3D-printed double helical gear pump/water pump/hydraulic pump *watertight*

Recently saw a video of Boston Dynamics it's Atlas robot doing all kind of awesome stuff and learned that the robots were fully hydraulic. I was wondering if it would be possible to build a fully 3D-printable hydraulic system that's watertight and can be used for robotics. This double helical gear pump is the first component of the fully 3D-printable hydraulic system.
Note: The pump is watertight when using the 3D-printed lid with seal and seal tensioner. at some point in the video you can see me using a laser cut plexi lid, this one is only used for demo reasons, doesn't have a seal and so obviously leaks.
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Timestamps:
00:00 Intro
00:08 Mechanical design
00:25 Manufacturing
00:57 Assembly
03:21 Initial testing
04:13 Revision
04:36 Plexiglass lid
05:32 Outro
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STL and Fusion 360 source files can be found here: bbprojects.technology/collect...
More info, schematics, parts list, etc... can be found here: bbprojects.technology/blogs/p...
My PayPal: paypal.me/BrockenBrian
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Tools used:
PLA filament: www.banggood.com/Creality-3D-...
FLsun Super Racer: www.banggood.com/custlink/GGK...
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Music credit:
Outro song: Sustainable Dignity by Catalyst Belgium
Link to the video: • CATALYST - Sustainable...
Link to their channel: / @catalystbelgium2626 Their website: catalystbelgium.com/
For use and licensing of this song, please contact Catalyst Belgium.
Song: Joakim Karud - Classic (Vlog No Copyright Music)
Music provided by Vlog No Copyright Music.
Video Link: • Joakim Karud - Classic...
Longing by Joakim Karud / joakimkarud
Music promoted by Audio Library • Video

[@JKTCGMV13]

I just learned a new way to put gears on shafts...

[@yunusyunus4460]

P

[@parus5052]

Not the best option. Some moment pins may try to escape. It will block gears.

[@pfdk8066]

@@parus5052 Give me best option i need it

[@vgbhg9540]

@@pfdk8066 Make a notch in the shaft

[@Mulengr0]

My 3D printed gears have yet to turn out with clean enough tolerance to use as a pump. You are an inspiration sir.

[@bradlybryant4897]

If you add an 'o' ring groove just in from the teeth on the top and bottom of the pump gears you can seal the pressure from escaping over the top and bottom of the gears. Should wear fine on the clear acrylic.

[@hamidrezakhalili6070]

This type of pump can not transfer a large volume of water, but it can produce water at high pressure

[@jakegarrett8109]

Very cool, looks almost identical to some I had played with designing back in school (I was using 608 skateboard bearings for the gears, which works well except for water they will eventually corrode, but would be excellent for oil in a hydraulic system). Best part is you incorporated the cheap $5 2212 brushless motors every hobbyist has instead of the Bosch motor I had used, and I'm pretty sure yours is working better than mine did!

[@jansvasta2146]

I can't quite imagine how you were using 608 bearings for the gears. Did you cut teeth into the outside of the outer race or did it work with the bearings being unmodified? How was it assembled? Im curious, thanks :D

[@jakegarrett8109]

@@jansvasta2146 you could do it a couple of ways. Originally mine started off as a roots pump and had 4 external bearings plus herringbone synchronizing gears. You can put the gears recessed into the pump body (lid and base to support the shaft glued** to the gear), or for more compact the idle gear can have a 22mm shaft size hole and press fit the 608 bearing directly into that gear. **Instead of glue my shaft had an indexing T to transfer torque to the gear (easier disassembly compared to glue and no wait time), used printed shaft so the motor driven side I could have a recess for Lego shaft so it could flex in case of vibrations and motor side I made shaft to Lego shaft adaptor.

[@driftsdragsdrives4938]

sir the cheapest i can find the motors is $11 what website do you get off? i support them!

