My Last Chance to OVERPOWER my Vacuum! (Homemade Turbine V2)

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Күн бұрын

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In this video I will try to OVERPOWER my Vacuum Cleaner one last time with the help of one of my viewers. He designed better impeller models and in combination with a new BLDC motor and driver, we want to find out whether we can beat the original design. So come along as I test static pressure, air flow and run into lots of problems during this last attempt. Let's get started!
Thanks to Rohde & Schwarz for sponsoring this video.
0:00 DIY Vacuum Impeller got Destroyed!
1:12 Intro
1:57 Measuring Static Pressure of DC Motor
3:22 Old DIY Impeller Design Static Pressure
5:35 NEW DIY Impeller Designs
8:04 Practical Vacuuming Test + PROBLEMS
10:03 Verdict

Пікірлер: 784

@henninghoefer 11 ай бұрын

It's almost like the Bosch engineers knew a thing or two about designing a vacuum cleaner 😆

@greatscottlab 11 ай бұрын

Haha true.......next time I beat them ;-)

@malanvogt 11 ай бұрын

It's like the one time where bosch engineers designed something that sucked and it was a good thing

@drleewhite 11 ай бұрын

It’s like the saying that anyone can build a bridge with enough steel and concrete, but an engineer will build one that is efficient in use of materials, adhering to time, safety, and budget constraints.

@realdragon 11 ай бұрын

And have a little more resources available than just 3D printer

@jameshancock 11 ай бұрын

Actually the only major difference is that Bosch uses Glass Fiber PA6 nylon. So the strength is WAY up. But you can easily 3d print it.

@Dcl2037 11 ай бұрын

From an ex vacuum engineer - it isn't as simple as either 'max flow against no back pressure' or 'max pressure pull with no flow'. What matters is the inbetween, and whether your impeller performs well in series with the back pressure of the vacuum's filters. Vacuum cleaner companies use a metric 'airwatts' to characterise it - pressure times flow rate (in SI units) actually cancels out to watts, and you can compare your electrical power in to your air moving power out!

@greatscottlab 11 ай бұрын

Thanks for the feedback :-)

@DrGooseDuckman 11 ай бұрын

Amazing info! Your old job sounds cool as heck too btw.

@Komeuppance 11 ай бұрын

@@DrGooseDuckman it sounds like it sucked... a lot.

@greatwavefan397 11 ай бұрын

@@Komeuppance Get out.

@ladmad9196 11 ай бұрын

also called P/Q-Curves

@tiborklein5349 11 ай бұрын

You should take a look at the way cutting discs are attached to angle grinders. They are held on by a nut that's threaded opposite to the spinning direction. The centrifugal force keeps them tight, they will never come undone on their own.

@s.sradon9782 11 ай бұрын

that would be hard to implement here, then again he can fix a coupler to the shaft and drive a bolt into the coupler from the top of the impeller but that solution would be bulky.

@xxportalxx. 11 ай бұрын

@s.sradon9782 he could try to thread it, or get one that's threaded

@first-thoughtgiver-of-will2456 11 ай бұрын

At the risk of being pedantic wouldn't that be the equal but opposite tangential acceleration?

@tiborklein5349 11 ай бұрын

@@first-thoughtgiver-of-will2456 You're asking that with the bold assumption that I know what that means...

@xxportalxx. 11 ай бұрын

@first-thoughtgiver-of-will2456 at the risk of sounding pedantic (and maybe antagonistic) it's actually the interplay of normal/frictional/inertial and drag forces. Centrifugal plays no real role in holding the nut on, and acceleration only plays a part at the start of the motion and in the form of vibrations.

@drunkduck274 11 ай бұрын

I hope you do part 3 and keep leveling this up. Even if you buy a dyson, its fun to learn this stuff!

@ryanstanz6364 3 ай бұрын

Please do a part 3 and beat the original

@DirtyPlumbus 11 ай бұрын

I never would have thought I'd watch a 3 part series about a vacuum cleaner. Lol

@greatscottlab 11 ай бұрын

3 parts? Only at 2 parts so far. But who knows what comes next ;-)

@DirtyPlumbus 11 ай бұрын

@@greatscottlab I'll be waiting. 😉

@dragoongalaxy20 10 ай бұрын

@@greatscottlab this person is ready for a 3rd part, just like me :)

@quintinbouwer4501 11 ай бұрын

Create a black hole

@greatscottlab 11 ай бұрын

Maybe next time ;-)

@20vK 11 ай бұрын

Buying the famous vacuum brand will create a black hole in his wallet all by itself

@nhand42 11 ай бұрын

Put a groove on the end of the motor shaft - spin it up full speed and use a triangular file - and then a circlet will keep the impeller in place.

