Testing Different Water Pump IMPELLERS - Which One PERFORMS THE BEST? [REMAKE]
This is a remake of one most popular video on this channel. ( • Testing 3D Printed Wat... ) Last time I tested four different impellers, but this time I will test six. Which one performs the best? We have to do some testing.
I MEASURE PERFORMANCE NOT EFFICIENCY!!!
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I work with water pumps so I feel obligated to point out that the reason the impellers had trouble starting up is because the reservoir inside the pump housing isn't filled with water all the way and has air in it. Water pumps are supposed to be "primed" before starting them which means filling the entire reservoir with water. Otherwise the impeller is trying to push air out when it's meant to push water. So this explains the difference in results after you did the second round
I agree the phenomenon is called priming :)
That’s what they said
there are self-priming designs though
The fact he doesn't start the counter from zero means priming has no influence on the result. What did influence the result was he ran two different tests and I don't think he realised that was what changed his results. One test was into a small bore pipe, this provided resistance to the pump output, the other test was free flow, an impeller for high flow often produces less pressure, his results show this perfectly. From his results you can see that a pump impeller needs to be designed for either of these two things
@@riba2233 yess!!
Today I learned that yellow color filament will give me the best performance for 3dp impeller
My dad always said "the red one runs fast". Looks he is wrong here.
It's a curved swastika
Lol
LoL 😂
The shape of the yellow seems a bit German
The strait blade impellers are high volume low head designs, the curved blades are lower volume higher head designs. That is why pump performance is graphed as a curve and prefers to operate within a specific duty cycle between open flow and deadhead (blocked discharge). You can simulate feet of head pressure (psi×2.31=) by throttling the discharge with a valve and monitoring psi with a gauge. Motor load must be figured into your pump's performance as well. Great video and happy engineering!
👏 Yes that is the engineering approach
This isn't a positive displacement pump so it has to be below the water line to function best. Also it would be good to measure the head of each design with just a tall pipe and marking how far it can push water up. Good video though
I also thought about it...it can be a great idea
Yeah, I was gonna say something like this too. The pumps didn't get equal opportunity because they weren't all primed fast enough (if at all). Also, the curved pumps should have an advantage of higher pressure (or "head", to use the same vocabulary as the comment above) but lower flow, however, only flow is measured in this video. Efficiency is also pretty important in pumps, so I would like to see that tested if this video gets done again.
This is why I have a love hate relationship with "lite" testing videos. Sometimes its nice to just watch someone mess about without having spreadsheets everywhere, complex math etc..... But on the other end, I tend to find I leave the videos feeling dissatisfied because there are notable flaws in the testing that is going to skew results. it can be interesting as long as you take it with a pound of salt lol
Correct, good observation. With different impeller designs there is also flow rate Vs maximum dynamic pressure or head to consider - ie one design might pump more water at a given head but another might pump more at a higher head pressure.
Funny, but thats first what i think of must be video about lol
Being no engineer, I learned that 1) Some designs need priming before use or they choke on air for ages (but perform well) and 2) some designs are FAR better at self priming than others (but don't perform as well). I'm interested in knowing why, but that would likely involve some slow motion footage and possibly an animation per impeller. Cool stuff!
Keep in mind that pump efficiency depends on motor power too, you should measure motor current and voltage during each impeller test. An impeller that moves water a little slower but consumes much less power is more efficient. Keep up the good work!
It would be nice to have this kind of data but he did mention the he was testing for performance, not efficiency
ya also need stable power supply going to the pump ,as the battery with naturally discharge over time .
Were can I buy dot
Were can I buy that
You would have totally different results if the pumo was set on the bottom of the reservoir, gravity would prime the pump quickly
He thankfully gave the impellers time to prime themselves in the second test.
Yes he compensated that by giving time for the impeller to self-prime. Good suggestion, although unrealistic, removes this parameter out of the measurement. Plz see my individual comment on this aspect.
The airfoil on the black impeller is travelling in reverse. That fix should see major improvements.
I thought red and green were reversed as well. Maybe my eyes
I'm very glad that you did both high pressure low volume with the hose fill to 5L and high volume low pressure with pumping straight out. Very interesting the difference in results! Great video!
Wow was the previous installment of this really uploaded a year ago? Wow how time flies…I remember watching it like it was yesterday! I’m glad you came back to run this experiment again!
