ฝัง
- เผยแพร่เมื่อ 21 ก.ย. 2024
- This is my 3rd attempt at making a compressed air engine. This time I've implemented a sort-of exhaust valve, improved the strength of the engine and increased the running duration!
There's still more I need to do to improve this engine, I still don't think that it is strong enough, so I may use PETG for some of the parts next time to see if this helps.
Also it would probably be good to see the engine actually power something....so let me know any ideas you have in the comments below!
If you want to save the holy dollars, buy metal bearing, open the protection thingy and remove the greace inside (leave them in diesel I found that's what works best) then use silicon base lubricant. Cheap and wayyyyy less friction than with the greace, and fine for small load and not dirty environment. Nice video, keep on the good work
That sounds like a good idea! I'm tempted to make some hybrid 3d printed bearings too, 3d print the shell and use metal ball bearings inside
@@kurzey8532 hehehe good old longboarder trick, and for the diesel, that's how I maintain my kite buggy bearings, only difference would be that I fill them back with marine greace. Would be a good idea and interesting to watch. It's a shame that your channel doesn't have more visibility, keep grinding man!
honestly the bearings are under such little load that if you are using a skateboard bearing or something similar size you can get away with leaving it unlubricated which makes it have less friction. I have a modified Tom Stanton motor I have been abusing for the past while with a nearly unlubricated ultra ultra cheap single skateboard bearing and with it running at 100psi hitting over 4k rpm and a total run time of over 10 minutes it is still like brand new. The engine also has a 10 inch high angle prop on it so it is hitting 4k rpm with a large load.
@@garbageman3992 bro just dropped a new version.
Go check him out!
Clever use of the pushrod to create an "exhaust valve", always interested when a new engine video drops
Thanks Adam appreciate it!
I too
You, my friend have just earned another subscription, how do you only have 750 subscribers?!
Appreciate the support buddy ♥
Just posting here to boost engagement and all that
Keep doing what you're doing man, this is great, and the production + the content is really top notch. Love it.
Thanks pal, the algorithm approves 👍🤣
@@kurzey8532 that's.... Why I'm here
Use a resin printer and instead of a bottle use a CO2 cartridge. Nice video btw!
Currently got nowhere to out a resin printer 😭 but I want one! Trying to work out how I can use a CO2 cartridge, problem is you've got ~800psi, so need to step it down somehow, good suggestion though!
@@kurzey8532 what about something like this? im sure you can find a cheaper one.
www.ebay.com/i/303785357729?mkevt=1&siteid=1&mkcid=2&mkrid=21572-161791-658771-9&source_name=google&mktype=pla_ssc&campaignid=12961468953&groupid=121250410949&targeted=pla-1248581038030&MT_ID=&adpos=&device=c&googleloc=9067708&itemid=303785357729&merchantid=116792603&geo_id=80&gclid=Cj0KCQjw16KFBhCgARIsALB0g8JD6TPjwJPXY4kE7WHt1xH5xL_61636q5KyXk9NRhCrcj50TtoopDsaAqkaEALw_wcB
@@dimitriskalpakidis8610 good find! That looks like it would do the job! I will investigate, thank you!
@@kurzey8532 Are you interested on a summer project im planing to do ? Its a different type of engine. add me on insta if you are @dimitris_kalpakidis
Man im loving this series
the video quality is actually really great, I hope you keep making videos, you def deserve more attention!
Thanks appreciate that!
To boost the engine performance, make a pushrod open a inlet port a bit earlier than piston reaches top dead center.
On that way air will, to say it like that,, punch"the piston with bigger force making the engine has more power.
I'm pretty sure it does open just before TDC, can't remember exactly though
@@kurzey8532 When coming next video?
@@onlinehelper374 I don't know, I'm like 1/4 of the way through making one, I have more pressing matters atm like getting my masters degree lol 🤣
@@kurzey8532 Your channel reached 1K subscribers, now you can monetize your videos ☺️❤️
my man be making better engines than Tom Staton. I am currently working on recreating this engine because I want to have one
edit: I may have also sacrificed my finger trying to remove my print from the bed ...