@greatscottlab 11 ай бұрын

Oh boy. Love that idea. Will try it in the future

@quelixfenzer5108 11 ай бұрын

To transfer the torque better and make it easily removable you could also use equaly spaced grub screws. or if you want something non removable you could grind a divit in the motor shaft and also some in the 3d printed hole and then glue it. That way the glue will not just keep the rotor from slipping but instead mechanicly lock it on the shaft

@RossReedstrom 11 ай бұрын

@@quelixfenzer5108 once you've gone to the trouble of grinding a axial slot in each, just go ahead and install a key: that's the traditional solution to transferring torque from a shaft

@lazar2175 11 ай бұрын

@@RossReedstromYou cannot key a shaft this small, that looks to be smaller than ∅5mm. Well, you can - it just wouldn't make very much sense, shafts this size are usually secured using "dog point" set screws, with according holes in the shaft, or with cone point set screws if the shaft must not be weakened further. Removing material for a keyhole from an already undersized shaft isn't a great idea. I'd bet a regular pair of set screws with flats would serve him right and it would all be achievable at home using a file and a tap.

@scientificidiot4165 11 ай бұрын

@lazar2175 if he really wanted to he could use an edm machine to make the initial hole and some specialized tap for hardened material. I don't know much on the tap side, but an edm can cut through any hardness of metal.

@bjn714 11 ай бұрын

I just want to say that also printing an impeller removal tool was a very nice touch & not something I expected to see. Great job!

@greatscottlab 11 ай бұрын

All thanks to Marko ;-)

@bjn714 11 ай бұрын

@@greatscottlab Nice! He was definitely thinking ahead there.

@matthewellisor5835 11 ай бұрын

For part three, maybe include a "turbo button" with a 30s timeout that runs the motor at ~95% of the maximum that the motor and controller can handle and run it at whatever level the lady deems acceptable all other times.

@fusseldieb 11 ай бұрын

Dyson already does that

@ozgundenizkucuk 11 ай бұрын

@@fusseldieb Oh my god. Noo waaay.

@matthewellisor5835 11 ай бұрын

Roger that, I own one. I was curious about how our friend here would implement a similar function.

@chikogota 11 ай бұрын

the actually vacuum cleaner is a turbo, but instead of using exhaust gases it has an electrical motor, whatever it sucks instead of going to the engine goes to the bag

@nikkiofthevalley 11 ай бұрын

@@chikogotaThey said a _turbo button,_ not a _literal turbo._

@sindrehansen9647 11 ай бұрын

Add a boost button to overclock the motor for short periods of time, if you get in trouble spots

@greatscottlab 11 ай бұрын

Good idea

@Cheese_1337 11 ай бұрын

overclocking vacuum cleaner, sounds cool

@stepheneyles2198 10 ай бұрын

I can hear his girlfriend complaining that her knickers got sucked into the vacuum when she pressed the boost button!! 😆

@nikoladd 11 ай бұрын

The closed impeller design they used can make a massive difference for static pressure. On impeller to motor connection just get some metal(alluminium) hub for plane/car model motors and make the impeller connect to the hub instead of the motor shaft. This will introduce much higher surface and possibly hard connection to it.

@toolbaggers 10 ай бұрын

3d printing is not suitable (not yet) for something that needs to be as precise and strong as an impeller.

@largepimping 11 ай бұрын

I'd like to publicly acknowledge how much Scott cares for his girlfriend. Clearly, her ability to quickly and efficiently vacuum his apartment - and, therefore, *her* quality of life - is hugely important to him.

@gamesnic 11 ай бұрын

He for sure is a huge feminist and not old school

@solinus7131 11 ай бұрын

@@gamesnic????

@nikkiofthevalley 11 ай бұрын

@@gamesnic???? What?? Caring about women is not feminism....

@gamesnic 11 ай бұрын

@@nikkiofthevalley it's exaggerated to be a joke.

@toolbaggers 10 ай бұрын

If he really cared for his GF he would do the vacuuming himself.

