnets. It helps to scratch up the surfaces of the CD discs and the magnets with sandpaper to increase adhesion of the glue. I also use Marine GOOP around the larger magnets for additional support.
Glue the first 6 magnets equidistant from each other, and about 1/4 inch from the rim. The following magnets will line up automatically by placing discs and magnets on top of the previous ones, and gluing them in place.
Although the disc pack is usually self-centering when running, a suction cup and stub shaft helps keep the disc pack stuck to the bottom. I used some plastic oil-drain washers as thrust washers, and a small length of CD spindle shaft, attached with hot glue to a suction cup, to act as a steadying centre spindle. The other CD discs get crazy-glued to this basic bottom piece.
There is room for experimentation in regards to this driven disc pack, and the best simple way to keep it on the bottom when running.
The 8 discs in this case are CD discs. They are spaced 1/32 inch apart with thin neodymium magnets. There are heavy magnets attached to the disc pack to provide the magnetic coupling with the motor flywheel.
I use Crazy glue to attach the magnets. It helps to scratch up the surfaces of the CD discs and the magnets with sandpaper to increase adhesion of the glue. I also use Marine GOOP around the larger magnets for additional support.
Glue the first 6 magnets equidistant from each other, and about 1/4 inch from the rim. The following magnets will line up automatically by placing discs and magnets on top of the previous ones, and gluing them in place.
Although the disc pack is usually self-centering when running, a suction cup and stub shaft helps keep the disc pack stuck to the bottom. I used some plastic oil-drain washers as thrust washers, and a small length of CD spindle shaft, attached with hot glue to a suction cup, to act as a steadying centre spindle. The other CD discs get crazy-glued to this basic bottom piece.
There is room for experimentation in regards to this driven disc pack, and the best simple way to keep it on the bottom when running.
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