Worthy sacrifice
I modified a Tom Stanton v3 air motor for maximum performance by adding bigger exhaust ports, 30% bigger inlet valve, and lots of fine tuning for the best seals but it still wasn't hitting as high rpm at the same pressure (when you had the large inlet valve) so the exhaust port on top rather than at bdt seems really efficient. Good job!
Thanks man!! If you're using a propellor that could be adding resistance which might slow it down?
@@kurzey8532 well yeah I did have a large prop but I did a test where I only had a flywheel and it still wasn't reaching the same rpm
your valve idea is great ...thank you for this kind of invention
Looks sick thanks for uploading 👍
Another class video bud, keep up the good work I can see your channel going places 👏
Thanks buddy!
Loving these videos!
The v2 engine rly sounded like the minigun on the A-10 warthog
Definitely get some kind of air psi/pressure regulator (not just a simple valve) to control the air going into the engine it will last much longer duration at lower rpm
You could theoretically pump a small metal tank up to a really high psi and regulate it down to 20 psi and get a very very long runtime off it!
note most 2 liter soda bottles can handle just under 100 psi on average. from what ive seen.
Yeah I agree this would definitely help.
I was thinking of getting a mini scuba tank because they can hold a lot of pressure but I'm pretty sure you need special pumps to get up to the high pressure
Hey instead of raising the infill percentage, try increasing the wall count to improve airtightness.
Thanks!
yasss he back
♥
Gas handle, adjustable idle RPM, starter motor, more cylinders, bigger cylinders
Step 1 silicon cartridge to seal leaks or silicon glue. Because this is a 2 stroke engine, maybe the piston can also be the valve intaka and exhaust, i guess there is a lot of air leak at the valve with air going straight outside. Also, Nice build
Leaks still need some work, they're a pain!
Problem with having the intake on the piston is the valve timing, by design it's forced to open the intake before TDC so you waste some air "slowing down the piston" before any is used on the power stroke.
Having the exhaust on the piston would mean during the air intake some air would leak out of the exhaust port until the piston moved down far enough to close it, and I imagine you'd need some kind of spring to keep it closed, introducing more issues 🤣
If I've misunderstood you, my bad 🙄
But thanks for the comment!
@@kurzey8532Yes I see my suggestion will be a straight path either for leak. Perhaps an adjustable crank on the valve for optimal timing and a second valve for exhaust. One on the intake and one on the exhaust. Test a longer piston stroke. Maybe a pressure limiter before the intake valve so it has less effort and less potential leaking on phase transition. These are just though for this cool engine
This is 2 years late but it would be more efficient to reduce the amount of time the inlet spends open rather than restrict the diameter of the inlet. Both will make it run for longer but the restricted opening also effectively restricts the operating pressure of the engine. Whereas if the time is restricted instead of the inlet size you have an operating pressure closer to the bottle pressure and it gives more to expand in the cylinder and produce work.
Nice video and keep going
Awesome.
Wanna try to recycle some of the exhaust air with a turbine attached to the crankshaft? It would also benefit from any leaks from the exhaust port.
Might be tricky to utilise the air 💨 because the pushrod mechanism is kind of in the way, could work in principle though
Really cool bro, instead of using a pushrod system, what if you used a reservoir based valve system like the one tom stanton used? My newest engine was a 2.2cc cylinder with a 2cc reservoir. I used a square piston and I got a 11 second run at 40psi.
However if you wanted to keep with the pushrod system, what if you delayed the pushrod by 60* and decreased the travel? Then you would allow the air to flow in when the piston is already traveling downwards, and with the decreased pushrod travel, you'd let less air in the cylinder. Making it more efficient. But you'd get lower RPMs due to less air driving the piston.
Thanks bud, I'll have to check out your vid and see what you've done!
I could certainly do some tuning with the offset and travel to try and get it to be more efficient, I'll be looking into that for sure, there will also be a trade off for longer run time and power
Try replacing the push-rod part of the valve design with a ~2mm hardened wire (or a screw with threads sanded off/only a smooth shank part). You should be able to work to an even tighter tolerance and the area of leakage around the rod is smaller (thus of course, less air leaking out during intake).
