if you have one of those "electronic kitchen scales" you can let the output arm push on the scale and measure the weight (i.e. force / 9.8 [kgm/s2]), and then work from there (arm angle when pushing down, delta rpm). delta rpm will be input rpm as the output arm is being held by the scale top in equilibrium. this is of course assuming the arm does not break or slide over the shaft. excited for the new videos, please keep up! 😀 also maybe measure separately the transferred torque due to static friction when there is no oil in the chamber to be precise.

Stalling is not when a fluid coupling is "locked up one to one"(Which it never is supposed to be(Without a clutch) as it works on hydrodynamic principles), stalling is when the pump is rotating but the turbine does not. Edit : Just wanted to add that the video is quite damn cool anyway.

Yeah, these are the key part of an automatic transmission on a non-electric/hybrid car. This allows the gearbox and engine to do whatever they damn well please and still have the wheels receiving smooth torque delivery. You can start out in second gear when you have slippery conditions on the road without worrying about clutch wear because it's being operated as it would be with a normal gear change.

I worked at exedy(one of the largest torque converter companies in the us) for a few years, the impeller blades has a bit more of a curve to them to make the fluid flow in a loop more efficiently, kind of like opposing fan blades

The neat thing about fluid couplings like those found in automatic cars and trucks is that they are designed to multiply input torque before they stall and become a one-to-one coupling, making it easier to get the vehicle moving

That's a really cool design. and great explanation on how it works. One thing I'll mention about your testing with the arm and water bottle. Once the arm reaches the upwards position the weight of the water is no longer applying torque to the output shaft, rather it's just pulling down on the coupler. Something I would suggest is making a pulley wheel where the string wraps around circularly and has a constant torque.

Man I love this style of video, it’s not some “engineer” making a 20 minute video making something stupid and MASSIVELY overblowing simple issues, you are more like an actual engineer/mechanic you know what you’re doing and you’re confident which is very refreshing to see, and the presentation is superb, no music, no hyper energetic moron, no montages, just a man building and explaining, well done.

This is extremely cool, never seen anyone sit down and make a torque converter from scratch before, let alone one that works so well!

First time to see someone made a hydrodinamic clutch

THIS IS AMAZING, PLEASE KEEP THIS SERIES GOING!

great video as always, really enjoying these 3d printed spinny thingy mechanisms (like car parts but not necessarily limited to stuff used on real cars). keep it up!

Thank you for explaining the concept in the very first second of the video!

The first ever dude that I've witnessed to make a torque converter :D Earned a sub.

Very cool - quite impressive to have such an effective transmitter of torque with just simple 3D printed parts and hardware. I can see this design being useful for applications where the 3D printed material is at risk of breakage. A coupler that will stall before the breaking point of the material would be really helpful, the one depicted here is just *too* effective. Nice work!

GREAT VIDEO! I mean, yeah, I learned a lot about the subject matter, but for only 33 videos? The video quality, sound, lighting... you look and sound GREAT! I'm impressed! New subscriber! I think I can learn a lot from you! You have clearly made a time investment on the video here!

Great work, keep it up 👍

Very nice video! Thank you!

If you curve the veins more like torque converter to flick the oil faster you can actually get a faster speed out of the fluid coupler. I don't know if this reduces the torque slightly (I think it dose but I'm not sure).

I, like you, enjoy building and creating. I have been dabbling in the arts of electric and mechanical engineering for 25 years as a hobbiest. I find your videos to be inspiring amd well made. Well done, my new subscription. Well done! Put that together with your gas engine and make a fully (mostly) 3d printed RC car!

Great content!

This video somehow reminded me of an experiment i did as a kid where i attempted to design and build a "Non-newtonian fluid clutch" that was supposed to connect an input-shaft to an output-shaft when applying pressure to a non-newtownian fluid which in this case it was good old cornstarch and water mix aka. Oobleck. The applied pressure would then cause the non-newtonian fluid to solidify/ "stiffen up" between two "gripsurfaces"/ impellers causing them to lock up and transmit force between the two shafts. Despite all my enthusiastic effort involving few a different designs/ modifications to the clutch, the non-newtonian fluid and fluid level used inside the clutch i never got it to work properly (In my defence the only resources/ i had available at the time was a small vice, a drillpress and a dremel tool plus a few other regular handtools like hacksaw, hammers, files and screwdrivers and of course no internet. IIRC one of the first driveshafts i made was made out of a long nail)😄 I guess if it had ever been sucsessfull enough to make it to the commercial marked i could have coloured the non-newtonian fluid blue and sold it with the slogan "gets stiff and gets you moving" 😏

You can fix a torque wrench to the output and in/decrease the torque as needed

Awesome! 😁👍 I've seen other people put an output arm on a set of scales and measure the torque that way.