@arigatouse 11 ай бұрын

Would be a costly surprise if it actually sucked up all the water and spilled to your lab bench.😅

@greatscottlab 11 ай бұрын

Happened off screen with the commercial solution. Luckily it was not too much.

@ayushp.5395 11 ай бұрын

@@greatscottlab that must pack quiet a punch!

@RegisMichelLeclerc 11 ай бұрын

@@greatscottlab Actually, RC Test Flight reports it happened to him too 😀

@methanoid 11 ай бұрын

Was in Germany last week and met some Rohde and Schwartz engineers. Lovely guys

@greatscottlab 11 ай бұрын

Awesome! :-)

@tylercollins4125 11 ай бұрын

you should try getting the impellers SLS or SLA printed. It should help with airflow by having a smoother surface, and the SLS one can be CF Nylon, which should be plenty strong and light for this application

@ImTheReal 11 ай бұрын

Strongly fixing the rotor to the shaft will solve a lot of future problems.

@greatscottlab 11 ай бұрын

Yep. That was the biggest problem. I hope to reliably solve that in the future.

@triaxelongd3337 11 ай бұрын

@@greatscottlabi would prrsonally use a small worm screw that goes trough the impeller and grabs the shaft.

@BH4x0r 11 ай бұрын

@@triaxelongd3337yes grub screws would be great for that, especially if he makes a lil groove in the shaft for it to bite in, or even better use an actual pinion RC gear for one of those motors and something in the impeller that can hold onto that

@youkofoxy 11 ай бұрын

@@greatscottlab I would make the shaft something like a screw, or add a groove and use a retaining clip.

@linuxranch 11 ай бұрын

I wonder if a duplex impeller, with a single inlet and two outlets would balance the thrust forces against each other? There would have to be a new inlet scroll... The "two" impellers would be "attached" at the inlet end.

@RuthlessMojo 11 ай бұрын

A grub screw will help with keeping the impeller on. It will have to be factored into the design. As far as the impeller is concerned you could try carbon fibre filament, it may be stronger. The other option is creating a silicone mold of it and using a casting resin or making a clay mold,and using aluminium to cast the part.

@ivopenev7105 10 ай бұрын

Or simply buy the cold side wheel from a car turbo which is pretty much the same shape.

@cordellsmith1523 10 ай бұрын

You might be able to alleviate the impeller pulling itself off by implementing some set screws. This of course though means redesigning the impeller and also adding some rotational weight.

@ChrisWilliams-pu8pj 11 ай бұрын

Love your persistence. Enjoyable!

@vacuumtests9225 9 ай бұрын

Wow very interesting video! I have done a lot of airflow and suction measurements and most important for good cleaning power is the airflow from the floor nozzle. I have dedicated airflow/suction box for that. I can seal floor nozzle to the box and get very accurate readings.

@boloren 11 ай бұрын

Be sure to check out the Tineco Pure One. We have several clients with handheld Dysons that we occasionally use if we're just adjusting something or didn't make a big enough mess to grab our Festool shop vac from the truck. One of these clients replaced theirs with the Tineco when their Dyson died and couldn't be repaired. The Tineco is way quieter and feels less like it's been overly value-engineered (just feels more solid in general).

@Ebits21 3 ай бұрын

I have one and like it a lot. Can vacuum with the kids in bed.

@TommyCullen-VacuumConnisour 2 ай бұрын

Filters clog up though, every none dyson bagless system is kinda crap.

@youkofoxy 11 ай бұрын

GLAND SEALING SYSTEM. is a technique used in steam turbines to make the bushing "air tight" without having contact with the shaft. Try adding it to your design.

@mrmadi035 11 ай бұрын

Use resin printing instead for strong and better quality prints. Also use some kind of locking system for impellers.

@qg786 11 ай бұрын

Try to saturate the printed parts in super glue or clear nail polish it helps solidify the prints and can achieve a smoother finish. 👌

@greatscottlab 11 ай бұрын

Thanks for the tip!

@DigBipper188 11 ай бұрын

Or - vapor polish some ABS :)

@thatbillguy5211 10 ай бұрын

I would highly recommend screwing the impeler in place, either on the top or side of the shaft. I believe it is necessary for any fan system to function correctly.

@maazshahid8920 11 ай бұрын

You should consider making a closed impeller design. They are great for static pressure.

