Tesla Turbine Build
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- Опубликовано: 30 окт 2017
- I’ve been set the challenge of building an arrangement that can spin a shaft at 30,000 RPM and can do it pneumatically. A Tesla Turbine seemed like the most interesting option, and this is the build.
I've been inspired by JohnnyQ90, so a massive thanks to him for publishing his videos and answering my questions. If you haven’t seen his work, then take a look here:
/ johnnyq90
![Tesla Turbine [Smoke Flow Slow Mo]](http://i.ytimg.com/vi/qL3kCawHMqk/mqdefault.jpg)
![Tesla Turbine [Smoke Flow Slow Mo]](/img/tr.png)
This looks like one of the most successful Tesla turbines demonstrated on you Tube! Nice machining skills!
Nice work. I don't know why, but your soundtrack for "Test Day," put a smile on my face. Thanks
Top notch job David. Good to see you back! You have such an under subscribed channel.
Working at Lawrence Berkeley Lab in the Bay Area, I was tasked in the 1980's with making a hollow spinner that would run at 300,000 rpm. The spinner was of Excel plastic, along with the housing. Clearance was about half a thousandth, and the spinner did get up to speed, with air bearings and a slots cut around the middle. I looked at several dental hand-pieces to learn how to do this. The limiting factor was not air pressure, but the limiting speed of air going through a nozzle. The nozzle was .012 at it's smallest diameter, machined by a tapered reamer.
A very well produced video and some nice machining too. Have subcribed for more.
very kind of you giving credits to JohnyQ90, he is very inventive, and has pretty little equipment in little Greece... great success, i congratulate you!!!!
So jealous of your workshop, nice work :)
Excellent. I absolutely love your production standards for your videos. Have a sub.
Nice machining footage. I have two suggestions: 1) Up your flow. Seal up your air intake port better and check for bottlenecks in your air system. (1/4" fittings vs. 3.8", etc.) It appears that you are bleeding a lot of input potential. 2) Did you machine off / check for disc runout after installing the axle/shaft? It occurs to me that any imbalance at all would severely affect efficiency at high RPM.
Thanks for the video!
use better bearings next time....
Excellent build!
Very nice! I’m surprised you ran it on it’s side with a standard ball bearing, they really aren’t made for much axial load and roll easier when the load is radial, unless it’s one of those funky ones made to take simultaneous axial and radial loads...unless - does the air turbulence keep the rotor centered?
Omg this looks amazing
Awesome! It's like Engineering eye candy!
Ricardo Moreno
.
"Test Day".
Brilliant.
Selfless David made me go on the youtube rabbit hole of Johnny90 videos before I got back to this video
well that was bloody brilliant
this is awesome! i was hoping i saw the almost 100 percent efficiency mark i saw on another video where the rpm went to 50k to 70k in almost an instant. but still this is reallllly cool
That disk/housing outlets create that siren noise. If it's too loud, I suggest to use different long slots to deharmonize that interference.
Well done all the best from John in Texas
Hi David! how thick is the block in aluminum?
the two bearings, what sizes do they have?they are also flanged ? Hi David !!!
Hello !!! the bearings are flanged? do they have the rubber seal?
Impressive!! 👍🏼
Nice build 👍
Brilliantly been built.
nice workshop!! what model and brand are u lathe and mill?
Nice machining work.
Could you arrange the rotor to have a step pattern for the exhaust hole, I think it will give a jetting effect.
Smooth build. Love the machine shop work and the video work. Did you have to do any balancing, like they do with clock balance wheels on a sort of "parallel bars" gadget?
Nice shop !
David, Just saw this and must say; Very well done videography and build. Enjoy JohnnyQ's work also. There is also another YT person, PlasmaStar9 that built some incredible T-Turbine models a few years ago. I didn't see much in your video about the inlet nozzle setup and curious about your methodology regarding angles and nozzle types. Pretty impressive speeds at 8-10 Bar! Also enjoyed your attention to detail during machining, like moving the chuck to the mill. Sub'd and looking forward to more. Thanks for sharing your work here! ~PJ
Thank you, I really appreciate the feedback. In the video the inlet nozzle was just the end of the air gun. But after the video I tapped the hole the air gun was pushed into and made a brass nozzle with a 3 mm diameter hole. It made a huge difference for the better in performance
Wooow 👀 Impresionante el Alto Nivel de Eficiencia de ese tipo u Modelo de Turbina. 👍 Te Felicito 🌟
Nice work bro!
That is a piece of art
Good Job!
An amazing piece of work.....can't think of a single practical use for it though, especially with the bearings he uses.
Did you try to replace the ball bearings with air bearings? The flow of air is right there. Will not rumble.
So Cool!
what pressure were you using at the gun i know the tank said 8 bars
I don't hear it reaching the resonance between centripetal and centrifugal forces, can you make that thing spin faster maybe with a higher pressure? Btw, the centripetal and centrifugal forces I mean are the result between air flowing from the outer side and forced to go out from the center, and the air that's being thrown away from the center by the discs themselves. When that happens both the forces act as a single force over the discs and make the rotor spin at the speed of the airflow.
