Making a Miniature 5 Vane Air Motor
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- เผยแพร่เมื่อ 15 มิ.ย. 2024
- In this video I'm making a 5 vane rotor air (pneumatic) motor. This type of motor is used in a variety of air tools seen every day, nothing uncommon. While this may not be very exciting, I found that this is actually a positive displacement pump. That means, it can be a perfectly working miniature supercharger. This type of supercharging was applied decades ago in actual engines and worked very reliably. In my case though I'll need to change the materials of the vanes and the housing for better sealing and reliability. Any suggestions are welcome :)
My 5-Axis Desktop Milling Machine: pocketnc.com/collections/v2-10
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Even with all the equipment you have today to manufacture these wonders, it is only possible if you have the will and knowledge to operate them, not to mention your brilliant ideas.
Congratulations my friend.
OMFG
remember people to report SPAM comments
No I believe it depends on the size of your wrench.
8:16 you designed your motor the wrong way, the narrowing in the cavity should be at the top not the bottom. Your shaft should be closer to the ports, not further.
Also as springs you can use aluminum from a cola can, because it's springy. You only need enough pressure to hold the vanes against the housing, once there's compressed air a positive pressure forms behind the vanes and pushes them out.
I was thinking the same thing about the narrowing being at the top. Wasn’t sure if I was going crazy
Yeeep it frustrated me too
Yeah, I kinda looked at it funny and double checked, it's backwards... XD
Aluminium as spring will fail due to work hardening, BUT cutting small strips from a measuring tape won't.
@@nixie2462 actually the aluminum in aluminum cans counts as forged hence why it's so springy and can be used as a spring because it has a much higher yeld strength.
@@poptartmcjelly7054 Nixie, is correct: aluminum work hardens very quickly. That's why aluminum cans crack after you bend them a few times.
Who else grinned when the video displayed "Positive displacement pump"?
dude you have the coolest machine shop in the world..
THE SMALLEST PNEUMATIC DIE GRINDER EVER!!!! Nice build.
I wish you uploaded a new video every day. I can never get enough of your content.
We can wish but I think it takes a lot of time to design film and edit
You can use it as an oil pump too. Two mods: 1. you need springs, and i suggest you use spring steel cut and shaped like a V to fit in behind the vanes. 2. The faces of the vanes need to be square to the casing. You can give them the smallest of chamfering, but they really need to be flush with the case when touching.
Source: i copied a car oil pump to make a miniature oil pump for an RC airplane engine. I used ceramic vanes (cut and lapped from a small ceramic blade handle) and a stainless steel casement, with two teflon shims as faces, and clock spring sections bent as springs.
Worked a little too well, so i had to cut a small relief into every second blade to down the pressure a little.
Can't wait to see a rc super charger build
This has easily become my favourite channel. Keep up the amazing work 👍
Your work and detailed attention is a virtue Sir. Salute
The finish from that endmill at @3:00 is amazing. Lighting, reflections just amazing.
chowdered right to shit if you ask me
Is.. is he really teasing us in continuing reaching the supercharged RC car? :O
“2RD prototype”? Would that be somewhere between the 2nd and 3rd?😂
yesn't
2rd = turd
Your projects are always fascinating.
I like how you took the time to show us the plastic flap, very satisfying:)
Congratulations! Awesome work. The pocket Nworking is a must!
Your machining skills are impressive
2:41 That secord prototype looks good 😂
Really like the Pocket NC
Everything Stops when you post a New Vid.
Thanks for Sharing 👍🏻
Yes that’s awesome good job
A motor that works with the air pressure
Looks cool
That was a awesome video thanks
well played johnnyq. well played.
That'd be an awesome water pump. You could put the shaft into a dremel or drill and run an intake hose into some water and have a hose on the output and probably pump some serious water with that little thing. Awesome build!!!!
Good work brother, congratilations
and I love your tools.
Is the rotor offset towards the bottom of the intake and exhaust ports so the air is forced to move faster in turn making higher rpm? my mind is thinking more surface area on the rotor blades will create more torue, but possibly less rpm? would be cool to hear your thoughts.
You are right the rotor is offset I was surprised to see it work it is also the reason why it was stoling and the air was moving freely towards exost and with the presecion he made it , it was lacking power. It's unclear to me why he did it may be it is a another design or he didn't realize till it's too late 😁. Let me hear if he replied to you
was trying to figure this out myself and came to the same thought train as far as compressing the air, but i still feel it would take the path of least resistance which would be over the top, there has to be a good amount of backpressure anyway holding the motor back if it is indeed not going over the top.