@george-broughton 8 ай бұрын

Some BLDC motors just have a nut on the end that you can use to ensure the prop doesn't walk off the shaft. Some are even reverse threaded such that when the motor spins, the screw tightens down on the part. You could also go for a keyed shaft to reduce rotational slippage.

@ivanurban2383 11 ай бұрын

Its always a good day when you upload 😊😊😊😊

@greatscottlab 11 ай бұрын

Happy to hear that!

@alanmcguinn 11 ай бұрын

Great work. Vapor polishing would improve the smoothness of your prints and should provide some level of performance gain as the airflow over the blades should be smoother. You're probably losing a lot of efficiency to airflow past the clearances between the impeller and the housing. Perhaps SLA printing would be a better option, as it's higher resolution and it also produces smoother surfaces.

@BrokenLifeCycle 11 ай бұрын

Have you considered finding a motor with a threaded shaft and using embedded nuts in the impeller to connect it? When spinning in the correct direction, it will self-tighten itself to the shaft.

@ignispurgatorius5297 11 ай бұрын

Out of curiosity, a question to our mechanical engineers: How much does the surface finish affect the outcome in such a system? The printing looked quite rough tbh.

@shriramvenu 11 ай бұрын

not much i think. You're trying to generate a huge negative pressure, you don't need turbulent free airflow for that.

@DanDan-fu6sd 3 ай бұрын

I respect your effort and persistence.

@martyb3783 11 ай бұрын

Great video! You win some, you lose some. You always learn! Well done.

@WarkWarbly 11 ай бұрын

Just a heads up PCBWay does polymer SLS printing. Maybe they'd sponsor a V2/MK2 of the 3D printed impeller.

@greatscottlab 11 ай бұрын

JLCPCB does that too ;-)

@WarkWarbly 11 ай бұрын

@@greatscottlab Ya know, I might be wrong and it's actually JLpcb. I'm not sure now, I'm gonna ask the almighty google 🤣😂🤣 Edit: it's both : )

@SmileyFace01 11 ай бұрын

@kylekirby6424 11 ай бұрын

Do NOT purchase a Dyson. They are pretty and have great suction, but that's about where their benefits end. They get clogged up super easily and the plastic is super brittle. Mine was under warranty and they said I can't get it fixed because they don't have the parts for it. WTF??

@greatscottlab 11 ай бұрын

That....sucks. Thanks for the feedback :-)

@kylekirby6424 11 ай бұрын

Yeah, you try vacuuming up a bunch of cocoa cereal with a Dyson cordless and it'll choke. The hole that goes into the debris chamber is so tiny.

@plixplux 11 ай бұрын

@@kylekirby6424 That's what she said?

@kylekirby6424 11 ай бұрын

@@plixplux 😂

@electronic7979 11 ай бұрын

simply perfect project

@SkylineBNR34 10 ай бұрын

You just need a longer shaft so you can thread a nut or stopper on the end. That's how turbos keep their impellers on, or even some sort of C-clip would work.

@samuelkemp4557 11 ай бұрын

I'd be so curious to see the work/math behind impeller and housing design. It is such a mystery to me, and the resources online aren't too great.

@VorpalForceField 10 ай бұрын

I believe the cap on top of the fins, on the original, was to increase static pressure at lower rpm's .. also static pressure increases with multiple stages. People often emulate automotive turbos without taking into account the facts. They have very tight tolerances, and operate at extreme rpm's, some at over 100,000 rpm. At those speeds and pressures, the chamber itself becomes the cap on top of the fins. The cap on the fins will leverage the lower rpm window for your materials of choice, and those often used for mass produced products.

@__-fm5qv 11 ай бұрын

I guess one way to have the turbine stay on the shaft is if the sucking end of it was pointed towards the motor, that way it would only pull itself more securely on. That being said making something like that work from an airflow perspective and work within the packaging confines of the original vacuum would be extremely difficult.

@mikect05 10 ай бұрын

The way you say "Awesome" is AWESOME!

@mdewcool 11 ай бұрын

U can etch a dimple on one side of the motor shaft and add a security screw to keep it in place so it doesn't fall off. Belt pulleys use it like that to keep them in place.