Great video! It would be interesting to see how each impeller operates under "pressure". As well as impeller design and its effects on cavitation.
The 1st test with the longer tube for resistance and the 2nd test which was more of an open flow gave me plenty of data to judge pressure vs flow. Thank you!
Mechanical engineer here, different shapes of impeller can have different performance curves (perform differently at different levels of back pressure) ideally each propeller should be tested at three different levels of back pressure or restriction in your nozzle and then all those points should be plotted and a curve can be fitted the compared against each other so that the best impeller can be chosen based on application. This would explain the different performance in the two different tests as one test had a hose with a high restriction and one test had a nozzle with low restriction. Anyway great work!
Yellow and grey impellers looks like they were design by glorius german engineering xD
By glorious, you mean failed losers that were GLORIOUSLY eradicated 76 years ago.
@@3dPrintingMillennial he is joking hahhahahahaha
@@lore1786 I sure hope so. Lots of neo NAZIS running around now.
@@3dPrintingMillennial ohh yes all germans are neo nazis... you're right... and mr. trump is the best president sorry WAS the best for ALL Americans... You're so right
@@darkness1943 are you special ed? Where did I say or imply all Germans are NAZIS?
An idea to make better seals is to put "grooves" into the border of your prints: make a few layers of valleys and peaks. This increases the surface area of sealing. Nice video!
or he could cut out a gasket in silicone. 3dprinted tpu gaskets will never hold up.
Why the quotes? Wouldn't they be _actual_ grooves?
Use RTV silicone like a true pump. You do have to wait hours between each run. But Project Farm would definitely use a non leaking pump. Aim high, gain high!
As a first action, it would have actually been a good idea to seal the whole lid against the body. Watching closely one notices, that at the outlet there is no seal. No wonder this is where most of the leakage occurs.
You can get rubber or silicone 3D printer filament and use it to print a gasket, then you print a gasket groove into the two parts that are sealing. This is how real manufacturing is done
Not disclosing sponsor :angry: Also images of the impellers on the chart would be nice for reference
Congratulations on getting your pump to prime.
was half in water level, or else it will not pump ..kkkk
Next time i suggest using a tub to catch the water from the impellers so you dont waste water and it is easyer to refill.
@@HelloKittyFanMan. impeler* The propelers that are in an enclosed box or turbine i think are called impellers
@@uniqueusernane8204: What are "impeler" and "propeler" according to you? Oh, then you said "impelLer"? Because if you meant "impeller," then no, it's not a propeller. But yeah, impellers are used in this kind of pump. So if that's what you meant in your main post, then you'll want to edit your comment for future readers (it takes very little work).
@@HelloKittyFanMan. yes i meant impeler i will fix it
@@uniqueusernane8204: Good, even though you still said "impeler" here, you corrected that to "impeller" up there. Now I've deleted my old reply because it doesn't apply anymore, since you did the edit! 🙂
I love these vids. keep up the great work.
may many more years come full of creativity and innovation, keep up the good work eh?
*Major Hardware* another KZheadr has same kind of content but he does with PC fans... I really love your videos and make more designs and probably even make a page to submit viewer submitted impellers, print and test them!!!
Nice video. Thanks for your efforts. I would also be interested in the power used by the pump with different impellers. Maybe next time.
I was just amazed by the purity of the experiment... and incomparable embodiment of details... and the attention to the sealing of the motor axis was especially amused ...
My guess for those new objects is that they are for testing archimedes screw designs. :)
You gave us your best choice ! I hope a good next clip. Thank you so much!
it would be cool if the pump motor current is also measured.
i love your content i always loved to work with water end pumps when i was a little child so appreciate it :D
i know leaking our tradition, but solving the leek also good :D
You'd try to "solve" a leafy vegetable? How'd that work?
We use the blue design (albeit with 6 to 8 vanes) with our solder pumps for electronics manufacturing. I wonder how well these other shapes would do and how the weight of the liquid would affect the result.
I wonder if the battery voltage had some part to play in this. It's possible the battery was charged between runs or that the draw wasn't enough between runs to make a difference though I'm not exactly sure. It would be interesting to do a similar test but instead using a different power source like a psu or something.
Thanks you so much, so helpful!!
Great work sir!