I can’t explain it in the comments section. But i saw a video once „how do pumps work“ or „the different types of pumps“
You can wonderfully figure out why the axis is offset then and you can understand that it’s important to be offset.
It’s not just a rotor, it’s a pump.
th-cam.com/video/Qy1iV6EzNHg/w-d-xo.html
At 3:14
I thought it would work better if it was offset towards the top, so the air comes in, travels down around the bottom( which has a larger air space) then up the side and exit the exhaust side.
I love the part when he say « in other way, a supercharger » 😂😂😂
Very cool!!!
OMG i love this channel
I like your videos very much.
I just had to watch this video a couple of times for the Pocket NC.........one day maybe I'll indulge myself and get one.
similar to engine oil pump. great contents bro, keep it up
Rc supercharger sounds fun
Sounds like a dentist's drill.... Shudder. 😳 Great workmanship.
Incredible! 😳
Very cool. 👍
Dang dude how do you come up with these amazing ideas. Great job bro!
Very interesting, never seen a design like that impeller
Basic vane impeller design. You see them in oil pumps (commonly used in cars), some air tools. Nothing special outside the fact that he used plastic and aluminium, usually, they are steel, and the vanes (the little moving squares) are hardened metal.
Saudades desses tipos de vídeo no seu canal.
Like your Videos so much ;) Cant wait for the next one.
Teach me please!!! You’re amazingly talented, like triple Beyoncé talent. 😁
Id love to see a supercharged rc engine!
Excellent video!!! I'm not sure WHICH PART of your videos I love BEST!?!? The actual MAKING of the things,the INSTALLING of the things,or when it's all done and You RUN IT in things!?!? Lol. Always waiting for your NEXT video JohnnyQ90!!! ;-)
This thing would be the coolest supercharger ever
Awesome!
A SUPERCHARGER!!! YESSS!
Yeah, vane type superchargers were a popular thing for many years. If I remember right Jenson was the most popular. Think they only fell from favor because of the unavoidable maintenance issues with the vanes. You'll definitely need bearings on both sides of the case for that kind of load, though.
This is actually exactly how power steering pumps are constructed hence why you can use this design as a positive displacement pump.
Am I stupid, or is the porting wrong?
I'd love to see this turned into some kind of rotary engine, maybe a new, larger one with a metal impeller? I'll bet you could do it
Before you change anything, I recommend doing a pump characterization. All you need is a flow meter, a manometer or other pressure gauge, some sort of adjustable flow restriction (valve), and a way to drive the pump. This will give you the information you need to size one properly for whatever engine you want to attach it to. Basically, if you know how much air your engine pulls at a certain RPM, then you can size your pump to give the desired boost at that flow rate.
Ok, I cant wait to see what you do.
Hey. Love your work and projects.. but i think that rotor offset needs to be just opposite. That way expanding air pushes vane. Its possible doing that now but very short duration ( just that short inlet outlet period.)
That is great ! in order to get more efficiency you should try adjusting the tolerances : the gap between the valve and the motor body seems to be big and the pressure drops because the air can go from the income hole to the outcome hole easily. But that just a prototype so this is really great and I wouldn't be able to make this myself !
You Are a nice TH-camr
Supposed to be starting work...notice new JohnnyQ video...well, work can wait...
YAAYY SUPERCHARGED ROTARY VIDEO COMING ...........
Making a supercharger is worth the time and money for your channal
Quite the desktop you got there to fit that on there
That twist!
Try this Johnny. On the intake side, and on the cover plate, machine a channel from the high pressure side to the center of the white plastic rotor.
Inside the rotor, machine a channel that gets fed high pressure air from the intake to the back of the vanes to help push them outwards. That way even if the first or second vane dont seal properly, pressure differential around the circumference will push the other vanes outwards, as their outside is receiving less pressure then the inside of the rotor. That way you wont need springs but they will still get pushed out. This also means that at low loads, the friction is reduced due to the nearly equal pressure at the back and front of the vanes but as load increases, the air pressure pushes them harder against the outside helping them seal.
You have also put the hole for the shaft at the wrong spot, it should be at the top with the rotor blocking air flow from high to low, only allowing the vanes to act under air pressure. The way it is now, the air can only act across the 1-2 cm at the top, which is also why its stalling as your air pressure is pushing a single vane down, allowing air to pass straight through.
I was wondering which way around you were going to use that. Air-in powered or mechanical-in powered. Neat!
Interesting video! 🥀🐚🎊
Nice !
You should make a video demonstrating how effectively it can act as an air pump when driven with a high rpm motor 🤓 I’d watch that
Put motor on shaft and you get an air compressor, we used similar constructed comoressor to pressure flour tanks for unloading trucks.