@JohnBarronII 11 ай бұрын

I think you can take it a bit further. I'm very familiar with RC motors and we never use a press fit gear as they'd come right off the shaft like you're seeing. A simple fix would be to integrate a 48p RC pinion right into the impeller. You'd need to add some gcode to pause the print so you can insert the gear directly into the part and then keep printing to seal it in. This will give you teeth on the gear to engage the impeller directly and a small hole in the side of the impeller will give you access to the pinion's set screw. The set screw in the pinion will lock the whole assembly onto the motor.

@nhchiu 11 ай бұрын

Hello Scott! Do you consider printing the impeller with other materials, for example ABS? Because in general the density of ABS filament is about 10% lower than PLA and PETG. Maybe saving a bit weight on the impeller can help the efficiency. Thanks!

@harrylenon9594 11 ай бұрын

Weight makes no difference once it's already spinning. Also more ductile plastics will deform at high rpm and rub on the outer housing

@johndough8115 11 ай бұрын

@@harrylenon9594Weight certainly DOES play a factor. Weight = LOAD. The more load, the harder the motor has to work. When the motor is capped at a set power limit.. it will reduce the overall RPMs with a heavier load. The load might also be amplified, as you move the vacuum around.. as the extra mass with create more vectoral forces.

@harrylenon9594 11 ай бұрын

@@johndough8115 no, if the load has the same friction with its surroundings, it will reach the same top speed. Acceleration will be higher with lower inertial load, but top speed will not change. At constant speed, weight plays no role in power draw.

@johndough8115 11 ай бұрын

@@harrylenon9594 There is a channel that makes Custom fan blade designs. Certain designs are heavier, use more blades...etc. They all spin at different RPMs, despite the exact same motor being used.

@harrylenon9594 11 ай бұрын

@@johndough8115 yes, different DESIGNS.... the design will determine the drag on the propeller while spinning, not the weight. If you did a test with two identical blades, only difference that one is heavier, you'd find the lighter blades spin up to max speed faster, but have the exact same top speed

@HO-cj3ut 7 ай бұрын

Vapor polishing would improve the smoothness of your prints and should provide some level of performance gain as the airflow over the blades should be smoother.

@1remski1 11 ай бұрын

Just an idea... use a small turbo. Match the current motor rpm to a compressor map of the turbo. Then use the comressor, then turbine and see how they both perform.

@cookieman876 6 ай бұрын

Impeller balance will play some role in negating performance at higher rpm’s. That being said I believe you’re on the right track, I figured you’d buy a metal turbo impeller and try that but I respect the commitment to designing your own!

@cerberes 11 ай бұрын

Nice effort, part 3 will entail installing a wall mount with 2 screws for your shiny new Dyson.

@fireworkfreak9649 10 ай бұрын

Wow Scott, watched your videos many years ago.. never ever did I thought to see the man behind the voice after all these years

@prestonlandolt 5 ай бұрын

This is the first video I’m watching of yours but I just wanted to say your intro was beautiful

@DreitTheDarkDragon 11 ай бұрын

Can't wait to hear your review of SPECIFIC BRAND vacuum cleaner, I plan to get one myself too.

@jakem6572 11 ай бұрын

Let me know if you're interested in more details -- but I've made a similar type of impeller (and propeller too) with 3D printing -- the best way to secure it (I found) was to use small brass inserts and insert them into the round bit in the middle (in-between the blades) to screw into the motor shaft. Since an iron won't fit in the small gap, I would screw in the head-less bolt into the insert, hold it with needle-nosed pliers, then heat it up with a blow torch - then pushing the insert into the plastic between the blades. I would then cut down one of those head-less bolts (forgot their name) so they wouldn't stick out and use an allen-key to tighten them on EITHER: 3 sides | OR on the top and bottom of the motor shaft for more even securing. And BOOM can run it as fast as you want and everything -- hope this helps :)

@user-pb4jg2dh4w 11 ай бұрын

No no no , you can't imagine how i love ur channel man

@demil3618 2 ай бұрын

These are the experiments I definately like!

@kautkascitadaks 11 ай бұрын

Good job, great video thanks

@ricardoumbelino2445 2 ай бұрын

Can't wait for part 3!

@AlexSouthwell 11 ай бұрын

Surface rough ness of the 3d printed parts will impact your pressure and airflow i believe, either smoothing out the pieces or printing in resin would help with that.