Run it on in vacuum and on cold steam
The holes need to more like a rectangle port, possibly canted along the shaft axis.
7:00: Is that Apollo moonshot radio chatter in the background? Way cool.
Hello!!! what size do the bearings have?
What was the air pressure amount and HP on the air pump ?
great vid
Well you knocked that brief out of the ballpark
Hi David, I tried to make something similar but it didn't work because I tried to machine the rotor in one piece using a parting tool for the grooves and I think the discs were far too far apart...how thick is the brass that you used?! Very nice video btw...I have the same DRO :)
is the parting tool you used is 1mm ???
all that and a bag of chips! excellent! youre a true meister!
You mentioned having a client, do you routinely fabricate custom works? I've been studying the Tesla coil and compressed air engines and would like to convert but lack the workshop, tools and resources to build everything myself. Do you have business cards?
Hello Ben. Working as a machine shop isn’t something I’m interested in doing, but thanks for the comment and I’m sure you’ll be able to find a local fabricator to help you out.
Good job! Its importatnt to note the
British Patent 179,043 - Improved Process of and Apparatus for Production of High Vacua should be put on either side, your efficiency would boost up to 50% We are experimenting with this now. Nikola Tesla says this himself in the patent.
Odd question maybe. But is this type of turbine suitable for low rpm, low torque applications? Efficiency is not an issue, low friction is.
How can we make use of this engine and whether it is economical and provides a large amount of air to take advantage of it and can be operated in this way an electric generator by air and thank you and more
wonderful...
I wonder how this concept would work as a turbo? Add a compressor wheel and hook the exsaust where you hook the air hose to spin it.
Could you make a Tesla turbine with discs which has ~50mm or 70mm or 80mm so the case has 80mm and you turn to the right diameter.
Marvellous
where did you get that auto center punch? It looks heavy duty. Thanks
Hi Mike - it was from here:
www.chronos.ltd.uk/acatalog/punches_scribers.html
Hi Josh - I’d love to help but I think I’d be getting a bit out of my depth, but good luck with the project.
what kind of torque can these turbines develop?
Does it have any Torque? Would more discs equate to more torque?
What type of lubrication for the bearings? I'm wondering because I figure much of it will be flung off by centripetal forces, and the super-high rpms is likely to create a fair amount of heat?
I could lie and say I used a special bearing oil, but actually I went for the high tech solution of 3-in-1 that I found under the kitchen sink. In fairness, it worked really well.
Thanks! Good to know. I suppose it doesn't matter that much.
Just being silly: I wonder if lubricants for dental drills (also insanely high RPMs) or car turbos would make any significant difference.
Are you building in a reversal mechanism so you can make it spin in either direction? or just unidirectional to start?
Any chance you are selling these? I'd be interested...
I have a serious silly question.. What would happen if you used hard drive discs instead in this turbine. I just thought of it seems silly or is it.. they are slick and smooth and perfectly round..
where can I find a blueprints for this?
Whats the Torque on a system like that?
Excelent, how PSI???
nice, now make and add in a small venturi tube into the airline Turbine inlet and get even more power for less PSI
Great video. Track? Loved it.
Excellent. Is there an equation that could should power input and power output relationship? At least an estimate?
If you assume that the air within the boundary layer has equal velocity to the rotor then you can use the equation:
E = (1/3)*p*Pi*h*(R^4)*(w^3) to estimate the energy for each disk in the rotor.
Where p is air density, h is the disk spacing, R is the disk radius and w is angular velocity in radians per second.
From what I can tell in this video, the disks are about 6cm wide with a 1mm spacing, but I can't tell how many disks there are.
From the theoretical model I would estimate that each disk is receiving about 62 joules of energy. Would like to see if this is consistent with the physical model.
thks a lot David. Can you recommend a source / book to study these type of equations? Herri
Oh, I'm not David, I'm just a Mechanical Engineering student modelling the Tesla turbine with kinematics for fun. Going to make one with 140 rotors during mid semester break.
The best way to find the input/output relationship for the physical model is to measure the energy at the intake against the energy of the exhaust. Hopefully David can do this for us then I can hopefully verify my model.
So how do you get the air into a stream to make this efficient? Oxygen tanks?
I think you should get a bigger compressor volume, and try this again. The RPM was still creeping up, in other tesla turbines i've seen this is normal until it hits a specific RPM then suddenly it will get quieter and rocket up in RPM, that's when the turbine is running efficiently, you're losing a lot of energy to vibration when the air noise drops the airflow becomes laminar and the majority of energy is being transferred to the rotational energy.
Could you put load to the shaft, to find out, how much power it can make?
this is the million dollar question for ALL tesla turbines. neat toy that has only enough torque to spit itself. never under load.
@@__shifty Yeap, nice toy, won't move any decent load, sounds pretty nice but is just a toy😁
Nice
Have any hobbyist and/or youtubers made a Tesla turbine that uses air-bearings instead of ball-bearings? I wonder if that would be a significant improvement in raw rpms.
Chamber ID too close to disc OD inhibits even distribution of fluid around perimeter of discs?
Ciao !!! Poso avere anche io il progetto, disegno di questa turbina?grazie !!!