[@jakegarrett8109]

@@driftsdragsdrives4938 For most of mine I got them years ago on Ebay (just search "2212 brushless motor," or if you want a specific speed you can also search up 2212 930kv or 1000kv or 1400kv or 2200kv are the common speeds for that motor). You can also get similar motors on Banggood (they sell a lot of motors for airplanes and quadcopters as well as any other part you might need). You might be finding them bundled with an ESC at that price, which you will also need unless you already have an ESC. Then I also recommend a "servo tester" to send it the input speed (these are about $2), unless you are using an Arduino or similar to control its speed another way. It will end up being about $10 to $12 for the motor and needed electronics plus battery or other power source (like an old computer power supply, or car battery).

[@driftsdragsdrives4938]

@@jakegarrett8109 thank you very much my friend!

[@XYZAidan]

Great work, really clever design!

[@jn-husch]

Very cool design! Sealing off the shaft with a compression-gasket was a great idea. This seems to work very well in keeping the water in and the air out.

[@stopdusty420]

This is very similar to a Roots supercharger used on race cars! Great stuff!!

[@youradvertisehere]

Very nice and thoughtful design.

[@SonGoku-rl9qf]

Beautiful!

[@999999999omar]

Really professional design.

[@YooProjects]

Very interesting project. Thanks for sharing 🙏

[@sermadreda399]

Great video,thank you fore sharing

[@johnsmith-oy9kx]

This pump is so cute !

[@vikrammoorthy2679]

Saw your post on FB. This pump is brilliant!

[@BrianBrocken]

Thanks man, appreciated 🙏

[@mensb1936]

awesome, pleasant tunes

[@kilovolt2494]

I would add a support for the top end of the motor shaft. You can see it’s vibrating, which is wear and tear.

[@rizalardiansyah4486]

I'd also add more reduction although I don't really know whether it will improve anything anyway

[@joserolandsancheromero4440]

Está excelente, maravilloso ⭐⭐⭐⭐⭐

[@inlywang8157]

Great work

[@YueBeifong]

very clean. great work!

[@BrianBrocken]

Thanks man 👍

[@danieldeincognito3579]

Really cool! Congrats from spain!

[@wolfieperrinaybara9333]

How small do you think this could scale down? how big? and do you think maybe printing the gears in say nylon would reduce noise/wear?

[@francoenkayak]

What water pressure pulls? Do you have another video of the output end?

[@bryang1227]

There is just one other thing ,overlooked - the inlet and outlet should be doubled up to attain a bigger flow rate.

[@vitaliyvasylak3493]

3d printing is 👏👍

[@RUMPshit]

You are so talented and your channel is a treasure. Can't wait to see the next one

[@Lucas_sGarage]

I been trying to design something similar, but I was using simpler gears, i think, that I'm gonna try double helicall gears now

[@arshadinamdar4034]

Nice last end 🤔👍🏻

[@Creative_Electronics]

Wel echt weel een topvideo Bryan! ;-)

[@stefanguiton]

Cool!

[@Fabio.Gasparri]

Congrats! Excellent work! How does this type of pumps perform compared to centrifugal pumps (with similar size, motors ) in terms of flow/pressure?

[@BrianBrocken]

Thanks man! I was gonna write you a complete explanation but found this webpage that answers your question perfectly: www.kral-usa.com/blog/positive-displacement-pump-versus-centrifugal-pump/

[@Fabio.Gasparri]

@@BrianBrocken Thanks so much!

[@dinghaopan8684]

Cool stuff buddy. How's your unit's noise level compared to when you use cylindrical/spur gears instead ?

[@akselwilliamdanenbarger7969]

Cool whaterpump.

[@MrCrankyface]

Really nice! I printed a similar design ages ago but lost interest and never assembled it, looks like I really should give it a try! In the last little video it seems it has developed a little leak, is this just because of the transparent lid or what?

[@BrianBrocken]

Yes in the last part of the video i used a plexiglass lid for demo purposes and this lid doesn’t have a seal so the fluid comes out through the driveshaft.

[@ModernSurvivalists]

@@BrianBrocken Love the design. Nice work! I am guessing the plexiglass lid wasn't intended for actual use - but if so you could probably 3d-print a seal similar to the first cover that glues onto the plexiglass below the gear, where you can't see thru the plexiglass anyways.

[@padmalayarawal3091]

Amazing work. Would love know which software do you use to record such a high quality screen recording of Fusion 360

[@BrianBrocken]

Thanks man, I’m using OBS for all my screen recordings.