With the way this engine works it may create an issue with exhausting the air if the pushrod slot is made too small so not sure if wire would work, using a sanded down screw or rod could work for sure, thanks for your thoughts!
Btw the optimal angle for the cam off the crank is 120°
I've used between 45-60 lagging behind the crank, so the valve opens just after TDC, wouldn't 120 make the valve open too late? I think we're probably using a different reference point though.
so i havent watched the video yet but i can already tell its gonna be good!
you now have one more subscriber
Thanks for the support bud ♥
Come everyone, he needs more subs!!!
Another great video 👍
You can also increase the wall count to something like 10 (It wont really be that high but it will make sure the part is printed with walls only). In my opinion this will pack the layers closer together than even 100% infill would
I dont know how well it would work but try putting a thin layer of epoxy or something similar to stop the air leaking threw the parts. It wont look pretty but it might help
Making things air tight is a pain 🤣 if it could help it might be worth a try
That's excellent! I would like to know the efficiency of your engine, but this might be difficult to measure (the power output is difficult to measure, not the power input). Especially the version with the little valve is more effective, because it allows the air to expand more inside of the chamber.
I would Love to see a Liquid rotary Air Engine. I can't even find a model on thinigverse so it's a bit more work but the Rotary engines are pretty interesting.
Do you mean the liquid piston engine?
You should use lubrecation to have less friction and it is more efficient because between zylinder wall and piston there isn´t escaping so much air
I did spray some silicone lubricant in, didn't make the cut tho lol, try and keep the build sections short, I may try and use graphite next time too see if that's any good!
@@kurzey8532 Ok, graphite should be really good for this application
For the algorithm!
Try using a regulator like what tom Stanton used in his diaphragm engine to get a longer run time and constant pressure
Yeah I'm sure this would help, Thanks!
You mean some kind of Carburetor? At beginning it is only tiny bit open, then with loosing Pressure in the Bootle it open more?
Please try to make a DC motor that uses bell shaped electromagnets
Every like helps restore sanity? Let's hope you don't get too many then, doing this sort of stuff requires you to be at least slightly insane.
True 🤣
Nice vid only 9:31 long would of been better if you made the video longer
Thanks pal! I may try some longer format videos in the future! Problem is it takes me ages to edit lol
How did you make that nice animation? I am beffuzzled
Thanks for noticing 🤣 they take a while to do lol, a mix of fusion 360 and after effects
Se serait super intéressant de mettre des aimants sur le volant moteur pour créer une micro génératrice pour recharger un téléphone par exemple, et on pomperait l air dans la bouteille de temps en temps
it may be too big or complex, but what if the pushrod cam was mounted on the crankshaft via a spiral spring? i think that would retard valve timing at higher pressures due to higher force on the pushrod and prevent air coming in too soon
Finding it hard to visualise what you mean :(
@@kurzey8532 Mounting the cam on the crankshaft in a way that it could move a few degrees independent of the crankshaft, with a spring to make it go back to its original position. at high pressure, the force on the pushrod would force the cam to move, retarding valve timing. sort of a spring-controlled VVT
Do it again but coupled with a turbine.. inlet air flows over a turbine before going into the intake :-)
triple expansion engine using disk valve and open cylinders with pressure in the crankcase operating on the underside of the piston not the cylinder to expand the piston for better sealing and no crank case pressure losses
why not make an engine using Atmospheric Air Pressure instead of compressed air, suction has immense power. at 15Lbs per square inch piston area and could lift a Melon or a pair of melons, as long as you are geared up properly.
as far as strength of prints go, generally more walls are considered better than more infill, unsure if this holds true for containing air, but here is a video explaining it th-cam.com/video/AmEaNAwFSfI/w-d-xo.html
Yes I've watched this video (or a similar one) I thought 2mm was pretty thick already, I could try higher I guess, I'll have to have a play around with the thickness and infill and see what works best, the parts just take so long to print 😓
Have you thought about using the piston to push the air valve 👀
Seems the offset is different from low rpm and high rpm... need something to increase the offset while speed changes.