Appreciate the effort here ! Some more suggestions in addition to all the experienced folks here 1) all the leaks need to fixed to have more accurate results 2) why is the inlet pipe at a slant in the bucket ? It should continue to start from the bottom, but it should be horizontal all the way till the impeller. Even this isn't ideal as the water weight/pressure will reduce as the tub gets emptied. So I'd think we need a larger/wider tub so that height drop changes very little. 3) what improvement can we get if the inlet to the impeller isn't perpendicular rather inline with the impeller thrust ?
very helpful, thank you
Thanks for the video.Excellent.
Thank you very much for your sharing, very nice demonstration :)
Hello, interesting test, I recommend that you set the pump lower than the deepest point of the container with water so that the pump is always filled with water and there is no air in it. A design like the one used for turbochargers would be interesting, and take a slow-motion recording (some cell phones can do that) to test the cavitation effect.
I feel like the green was doing better initially before it siphoned air back during the output change from open to the hose. Same with Black I wonder what results would be if you allowed the pump to be fully primed without air. (You can see air bubbles traveling through the hose, showing a massive inefficiency) 👌
Bro add valve on the intake and prime the engine with water removing all the air before actually measing the performance. What you did at the end was actually pretty good idea to sort the problem. The video is amazing. Keep it up!
5:00 For the gray frame cover, try to reinforce it with a middle 90 degrees web to avoid bends also try to find a way to add one more screw to the top at the middle. good luck with the rest of the video
Now have a vertical clear tube that goes straight up a few meters and see which pump can move water the highest. You may find that the fastest at moving water in these tests may not be the best one in that situation.
Awesome video, I need to make one to help me drain the pool when it's time to pack it up. Also I had to pee twice from the water sound lol
As far as the seals go, this type of pump leaks a lot. We use them at work, they require expensive, delicate fiber gaskets with a large amount of clamping force and a separate multi stage seal for the motor shaft that uses centripetal force and a separate seal fluid to turn back any liquid that leaks out the motor shaft
That's because tesla pumps are too powerful for themselves. The problem isnt really the pump design the problem is its power.
Great testing 👍😀
very good idea to do such testing, I was expecting there will be some result related to power consumed for each design. But still good idea.
Super cool
The weak point is at 3:26, that o-ring will be grinded to dust after a few hours, so the lifetime is very short. But very nice video. Look for sealings they use in dish washers and washingmachines
This would be really interesting if you measured the pump curve of each impeller and compare
Thank you, i thing an important test for the engineer 👍🏽
I have an idea (which may already be a thing). Variable pitch/angle impeller, i bet like a regular Propeller, they have different effectiveness at different speeds and i wonder if changing the blade angle could improve its performance
The gray one looks like a windmill of friendship and acceptance
Red is clear winner in both the test performed equally
Excellent video, well made and explained, thanks ... Please note, never use grease or any secondary form of substance on your gaskets, use gaskets only... You get leaks and will cause gaskets to perish in time, put a metal cross bar over the two top bolts to get extra pressure on that leaking top straight... Nice one... Respect to you... Thom in Scotland.
your cat looks verry fluffy. I want to cuddle this fluffball.
Love the videos, just wanted to say that having all tests run simultaneously on-screen may help viewer retention/reduce fast forwards. Unfortunately that would make your videos shorter, and I also know next to nothing about running a successful yt channel. Thanks again for quality content and solid methods tho
6:42 next time, make the water level higher than the pump itself, but the air is sucked 🙏😂👈
I like it I think it’s a cool video a cool to learn how different designs effects the effectiveness also I have a suggestion if you do this again when you are starting the pump and the water begins to shoot out I think you should have a bucket or something there to catch the water that way it will be easier to refill the water box
This is like the fan showdown channel. Nice!
seems like these in an R/C boat would perform differently because being submerged outlet/inlet. i think the high flow full trash/ sediment design might work better than the high pressure low sediment water only . because duck weed or sand or whatever but then nozzles definitely change for highest top speed vs highest acceleration torque
Well, this comparison video is stupid, the pumps are not well primed, there are leaks everywhere, and the battery will loose its juice the more you use it. I would prefer to use dc power supply that provides stable voltage and high current
yeah, probably wasnt a coincidence that when the order of testing was reversed so was the pumps placement. battery running down, doh.
exactly testing non self priming pumps without priming them...
also the pipe was most likely limiting the flow cos it was a small pipe
07 Anggoro I agree with you this fellow DOESN'T know a thing about making water pumps and how to keep them from leaking which skews the data results gathered and by NOT placing the gasket all the way around the bolt on section or even protecting the motor from water leaking into it will also ruin the results on a side note just look at water pumps made for pools the have an external AC induction motor that's usually 1/3 to a full 1 horse power to pump the water around the pool.