[@padmalayarawal3091]

@@BrianBrocken Thanks buddy.

[@bucksnortbumblefuk6872]

Not a lot of ppl know oil or fluid flows on the outside wall of gear pumps.

[@davidkreutz6990]

Love the Video, and I have a question. Is there a specific reason you didn't use the double helical gears above as well? With the 3D printer, they shouldn't be more difficult to build, especially since you already have to print two for the pump, but they sholud run much smoother and quieter than the normal gears. I´d love to learn more about it.

[@BrianBrocken]

Only reason I used regular spur gears on top is for ease of assembly. Spur gears can be slid on the shafts into each other, this is a bit harder with double helical gears.

[@davidkreutz6990]

@@BrianBrocken That makes sense, thanks for the fast response.

[@petermoffat5667]

Hi Brian can you please put up a link for the esc that you used most aircraft ones don't have a reverse. Thanks

[@BrianBrocken]

Hello Peter, the esc I used for this project didn't have a reverse function either, you only need 1 direction.I used this motor and ESC set: www.banggood.com/custlink/Dm3EknIjAK

[@retsetman9698]

Neat and easy to assembling. 😀👍Wondering did you test flow rate?

[@BrianBrocken]

Thanks man 😁, good point, will do some testing on the flow rate and will publish them later 👍

[@Deluge4000]

@@BrianBrocken Flow rate would be good. Interested to know the flow rate at various RPMs.

[@egeelcin]

Mate how can you find an o ring for your project did you design it that way or ..?

[@BrianBrocken]

The seals are printed with TPU (rubber) filament, can be seen at 00:30.

[@KashifJavedForex]

flow per minute?

[@steinlone5454]

I know this video is a bit old, but I didn't know the atlas robot was hydrolic powered? I thought it was servo motors. How is it so quiet and quick?

[@toordog1753]

You can definitely tell a nonengineer in these projects. Definitely great file for this, nice assembly.

[@572089]

try making a DDC pump next!

[@qztronic]

I've seen similar build from other channel but the quality of the build is just stupid!, leaks everywhere, bad suction power. The design in yours are by far the best I've seen!! also involved many attention to detail like the gasket seal, shaft inserts and stuffs. bravo!!

[@Jandodev]

tpu gas-kit is genius

[@TheRainHarvester]

How does the red lid not leak (as opposed to the plexiglass lid)?

[@BrianBrocken]

The 3d-printed lid has a compression gasket (can be seen at 02:10) the plexiglass lid just has a hole.

[@kewintaylor7056]

Should show how strong the water jet is...

[@CLAUDIOSRC9529]

excellent edeia dear friend I liked it and subscribed

[@daleanderson1727]

Happy to be your new subscriber. Came to you via Nicholas Rehm's channel here.

[@BrianBrocken]

Thanks for the sub and the info 👍

[@stonebayrocker]

Very nice! 👌 Any plans in terms of the possible uses?

[@BrianBrocken]

The plan is to build a 3d-printable hydraulic system that can be used for robotics.

[@stonebayrocker]

@@BrianBrocken Great! are you planing on uploading som content on that as well? Would be interesting to tag along!

[@BrianBrocken]

Of course 😉👍

[@chiragjalade8028]

Which 3d priter do you use bruh

[@gfr2023]

I will put a braket to hold the shaft on gear side. If not you are forcing the motor bearings.

[@axeus1382]

Handsome, like, subscription, still would turboprop compressor print and test 👍👍👍

[@LetsPrintYT]

At least your's not leaking XD 👍

[@BrianBrocken]

For now with no load it isn’t, we will find it’s breaking point sooner than later 😜. Really liked your video, was a funny one 😆

[@BrianBrocken]

I’m starting to think the type of projects we like to make are exactly the same looking at mine and your videos 😆

[@vuralcansisman5722]

what is the program you use for modeling this excellent thing ?

[@BrianBrocken]

Autodesk Fusion 360

[@VeniceInventors]

Nice design and presentation! Wouldn't the motor be powerful enough to be connected directly to the shaft of the helical gear? It would reduce noise a lot and friction a little.