Problem with this is the air inlet valve will always open before the piston reaches TDC, and then will only be open for a short period of time on the power stroke, unless you had a spring like tom Stanton used in his earlier engines
@@kurzey8532 unfinished thoughts about a 2 step arm when the middle facing to the piston, one side facing the air valve and the other side facing to an adjustment screw, to control how earlier the valve open before the tcd... well unfinished so I don’t have the 3d mold yet...
Is it possible to somehow limit the amount of air that gets released? Best if you could gradually regulate it
Using a pressure regulator to step down the pressure into the engine would do this, it's something I'm looking to incorporate
@@kurzey8532 Nice! I was already looking forward to the next video, but now ill do that even more
@Kurzey yo man please read and then suggest a good first printer for a beginner I wanna get into 3d printing however at the time of me acquiring my free 3d printer my flaw was being poor lol my pc was incapable of using the software as it was a dell optiplex 78 without a gpu and the 128 or 256 gb on board gpu wasn't guna cut it now ice discovered ways if making money from recycling e waste into precious metals I can now afford a printer and a good PC! I was running or tried to rather run an elegoo 2 spool something or other I had no screws that came with it(part if it being free lol) I just sourced my own and assembled it correctly and was successful in completing 3 test prints flawlessly.
What if the crankshaft was based on a long screw using the screw as a support? Im not sure how it would work, but it could work if the printed part was screwable on the screw
Do you mean using the screw as the connection to the flywheel? Or have I misunderstood
@@kurzey8532 the crankshaft experiences forces up and down in the middle. That might break it, but if the cranshaft was a screw, and the connections were 3d printed and screwed onto it (the screw is the core that way), it probably wouldnt break. I dont know how useful it is, im just brainstorming.
@@karyjas1 I believe this is pretty much what I did before, and it works for the most part, but you still have to be careful with print orientation as the sections where the screw threads into are the weak points and they can snap!
The weakest point for me is always the connection to the flywheel, need to sort this out somehow
@@kurzey8532 If it was a bolt, not a screw, you could have the flywheel attach to the head. All else i can think of is to increase the thickness of the entire crankshaft. There isnt very much you can do with a thin 3d print. If you want it to stay thin, you will need better material. Or plastic better suited for such purposes. Maybe some sort of combinations?
@@karyjas1 all very good points! I'm going to try PETG, see if that helps, or not might use some aluminium rod or as you mentioned a bolt.
Only reason the parts are thin is to fit in the bearing, so could just get a bigger bearing too to be honest
Also I wonder, if you ran this engine in reverse, would it act as an air compressor?
Funnily enough I was thinking about this the other day, if I strapped an electric motor to it, honestly I'm not sure
I dont think that crank assembly is the right shape for the amount of torque that youre getting on the rod. Theres too much pressure in your chamber for the size i think. That seems to be consistent across all 3 versions so far.
What do you think should be changed?
can you 3d print a 12v air compressor (piston type)?
6:29 - Warum sagt das Ding Ja - Ja -Ja, wenn eigentlich NEIN, NEIN, NEIN angesagt wäre ?
Why does the thing say Yea - Yea - Yea when it should be saying NO, NO, NO ?
i want a small c02 powered pneumatic engine to go on an rc plane
Hey bro, could you publicize the files so we could print ours as well?
Where can I find the stl files
Is there a reason the compressed air source looks like an IED?
How you know what an IED looks like in appearance lmao unless you did EOD or joking lol that comment backfired
Oh the plastic 2 liter bottle covered in ducktape haha I would like think sum1 with money for this shit could source a blood 40 dollar compressed air tank for a Paintball marker and then use that as a 68cu" on is cable of 3000 to 4500 psi and is light and about a bit smaller then his like 3rd world one pot crystal people recipe lol which also very much can become an IED before one is able to say breaking bad lol
Integza vz Kursey
Hey can you send the stl files please
What 3D printer u use
Can you please Provide us 3d models?
Watch the videos from Aliaksei Zholner TH-cam channel.He made a engines out of paper, but you maybe find solution for your engines
Paper? What a mad lad, I'll have to check that out
@@kurzey8532 are you found his channel?
WHAT CAD software is that?
Fusion 360
@@kurzey8532 Thanks
@@kurzey8532 i just had an idea of an engine how could I send you an image
@@kurzey8532 it s something unique i think
Reddit? Kur_zey is username