Wonder what the duty cycle is on that.
Does anyone know if a Tesla turbine has been used a high speed spindle in PCB drilling or PCB copper routing?
I see PCB air turbine spindles running at 100,000rpm, but I don't think these are Tesla turbines.
What are some of the application of the Tesla turbine? Is it used anywhere currently?
This is obviously very cool. However, I have been wondering just how can this tech be used? I've been aware for a long time that this exists but fail to see a really good application. I would appreciate some suggestions. Thanks.
If used within a cryophorus loop the cold steam flowing to a condenser can spin the turbine, with a difference in temperature maintained between the cold steam and condensate in theory you can harness the flow to generate electricity
@@vincentschuler2408 What kind of power can this device produce? I like the potential of this.
I like the song at the beginning of the video. what's it called?
Hello, if I want to buy one from you, it is possible. Thank you for answering.
What do you think of the work being done by Paul Townley (Grav Inert) with the Tesla Turbine patent? He claims to have worked out and understood a series of Tesla patents that when combined together create a super sonic Cold Steam machine Tesla turbine. Essentially natures tornado connected to a shaft with its fuel source as that of only the air around it. ie the compressed air isn't required, it will feed itself when taken to subsonic rpm speed from the air around it.
That sounds like being hoisted off the ground by pulling up your pants too fast.
What is the power input?
hi can you make these in 5 or 7.5kw class?
What did this cost to build in equivalency to USD?
would love to order/purchase one of those?
Very good. ;-)
Probably too small, but precision bearings for dentist-drills are rated for insanely high rpms.
Bellissimo.
I would like to know how much it would cost for you to make an exact replica for me. If you prefer not to make the same thing twice, I have a design that makes the turbine more efficient and you could try making that 👍
Lovely...seems very slow getting up to speed ...can't have much torque? What can it be use for?
Wow far from the truth, Its too efficient when up to speed, you couldn't make much money on something that doesn't wear out, it would save too much fuel, the oil companies would benefit less and this is why we use internal combustion engines.
Tesla advised to add washers on the outer disks, for start up torque.
The military used it as a pump when nothing else would do the job.
The tesla turbine is one of the most efficient designs that exists, but it's torque is absolutely pitiful, which is why it has nearly no purpose. Additionally, the disks tend to warp as well.
i could blow on it and get high af without taking on drugs
What would this be used for ?
Great stuff but being an older person cant hear you with the music in the background (turn iff the radio next time?
Not to be unfounded I give the reference to video of my model of the micro turbine Tesla with a rotor with a diameter of 66 mm which gives 2,4 kW of electric power on the generator - ruclips.net/video/1_b28Wjs_NY/видео.html
ruclips.net/video/S9ot2O1XX9Y/видео.html
1. Width of the main disks has to be less, or is equal to width of gaps.
2. exhaust windows have to possess a sufficient flow section (which is defined proceeding from mass flow of a working body and its speed)
3. The nozzle of the turbine needs to be calculated precisely proceeding from mass flow of a working body and a flow rate on escaping of a nozzle. The nozzle has to be surely located on tangential to a rotor, otherwise we lose a large amount of energy. The gap between external diameter of a rotor and a housing should not exceed 0,5-0,8mm, depending on the speed of rotation and stretching of disks by centrifugal force.
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Tesla Tech hi, I have a similar project for a 24KW alternator... I was wondering if there's a formula for the size, disk diameter and thickness and disk space.
I admit, for this purpose I have no precise formula.
Have you time to do a video in english that has focus on power in and out ? Do you use ceramic ball bearings?
Damn. 40,000 RPM? Did you manage to take some temperature readings using a pyrometer?
No, but I don't think it got very hot at all.
Why would it get hot? Admittedly, the Tesla turbines efficiency is moderate at best, but still, it is continously cooled by air.
the efficiency is awesome, until you apply load.
Tesla turbine is one of the most efficient designs that exists... but the torque is pitiful.
Why didn't you use discarded hard drive platters and bearings?
Average speed are usually 7200 RPM so it would have been be better suited
Are 19 large discs and 18 small discs? what diameter do small disks have?
Hi. 50 mm for the larger disks, 16 mm for the smaller disks. There are about 20 of each.
Seems like the steel bearings would wear out quickly. Thank you.
intiresting
Just a thought, would it not be easier to use mini CDs
I think they would be too thick.
bit like my line of thinking...
Why would one not want to use a Tesla Turbine as a ram air generator for an RV (while driving, using a naca type duct) battery bank? Thank you!
because it has a really low torque
The second stage makes it 50% more powerful!!! I show this.
iEnergySupply what?
@@rawsteel6443 Tesla talks about putting a pump on the turbine, to rapidly exhaust the back pressure in the turbine to increase it's efficiency.
@@iEnergySupplyok, now I get it, even I want to see a version with both the stages. Hopefully it will be more efficient than a traditional turbine
@@rawsteel6443 I've proven that it is, and one of the greatest scientists of all time agrees. I got the idea from him...
@@iEnergySupply didn't know you had a channel, great channel by the way,. But then why do we still use regular turbines if the Tesla terbine is more effective?