@rafacruz1281 11 ай бұрын

To handle more power you need to fix the impeler with something stronger like an extended axle from the motor with a nut for exemple

@Dganny24 11 ай бұрын

If you want, I design and work on these for a large turbomachery company (the big blue ones), and can offer you some pointers, both with how the impeller is attached, and why you are having such issues with static pressure

@zachb.6179 11 ай бұрын

i wonder if a resin printer would give a smoother finish to the impeller blades and if that would maybe help it pull air more efficiently

@norbertnagy5514 11 ай бұрын

Probably it will decrease the amount and strenght of the vortexes so i think yes. Maybe just a minimal amount

@alibro7512 11 ай бұрын

It should be fairly easy to use a die to thread the shaft. You can then incorporate a nut in the 3D printed impeller.

@maxawsometheguy2870 11 ай бұрын

Weird suggestion but what if you sand the impeller blades so that the air can slip better. Overall great vid!!

@s.sradon9782 11 ай бұрын

maybe by using ABS and vapour smoothing you could eek out a bit more performance by making the impeller/cage surfaces more aerodynamically efficient?

@philippwetter 11 ай бұрын

To make it have even more efficient and increased static pressure, a diffuser must be there in the motor housing

@mzs112000 11 ай бұрын

Perhaps with some post processing the FDM prints(sanding, smoothing and sealing), You might be able to get a few percent higher efficiency there. I recall rctestflights videos where he mentions a significant performance penalty with propellers and impellers that are FDM printed without post processing work being done.

@Panda-qv4np 11 ай бұрын

I would try printing it out of resin or sanding the fdm down for better results due to the airflow not being as optimized additional you could simulate the airflow in a cad software

@666neoselen 7 ай бұрын

the axis of the motor is smooth therefore it doesn't bite well into the plastic. also I see sometimes a bolt perpendicular to the axis, that prevents the axis from slipping from its position, translation AND rotation are blocked this way.

@barklet6110 11 ай бұрын

I would coat the impellers in something that fills in the gaps between the layers and/or sand the layers down (probably unfeasible with the gap between the blades)

@Adrian2140 11 ай бұрын

I hope you enjoy your brand new vacuum cleaner!

@alexanderbrusnikin3118 10 ай бұрын

You must work with the surface finish on the impeller and the housing. Surface roughness greatly affects flow attachment and its properties (Reynolds numbers, fluid dynamics, bla-bla-bla; you can easily find a lot of free articles). Long story short, surface smoothness is critical in such applications, and losses in the system scale exponentially with the speed of the blades.

@Drxxx 11 ай бұрын

Cool video, great channel ❤

@electronichome1153 11 ай бұрын

Great video again! Always something new and interesting even for us, the "older engineers"! One question - which tool do you use for your mechanical designs - FreeCad or another?

@emirhantekcanozu6959 11 ай бұрын

Probably fusion 360

@pauljefferies5837 10 ай бұрын

He uses Fusion 360, eg kzfaq.info/get/bejne/ZrZkhZxizdmxlmQ.html.

@Andrew-wb7wn 11 ай бұрын

heya, if you ever look for a nice vacuum that doesn't cost as much as the dysons, you could try some of the xiaomi ones, they are actually surprisingly good

@greatscottlab 11 ай бұрын

Thanks for the tip

@pancudowny 11 ай бұрын

Ever look at the shaft ends of a turbocharger? They use lock-nuts on them for a reason, and they use impellers designed much like yours... only more radical in some cases.

@JimFeig 11 ай бұрын

The original had the enclosure on the impeller because its almost impossible to get it to always fit tightly.

@vonscherfarms925 10 ай бұрын

With a bigger impeller it needs to spin faster I order to perform similar. Also the layer lines are holding you back. Try a vapor smoothed ABS print

@clusterstage 11 ай бұрын

Hi greatscott, have you gotten your hands on iron-nitride motors yet? was curious to see what you come up with those.

@Kitzkrieg 8 ай бұрын

30 year home repair contractor here, and I use the exact extractors in the video without any problem. You need to apply a lot of force on the drill, and go really slow- allowing the bit to bite.

@janosadelsberger 11 ай бұрын

I bet SLA prints work much better, also an air flow simulation could help to evaluate your designs.

@that_weird_vtuber 11 ай бұрын

If you sand a rought patch on the motor shaft and then put the glue in the bottom of the impeller before pushing it on it will handle alot more speed before the glue fails

@vahagnmelikyan2906 10 ай бұрын

You can print a bolt hole from the side of propeller, and bolt another filament bolt .That might hold it

@thecon_quererarbitraryname6286 11 ай бұрын

A pin through the rotation shaft interlocked with the impeller would solve your problems I guess.