I watched the video because his accent was crazy funny. Now reading the comments I laugh again, LOL. He starts of the video with " All water pumps leak", and you fact nazis are commenting on priming and lost volts, LOL , Enjoy life .
I would recommend coloring the water if you do another video like this. Great video though.
Great man
i assume so, but can this be used as a vacuum cleaner as well? i'm having a hard time finding impeller design guidelines for vacuum cleaner impellers
Nice video! This was a flow pump performance (no pressure). You should also compare pressure using a long tall transparent hose and see which impeler produces the tallest water column. Cheers from Argentina.
Hey. I love your videos. Like other comments say, these pumps are not self priming. So need to be below water supply level.
Beautiful & informative 🎥🔴 video 👌 .. The only thing i would suggest is priming the water pumps & then time the gallons litters per minutes or sec.
Pretty clear why the pump leaked. That gasket didn't cover the top portion where water was spewing. I probably would've used an oring type gasket and some grease or gasket maker to ensure a good seal. Another test would be to test mixture of best prime/speed. Without proper sealing they're all invalid IMO.
i wonder also the number of impeller blades will impact performance. i need to cfd a lot of this
"Best result so far" 😂👍
Both of these were volume tests. I want to see a pure pressure test. Pump the water into a vertical pipe and mark how high the water level gets with each impeller.
Hey I really liked your video I have been looking for a video like this with 3D and pillars for a long time and I really like how you changed your test up at the end it made it a lot more consistent. Great work can't wait to see more from you
What about classic centrifugal fan impeller design?
0
Try testing a more aggressive design similar to a car tubine impeller! :D but very similar to the best performing one to see if you can squeeze out any more performance out of it!
What's a "tubine" (according to you)?
I really enjoy your video, few suggestions: Place the pump bellow the plastic tank that way it will be prime and results will be more reliable. Perform at least three test with each design. Place more screws to avoid leaks Thanks it was entertaining
Exelente ensayo Amigo
The impeller is strictly calculated by mathematical formulas. And its shape is not arbitrary; it is verified based on calculations. This is done by students at any technical institute during course design and then defend their project before the engineering commission. My course work was called - Calculation of the main parameters and the impeller of a centrifugal pump. Approximately 3 pages of mathematical formulas.
Yeah.. But then there is the volute geometry.. The inlet and outlet position. as well as the cut water position with respect to the impeller.. You could also consider some 3D impellers. Or impellers that have angled blades. Sweet video!
You should try doing some FEM/FEA before printing out 18391839183929 different impellers, there’s also the Euler’s model for tubo machinery
Dosent the leaking kinda ruin the pressure of the water
Genial. Gracias.
Greetings, 1st I wanna say to keep up great work there and great content. I am like 30+ years experienced mechanic and technician and my profession is hydraulics and pneumatic systems and equipment. I do lots of other jobs but that one is, lets say, main profession :D It would be great to see differences between static and working pressures of each impeller type and how much is the load on the electric motor for each impeller as well for each state. Few suggestions though... Try to make an groove on the top spot of the pump casing (where is the leak) and put one peace of bridge on the case, and make new seal in one piece that is enclosed all around. Also, try to fill the pump 100% with water before starting the test. It is called Priming, most of new pumps have that feature automatically soon as you open the intake valve, but rest of them need to be primed, older pumps. Or, you can make yourself Automatic priming system if you want to keep the pump above water level. It is easy to make as well, a self-priming centrifugal pump has two phases of operation: priming mode and pumping mode. In its priming mode, the pump essentially acts as a liquid-ring pump. The rotating impeller generates a vacuum at the impeller's 'eye' which draws air into the pump from the suction line. One more thing, to be able to fully test the impeller shapes, you will need to print the impeller with an EYE in the center of impeller which is going inside the intake pipe, it is the most common shape that prevents bad water suction, directs the water flow in right direction inside the pump and impeller itself and have huge impact on pump performance as well. (in the video, just have a notice how water behave inside the pump case and how much unnecessary turbulence are made inside impeller area, those are because bad impeller and case design) Anyway, it is great to see the differences regardless the imperfections keep up great content
for pressured water pumping, the blue one works well. For an open water pumping, the yellow one works the best.. So this test shows what is best for every kind of situation.
