- Joined
- May 7, 2023
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- 1,388
I'm talkin air compressors, what did you think?
I just discovered this in my "someday box" (Someday that might be useful) and thought Id share and help you save some air.
This is called a set jet and it is an air multiplier, and can output 25X the volume of air than it uses. This looks like it would be a neat shop project for someone who wants blow off, but does not want their compressor running full time. My basement shop air compressor is only 5gal, which is sufficient for most regular work, but if I want blow off for cooling or to direct chips its constantly running, which is annoying as its loud and it gets hot.
This thing is dead simple and I plan on scaling it down, as in this size it takes too much air to work as Id like as the output nozzle is a bit large at 3/8". Essentially in this size its moving a lot of air, but not with enough force to be useful for moving chips unless I really jack up the flow, and that kinda defeats the purpose. Works good on smoke though.
![IMG_3745[1].JPG](https://www.hobby-machinist.com/data/attachments/424/424977-8c6ab11774f8f940ff19f80454bbd670.jpg "IMG_3745[1].JPG")
I have it hooked into a flow regulator for now as that is square bodied and easier to mount to something, but the unit its self, also regulates airflow by turning the output nozzle.
Inside there is an air chamber where the air enters and gets blocked off when the outlet is closed completely. You can see right in front of the air inlet there is a raised ridge surrounding the supplemental air intake. That ring makes the air go down the throat of the outlet and draws in outside air by creating a venturi effect. I tried adding a smaller nozzle to suit my needs, but all this did was make the air blow out of the intake side, so Ill have to make a tiny one.
![IMG_3737[1].JPG](https://www.hobby-machinist.com/data/attachments/424/424978-bdaa0555138ada139931e95a7b8b2c68.jpg "IMG_3737[1].JPG")
The throat of the nozzle is nothing special, just a bit bigger than the direction ring inside the body. Outside is threaded and has an o-ring groove.
![IMG_3742[1].JPG](https://www.hobby-machinist.com/data/attachments/424/424980-32c5455d3f09c62c15f178b8679c889a.jpg "IMG_3742[1].JPG")
Im not sure if this end being dished does any more than smooth out the airflow going in, but here's a pic showing this detail and you can also see the air inlet that leads to the air chamber.
![IMG_3739[1].JPG](https://www.hobby-machinist.com/data/attachments/424/424979-38fca2a80a627ffba6fc7a92b3954552.jpg "IMG_3739[1].JPG")
Pretty cool little device and easy to copy. Might take a bit of tinkering to get it to work well if scaled, but who would mind tinkering?
If you don't want to make one you could buy it, but their a bit pricy.
Vortec corp, these guys have some neat stuff.
Thank you Mr. Bernoulli!
I just discovered this in my "someday box" (Someday that might be useful) and thought Id share and help you save some air.
This is called a set jet and it is an air multiplier, and can output 25X the volume of air than it uses. This looks like it would be a neat shop project for someone who wants blow off, but does not want their compressor running full time. My basement shop air compressor is only 5gal, which is sufficient for most regular work, but if I want blow off for cooling or to direct chips its constantly running, which is annoying as its loud and it gets hot.
This thing is dead simple and I plan on scaling it down, as in this size it takes too much air to work as Id like as the output nozzle is a bit large at 3/8". Essentially in this size its moving a lot of air, but not with enough force to be useful for moving chips unless I really jack up the flow, and that kinda defeats the purpose. Works good on smoke though.
I have it hooked into a flow regulator for now as that is square bodied and easier to mount to something, but the unit its self, also regulates airflow by turning the output nozzle.
Inside there is an air chamber where the air enters and gets blocked off when the outlet is closed completely. You can see right in front of the air inlet there is a raised ridge surrounding the supplemental air intake. That ring makes the air go down the throat of the outlet and draws in outside air by creating a venturi effect. I tried adding a smaller nozzle to suit my needs, but all this did was make the air blow out of the intake side, so Ill have to make a tiny one.
The throat of the nozzle is nothing special, just a bit bigger than the direction ring inside the body. Outside is threaded and has an o-ring groove.
Im not sure if this end being dished does any more than smooth out the airflow going in, but here's a pic showing this detail and you can also see the air inlet that leads to the air chamber.
Pretty cool little device and easy to copy. Might take a bit of tinkering to get it to work well if scaled, but who would mind tinkering?
If you don't want to make one you could buy it, but their a bit pricy.
Vortec corp, these guys have some neat stuff.
Thank you Mr. Bernoulli!