Nice
im getting some vibes for either the V4 or I2 with the size of it, and maybe future iterations could have aluminum vanes with a stainless steel housing, because those vanes are going to melt eventually lmao
That is the principle how servo pumps work. They have thicker core, and are all metall, with 5-7 metal plates sliding in and out. Also, another place this is used is older car air horns, from 60s, 70s, 80s. They have pertinex/pertinax plates spining around.
One major thing with these pumps is, they like a bit of lubricity, better sealing, less friction.
It's nice
Я кроме этих слов ничего не знаю, я РУССКИЙ ПОМОГИТЕ
You have the tools an expertise to make some wonderful things. Have you experimented with tesla turbines or vortex tubes?
If your inlet and outlet are both on top of the housing then the rotor should also be above the centreline of the housing so that the air can travel around the rotor and the most work can be extracted. If like your build the rotor is below the centreline the air basically short circuits and travels above the rotor instead of around it.
nice
I usually see rotary vanes in vacuum pumps, i wonder if this could work as a 1 stage rotary vane pump? They usually use graphite for the vanes
You should make a mini rotary engine😆🤙
grate piece and work, but you should put the inlet in the narrow part and displace it in the direction of rotation that you want to turn, and the outlet in the with part it woud have more torque and be more efficient.
Johnny, do you have a tip for a good site in Europe where I can buy micro bearings?
have you tried 123kugellager ?
If you just using it as a vane rotor no need to offset the vanes. Centered up is fine. Prolly get a lot more rpms as the air is not trying to compress.
If you want to make super charger. You will want it to compress air. Offset towards outlet so it takes big volume of air and compresses it then dumps into outlet.
It would also probably help if you changed the orientation of your ports to be more perpendicular to the vanes at the top of their stroke. Currently the fluid has to fight the vanes for space as they come up, creating friction. You're also creating unnecessary loss in the vacuum that forms behind the vanes when the pump/air motor is sealed. Try drilling though the vanes almost vertically if possible to the "rear" side of desired rotation or shaping them to be trapezoidal. This is how hydraulic vane pumps are built. Overall, very impressive design and machining capabilities though. Love your videos and format.
I think you meant to say it's a turbo charger. Superchargers are belt driven.
It is still really cool. You did a good job.
i was waiting for a positive displacement engine for a long time. now that you have the tools, try building an engine that only passes air when it rotates (as in, a true positive displacement engine with no leaks).
this man just hits us with a suprise @9:36
now do one without the air being forced to take anywhere from a 90 to a 135 degree turn on 2 occasions on its journey through the pump. You can drastically reduce the total exposed port area (and thus the amount of time the rotor spends with length unsupported by the inner face) AND reduce the angle of directional change required just by making the ports perpendicular to the inner face. You can also manufacture the rotors out of PTFE to reduce friction further.
Should do a tour of all the things you've made
Would having very soft springs have any effect?
I've also been looking for similar hybrid bearings. Where do you get them?
In your experience which one is the best for air motor? Tesla turbine or Vane or piston? Thx for the video. :)
I have a large vacuum pump which uses the same exact design by driving the shaft with a motor.
sick
Hvac vacuum pumps use a similar concept, i think
You know far more than, but looking at the shaft its getting air on the right and spinning counter clockwise right? If so wouldn't it make it more efficient to angle the intake pipe 90*? Asking not saying you shoulda done it this way
Shouldn't your axel be on the side of the inlet/outlet? That way the air does not have to make 2 u-turns and can just flow around the bottom
You can also use it as a pump!
dat lathe control tho :O
Wondering what brand and or where you buy your mini carbide boaring bars at??? Your videos are truly awesome! Keep up the great work man!
Make the cover clear, would look sick
Wow, those Helical and Harvey end mills are doing you and your machine a grave disservice. Get a Kennametal rep to visit and end the chatter, vibration and harmonics. Love your channel btw.
This is the same principle as the compressor for the air horns I had on my car.
have you ever investigated something like a Peek round rod, or DuPont Vespel material? they're both manufactured for self lubricating, self sealing pump applications, and they're designed to be machined to shape. Worked in R&D on those materials for a few years. SP-21 is expensive but would do it, Peek is cheaper but doesn't have as good lubricating properties, but is more commercially available. not sure if some of the other materials I know of are available on the open market though
I used and worked air powered devices. The intake should be closed and outtake as big as the air in divided the air out in cubic centimeters before it exist port. Usually 8 times as big. The intake to the exhaust should about 160 degrees and exhaust port should be about 170 degrees that way the turban will close with exhaust open. I had a 1/2 ratchet that turned 120,000 free.