If you do another test I would like to see the static pressure differences between each design. I'm curious to see if maybe that would be why the black is the common design when others seem to out perform it in other aspects.
If you wanna see static pressure, the system in that case will have to be blocked from water flow with pump running, otherwise, when you have an open system like this, pressure is called working pressure and it is usually lower by 1/5th to 1/3rd of the static pressure, depending on impeller shape and purpose. Working pressure is usually lower by 1/5th to 1/3rd of the static pressure, it depends of impeller shape and accumulator (if it is present in system) Oh, and if he does make the static pressure test, he definitely need to seal all the leaks on to pump housing as well ;) Leaks on he's pump is easily fixed, he needs to cover the top part of the cover, make an groove on the housing and put the plastic bridge which will make contact with the rubber seal on that spot, otherwise it will always leak from that point. (I don't know why he left that spot without seal at all but anyway).
Very good. 👍
What if you made a pump that sticks to the wall of a glass tank and is driven through the other side via magnetic coupling?
I love your videos!
The snail shell is what really does the pumping
Were the pump primed before each test?
thanks for the tip with the filament going to order from them now
Dios lo bendiga excelente ilustración lo bueno de esto es poder meditar y así desarrollar un buen proyecto bendiciones 👍
...this is a dry pump test but how will the results change if the pumps are primed before the test as that is how most sump style pumps are started
Estas checando cuanto aire pueden bombear? Siempre tienes que purgar antes de empezar a bombear
Clock wise and anti clock rotation also Can change results
Great video!! But: You should test some positive arrange of the blades all the designs but the first (wich is 0) are negative. Also, waterpump has two big problems, first one is that the higher part of the tube is the waterpump, wich could make air enter to the system. So you should add a gooseneck at the end. Second problem is that the waterpump should be oriented horizontally to avoid some 9.8ms2 forces.. I will be waiting for the third one.
Awesome
and you know what, you should make a o-ring track seal for the housing, think that would work way better. And yeah, as other has stated, better test to make the pump not needing to suck water up into the housing. Maybe print a container on top of the hosing with a valve on the outlet of the pumphouse
Based on your outflow, your curves pointing towards the center of the incoming flow might not be the best ones. The straight ones don't matter so much but for the curved ones you may get different results if you flip the blade ends 180? Great as always, even if it leaks.
I've always been surprised that the design is as it is, but it works better than the one that intuitively looks like it would 'scoop' better. The correct curve flings the water to the outside better which is what a centrifugal pump needs.
If the blades were mirrored (flipped 180% via zed axis) it would create pressure in the direction of the current inlet
@@anotherknowitall6039 Got it now. I was thinking specifically the black one to be more chunky in the middle and run to an XY point at the edge in a reverse teardrop I guess, because of how poorly it did in the second test. should create a more forceful fling maybe? But if it would create back pressure then it wouldn't be a good option to do that. Thank you both!
If you did a mirror copy of that one, and also switched the inlet and outlet it should move more faster. If your wanting to just experiment with blade shape/design, try with and without a tophat, dimples (like a goofball has) both with and without blades,in your current pump configuration shorter stair step blades should perform well I'd think "around the perimeter would out perform one that spirals from the center" multiple disks stacked with equal spacing (look at a Tesla turbine) however with such a heavy fluid it probably wouldn't create but minimum pressure working best as a linier flow mech. You might try semicircles in the
Bladeless areas or multiple as blades and or triangles at the bottoms open but I do know that tolerances play a huge role in performance I'd suggest printing them ever so slightly too big to fit and sanding them back to where they just barely Miss microns, if you reverse the flow direction on your design making taller blades near the center would have another huge impact as well but that also entails changing the direction of the blade curve. I personally would like to see you find some curve that encompasses the golden ratio or an exponent or a fraction to the 3rd 6th 9th there of.?
Very good and very good explained ! You are very good teacher ,thank you . Comments from INDIA at Kolkata .
is it because the battery lost power? since you did the test in different order?
Does painting yellow also work?? (Btw, Good experiment. Show the impeller in a graph so that I don't need to skip back to see which impeller you are referring to. Also, you can use a bench supply so we can track ampere it will tell more about how hard is it working )