@codybaker1255 2 ай бұрын

there should be a distinct eye in the impeller, and quite long blades for this. if you end up with a smaller eye, and more surface area on the blades then you should be able to have a lower static pressure, meaning more suction, therefore having a potentially better vacuum.

@void_walker2304 11 ай бұрын

have you thought about using slots on the motor shaft and secure the impeller with a screw?

@philipoosthuizen 10 ай бұрын

You use an open impeller design, which causes recirculation flow around the impeller blades, lowering the efficiency. Try using a shrouded impeller and reduce the clearance around the impeller and the shroud.

@Lucas_sGarage 11 ай бұрын

Get a prop adapter for the motor, or a motor with a thicker shaft, it will give you more surface area for it

@Zenefor 11 ай бұрын

have you tried to get rid of the lower half of the blades(blend them in the middle) and at the lower part area to create a cone like shape to redirect airflow.

@EsaKarjalainen 11 ай бұрын

Have you tried printing a 1:1 copy of the original design? I wonder if matters such as surface finish on the blades affect the airflow?

@therealswarvey 10 ай бұрын

I'd file a small flat section on the motor shaft and use a grub screw to secure the impeller in place.

@ameliabuns4058 11 ай бұрын

You could create a boost button that you can press for temporary higher wattage

@miigon9117 11 ай бұрын

These two videos just reminds me again how hard and complicated fluid dynamic is, and paying the price for geniuses to do it right is well worth it for my dumb mind.

@ilijazafirov4192 3 ай бұрын

You could also always modify the top of the rotor shaft for mounting

@TorgeirFredriksen 10 ай бұрын

Which material and nozzle size did you use for printing the impeller? Smaller nozzle (like .2mm) would probably make a smoother part with less friction, Polished metal even better. Very cool test btw. As other commenters mention of course Bosch/Dyson engineers will get a better result. Imo. it all matters how close one may get by experiments at home..

@Gamezone-sd3er 11 ай бұрын

Well if you can design a turbine that is covered from outside just like comercial one static pressure will increase 😅. And it's not important to build High pitch blade it will create to much force on edge which will push the blade against enclosure. Try to keep the blade close to the lower it will significantly increase airflow because of lower drag on edge of blades😅. I hope this will improve your vaccum cleaner in pt 3

@McTroyd 10 ай бұрын

I wonder if the FDM printing is causing some issues in strength. Spinning that fast with that much airflow, the blades must be flexing somewhat. Barring injection mold (which I assume Bosch used), maybe a resin printer could make a difference?

@nicolaschampagne8988 11 ай бұрын

at this point, you need to concider metal insert in the plastic and press fit on the shaft of the motor. nice video keep it up :)

@DigBipper188 11 ай бұрын

Or at least a brass collar that holds two grub screws 180* apart from each other, the grub screws interface with both the impeller and the shaft of the motor to hopefully act as an anchor point to prevent the impeller flying off the shaft.

@Z-Ack 11 ай бұрын

You could have used a set screw and a motor with a shaft that has a flat on it to counter the impeller slip.. glue never holds…. And the tolerances between impeller and compressor housing has to be very tight for that style to work.. is why most vacuums use that flat style..

@sdaverede 11 ай бұрын

I was about to give this a try myself, thanks for the warning I'll not be able to achieve it!

@jttech44 11 ай бұрын

At the speeds you're seeing, running unfinished FDM prints is really holding you back. You need to sand all of your layer lines so they are smooth, and you need to hand clearance the rotor with the housing (likely by printing the housing a little undersize and sanding it to fit, then ramping power until it rubs, then clearancing some more. Steps need to be done in that order to ensure performance. Or just print it with a resin printer. You'd still need some balancing and clearancing, but, it's going to be way less work overall. From there, it's just about optimizing your rotor design, which is probably close to fine as-is.

@josephmoloney6925 11 ай бұрын

It seems that compared to the original it is very hard to create the sort of print you need especially with all of the clearance issues, would an resin printer make any sense? Lastly you have made amazing progress on getting close to your goal but these designs will go extremely well for the people looking for a vaccume cleaner that is not actuallly replacing the original one.