In my efforts to build an electric HERMS system
I decided to attempt to build my own pumps
. I was really intrigued by peristaltic pumps due to their ability to work in reverse, self prime, meter (dose), and ease of cleaning/sanitizing. I didn't want to post anything on my pump design until I had a successful trial run of the first build... that time has come so here goes:
The base design is a 360° eccentric peristaltic that uses a single roller to move the fluid in either direction by squeezing a silicone tube.
The major components of the pump head are:
1. 9" round spring-form cake pan
2. Long-board skateboard wheel and bearings
3. 160mm mountain bike brake discs
3. Bolts, nuts, and washers from McMaster
I built the design in 3D first to provide an initial validation that this thing might stand some sort of chance of actually working.
The skateboard wheel is mounted to a hub created by bolting together a couple of standard mountain bike brake discs.
The wheel rotates and squeezes the tubing causing the fluid to be pumped. The distances of the wheel from the outer wall can be changed due to the slots cut in the brake discs.
The back is ready to have a motor (going down the path of a large computer controlled stepper) mounted to it.
Should end up looking something like this with additional mounting hardware:
Ran the pump tonight using my cordless drill as a temporary motor and it worked really well. Moved roughly half a standard ale pale worth of water to a second pale in around a minute, and then transferred it all back to the original. My system design calls for two of these pumps so once I hash out all the small details I will build a second one.