[@BrianBrocken]

Thanks, yes it might be possible, this just seemed the easiest way to integrate the motor with the design at the time as it already had a coupling to secure propellers.

[@VeniceInventors]

@@BrianBrocken Oh, I see, it's an RC plane motor :-) Admittedly putting the motor on top wouldn't look as nice. The best idea I can think of to make it both quieter and smaller would be to insert alternating magnets at the bottom of the helical gears and some flat coils underneath, effectively making your own mini axial motors, and the compression seal wouldn't be needed anymore as the gears could be completely sealed in. Could be a fun project to experiment with.

[@lamdo3003]

Imagine you used this for those Water Pipeline all across the world. And run those water factories by solar and wind.

[@user-fj8bl9id2z]

좋아요

[@leonardoandres236]

Disculpen mi ignorancia, se ve el video muy bueno sin embargo considero que se podrían mostrar ejemplos prácticos también. De todas formas un like igual

[@madtscientist8853]

Wow I could use that for my vacuum experience! Is it downloadeble?

[@BrianBrocken]

Files can be found here: bbprojects.technology/collections/stl-fusion-360-source-files/products/3d-printable-double-helical-gear-pump-water-pump-hydraulic-pump

[@orsoelectrons]

Nice sir...please some in my home

[@GLeAnimal]

Mantap bos ku semangat trus moga sukses selalu ya hadir menyimak bos ku

[@budwilliams7908]

Very nice...much better than others I've seen who rely on glue instead of gaskets... That being said...claiming it's water tight when I can see the water fling onto your motor...a bit strong of an ask. Very nice work though.

[@BrianBrocken]

Thanks man, when using the plexiglass lid there is no gasket used and the water escapes through the gap between shaft and hole, this is only used for demo purposes (also mentioned in the video). The 3D-printed lid has 2 gaskets, 1 surrounding the lid and a compression gasket to seal of the shaft. The pump with the 3D-printed lid and gaskets is 100% watertight.

[@leonardocosti7286]

Nice 🇮🇹🇮🇹

[@nguyendanh8490]

I need to buy it

[@_IRON_MAN_4_]

Неплохо )

[@josedelmontealmansa6259]

interesante pero creo se podría mejorar.

[@RFi731]

haha cavitation go brrrr kidding, i like this.

[@tejbansal7691]

I want this...

[@netralstudio5085]

I can buy this

[@przemysawzawada3254]

Is it food safe? :D

[@BrianBrocken]

Lol 😂

[@lilhotdog7011]

Holy shit a 3d oriented pump that doesn’t leak…. Well I’ll be damned

[@bullfrogtv4706]

I want to buy your shredder

[@saimon6783]

I think the water comes out contaminated with white grease

[@makewithmegma]

🔥💕👍

[@nowshadali28]

Hame caise milega

[@BrokenLifeCycle]

Now make a pressure washer, I guess?

[@youtubevn9834]

hello l vietnam hi😁

[@amperemam5713]

Too bad I can't do anything with hydraulic oil

[@eminkurtoglu8374]

😃🇹🇷🇹🇷

[@stormglaive]

다 새는데...

[@BrianBrocken]

At 05:14 yes it's leaking because the plexiglass lid doesn't have a seal. The 3D-printed lid at 03:50 does have a seal and is watertight.

[@ameerhliaqath435]

LEAH RAHA

[@mrhussain1336]

-GG_

[@yanarceo6606]

Did you mada motor

[@ayganotomasyon1109]

sucks air . Gives bubble outlet

[@BrianBrocken]

At 05:14 yes because the plexiglass lid doesn't have a seal. The 3D-printed lid at 03:50 does have a seal and is watertight.

[@kaanitan]

bro pls 1 minute/litre

[@ronnijatirejo1332]

Who give Brian on subcribe to like please give water pump from indonesian

[@random_idRI]

I wan't please

[@BrianBrocken]

Files can be found here: bbprojects.technology/collections/stl-fusion-360-source-files/products/3d-printable-double-helical-gear-pump-water-pump-hydraulic-pump

[@BHARGAV_GAJJAR]

Cool if you are looking for a job call me up