Electronics > Beginners
Need a small vacuum to suck liquid into a reservoir
engineheat:
Hi,
We have a machine where a small nest get slowly filled with oil, due to certain process. The nest is roughly 6mm in diameter and 6mm deep. When the oil/grease inside gets too much inside (say, 3mm deep) it causes issues. There are many such nest so cleaning is a time consuming task. They move in a conveyor-like belt.
I want to try to build a station where a vacuum can create a suction to suck the excessive oil from the nests into a reservoir, via some kind of tubing. The suction tip cannot reach inside the nest, it can only hover above, because the nests moves in a conveyor like cycle.
I don't know what options there are. The suction needs to be strong enough. I can build the reservoir and provide the tubing myself. Ideally we can power it using 24V.
What are those things that dentists use to suck the liquid out of patient's mouth when doing dental work?
Thanks
JustMeHere:
Maybe blow the oil into a container.
DTJ:
Grab one of the small sparkfun pumps.
https://www.sparkfun.com/products/10398
Use small ID tubing and have a catch can between the oil wells and the vac pump.
If this does not provide sufficient flow/lift then use your workshop vacuum cleaner as the vac source.
Tom45:
I would be sceptical that a vacuum could suck much, if any, oil without extending into the hole. You do an experiment to see by drilling a hole in a piece of metal and then see if a shop vacuum with a micro vacuum attachment kit would suck out any oil when held above the hole.
The suggestion to blow the oil out of the hole should work, but doing it in a way that doesn't create a big mess might take some thinking.
tautech:
If this is in an industrial setting you might have plenty of compressed air available to use a venturi suction setup.
Any mechanical engineer could make one for you.
You might have to experiment with nozzle sizes and air pressures in the venturi fitting and hose/nozzles sizes for the suction pickup.
If compressed air is available this could be the simplest solution as a venturi has zero moving parts.
Squillions of them on Aliexpress to give you an idea of what's available:
https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20191226233250&SearchText=venturi+
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