Such a cool video, next step make a big ass one with the internal one way spinning turbine

Also you should clamp the housing down so it's not interfering with the test because it's basically a clutch in an automatic transmission

really cool idea!!

This would be cool on an rc car.

This is awesome! Do you release models anywhere so people can print their own?

Exceedingly amazing hair style

0:16 crap😂😂😂😂 i saw many episodes of your channle but this particular video made me to subscribe .

The turbulence inside the fluid coupling will generate heat. That's why most fluid couplings are made of aluminum and have fins on the back side. Aluminum is a good conductor of heat and the fins increase the surface area. I'd would be curious to see if your fluid coupling begins to distort after transmitting power for more than a few minutes.

Interesting work

The "a-boot" gives you away, my Canadian neighbor.

I still have no idea how it works but it's rlly cool

great vid, i recommend getting a resin printer with clear resin

Gotta send this to the torque test channel

Wow! Awesome video!! Without your specific story telling style, I would have missed out on the surprise that it broke the arm off on the test that it did. hahaha! Thank you!!

I'm surprised the oil doesn't froth up and become less effective. Never heard of a fluid coupler before but that's amazing.

That description of the fluid is one of the things that could happen, but at higher pressures (ie higher energy) everything that can happen, will happen, and you end up with the opposite flow at the same time, so they cancel out and it really just creates high pressure at the edge.

When measuring the torque, the shaft should be horizontal, otherwise the torque applied by the bottle would be lower. Of course, it has to pass through the horizontal position anyway, but the bottle has momentum by that point

Nice high stall torque converter!

Do you know what years they started to put them in cars and if they still do?

LETS GO FIRE

Very interesting......... One question, what would have if you replaced the fluid with a non-newtonian fluid?

You could print a flange gasket out of TPU.

This is how Koenigsegg regera direct drive Works very cool project 👏

Would it be possible to use this in line with an up hill flow tesla valve? To be able to get high pressure water to the top of a hill while allowing for hydo power also??

You can calculate the dynamics torque if you connect a electric generator on it and measure the power output in kw ,then add the energy loses and last take the equation hp = torque/rpm and solve it for torque

thats cool! custard instead of oil?

I was always interested in torque converters so this video is great. hydraulic cylinders next?

You could have used an analogical or digital scale with a hook on its end. In my opinion it would have showed much detailed results.

magnetic coupler, alternating magnet to a copper inverse magnetic field induction plate

Have you thought about adding a stator to for the torque multiplication effects prior to it hitting its stall speed?

How reliable have the TPU shaft seals been?

Sorry for the non metric units but the logic should follow, most drills have tourque ratings in the hundreds of inch pounds. So worst case say its 100inch pounds, say the converter is only 50 percent efficient, that puts 50 inch pounds on that arm. A full water bottle is about a pound, to stop that shaft the arm would at minimum need to be 50inches long

You need to turn the whole thing upright like a top when adding the oil, you're losing half of your efficiency leaving air inside of the torque converter, it needs to be filled to the max.

Saline Teacup for the nose. Its my only legit solution for clarity in my own speech. That and not being overheated with a swollen tongue.

Buse a fish scale on the armature also fluid couplers actually multiply torque so its going to be more torque than your drill is providing. Muxh more rhan a few water bottles

Idk precisely how much torque you can provide with your arm, but I'm quite sure it's a lot higher than like 0.3N/m (a high estimation of the torque on the axle) so I think a better way to test this would be using a heavy weight or a water dispenser bottle

Actively change fluid density with ferrofluid and electro magnets

I wonder if this type fluid coupling would do for some highly geared bicycle... Thanks for the video!

"The fluid coupler should last as long as the vehicle itself." *Angry ZJ noises*

awesome clutch! would it be possible to have a clutch optimized to work only with the steel bb's?

The biggest issue with torque converters is that they can never be 100% efficient. A clutch, once it has fully grabbed, will spin with the two sides locked together. The fluid always has frictional losses of a few percent though. But they are just so incredibly effective anyways that they can still apply very large amounts of force and they still have a very high efficiency for anything they might be compared to. Honestly, if they were cheap they might be a good way to power a bike from a SMALL engine because at low revs they wouldn't over power the brakes, but they might have a higher top speed than most bike engines do because they lack any sort of transmission. Torque converters and turn speed into torque though and the greater the difference in speed between the two sides the greater the torque produced as the fluid imparts all of its momentum onto the vanes of the receiving turbine. Long and short is I have wanted to put one on a bike to see how well it would work but automotive torque converters are not fit for the purpose.

I think you should get an endorsement deal with JB Weld

manual transmission vs torque converter . And which one get more efficient torque output ?

Just attach a torque wrench to the end. It will tell you exactly how much it's putting out

Fluid coupling may be an excellent solution for use with a diesel engine driving an aircraft or helicopter propeller. It could potentially be a "buffer" to reduce torque changes, to smoothen the vibration from the engine to propeller/drive system. These effects are from what I understand basically one of two challenges in using compression ignition diesel engines in aircraft.

May I make a suggestion? Prony brake

Interesting concept Seems like a great way to help with wear and tear of a clutch 👍 What are you planning to use it on?

Well, you've already made a torque converter, you're more than halfway done to building an adjustable dynamometer

Use it as a torque converter for the engine attached to your transmission.

I've been wanting to make a gokart clutch like this so it would never wear out besides bearings

I would be more interested in the dynamic torque produced by this. Also how efficient is the power transfer?

just use a load cell to meassure the peak torque

Landrover Freelanders use a fluid couple for "active" 4x4..

Evil genius goatee 🤣

Do you publish the .stl files anywhere? Patreon maybe?

Could you please make a 2 cylider gas engine with your 3d printer

Did you upload the stl files I'd love to print this and use it in a few things also in the automotive world this is called a torque converter

Here I am now staring at my Rc car... And a Toyan Engine I have laying around🤔

What is JB weld? Im always looking for something to glue my PLA peices together, so far epoxy is the best ive found.

What would ferrofluid do? As I understand it it changes effective density and viscosity as it responds to magnetic fields, could make an electronically controlled variable torque converter! Would be exceptionally interesting if it included its own generator and act like a governor!

Комментарий в поддержку канала и ролика, а также труда мастера.

You should add this to a nitro rc car that's heavy so it simulates an actual car but small sized and not as heavy

what is Jbweld?

How can you be sure the rod isn't transmitting torque through the case, when the case is spinning?

Habor freight sell digital torque meters.

Add a stator and turn that slip into extra torque

Lol did u see my comment on the last video u made cuz I think I said something about making a 3d printed torque converter or something it's basically the same as fluid coupling

Why don’t you put the arm onto a scale and measure the torque by torque=force*distance? Think that would work :)

Put a fish weight scale on the armature

Is this even working as a fluid coupler? It seems like the rotating seals on the outside housing might just be grabbing the other shaft by friction. Maybe you could try an empty test to check for housing to shaft friction, but the variability of plastic parts might confound that if you don't use the exact same pieces.

actually, it is a hydrodynamic cvt

Connect it to a torque wrench, spin away and watch

Cool beans.....

how about putting something non-newtonian like oobleck

Nah that was personal 0:16

this is but it isnt how a fluid coupling works. sure, centrifugal force flings the oil out, gives it velocity. without it, they wouldnt work. there is no reaction or impulse effect used in transferring power. rather, its the sheer strength of the fluid having velocity. think of the oil exiting the tip of the pump as pins, engaging with slots on the turbine. a lovejoy coupling. a very... _squishy_ type of lovejoy coupling... the pins strength is determined by the velocity of the oil. and its viscosity. the faster the flow, the stronger it is. the coupling strength controlled by the number of "pins". more blades! the oil flows in a spiral path, a vortex... much like a spring. the more turns, the harder it is to sheer that spring down its length. the oil though, upon exiting the turbine and re-entering the pump, is flowing in the wrong direction, and the resulting flow is a chaotic turbulence. heating the oil up, wasting power. the torque convertor is slightly different in that it still uses the sheer strength, but it also uses fluid velocity and the reaction to its change in direction in the turbine. the oil leaving the turbine, now flowing the wrong way, is redirected by a third member to flow in the same direction as the pump, and again, there is a reaction on the pump blades, assisting them, from the fluid velocity and its change of direction. as the fluid velocity increases, so does the sheer strength and coupling effect, combined with reaction forces, so that when the turbine is stalled, not rotating, oil velocity is at a maximum and torque is multiplied, because the power that wasnt being transferred then acts directly back on the pump and assists it in trying to transfer power to the turbine... fluid couplings dont multiply torque, they consume it. can happily run them slipping at 2:1, but the torque transferred will be less than half, unlike a real 2:1 gearbox that would double the torque. all that power will dissipate as heat in the oil... a torque convertor will be amplifying torque, but due to slip it will always be less than a true gearbox. you never see small torque convertors because they dont scale down. its all about diameter and RPM to get the fluid velocity up. the bigger they are, the lower the stall speeds. fluid couplings can be made small because generally theyre used where inefficiency doesnt matter, its about the soft squishy coupling forces, limited torque transfer, ability to withstand such conditions without failure... go ped made one... lol.

7:19 wait a minute you put the TPU coupler on there and then do a jump cut and there’s no more TPU coupler.