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
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
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!
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
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 .
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
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.
@@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
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!
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.
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!
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!
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!
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
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!
*Major Hardware* another UA-camr 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!!!
@@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).
@@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 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 ...
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!
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.
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 ?
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.
3 роки тому+9
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.
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
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.
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.
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!
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
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.
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
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.
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.
@@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.?
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.
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
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.
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!
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) 👌
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.
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
LW-PLA is often better for water seals. It foams and fills gaps between layer lines that cause leaks. That may sound counter intuitive because some foams absorb water, but that's only open-cell foams. Closed-cell foams do not. It is more expensive but if you want a watertight seal it's really the right choice. Just keep in mind it gets a lot more stringing than regular PLA.
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 interesting. But wouldn't case design affect the performance. Lets say the casing had the outlet port radially from the center, instead of forcing the water through the curved path. Would the black impeller perform best again? Also would like to see the efficiency readings.
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!
You should do what the guy with the 3D printed computer fans does. Have your subscribers submit different impeller designs to you that you print out. And then rank them Edit: the channel is Major Hardware
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
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 .
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
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?
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!
Thanks
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.
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!
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
@@FilipeDGuedes Inverted results in 2nd test could point to battery running flat..
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
Not disclosing sponsor :angry:
Also images of the impellers on the chart would be nice for reference
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
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!
*Major Hardware* another UA-camr 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!!!
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! 🙂
it would be cool if the pump motor current is also measured.
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 ...
Great video! It would be interesting to see how each impeller operates under "pressure". As well as impeller design and its effects on cavitation.
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!
My guess for those new objects is that they are for testing archimedes screw designs. :)
Congratulations on getting your pump to prime.
was half in water level, or else it will not pump ..kkkk
Have you tried the Tesla turbine design?
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.
2:23 this is a VERY GERMAN impeller (if you know you know)
Dosent the leaking kinda ruin the pressure of the water
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 ?
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.
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.
i know leaking our tradition, but solving the leek also good :D
You'd try to "solve" a leafy vegetable? How'd that work?
What about classic centrifugal fan impeller design?
0
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.
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.
Would these designs work for hydraulic applications
Hi, great job!
Which nozzle you used for printing?
Thanks
may many more years come full of creativity and innovation, keep up the good work eh?
This is like the fan showdown channel. Nice!
Super cool
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.
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!
I love these vids. keep up the great work.
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
i love your content i always loved to work with water end pumps when i was a little child so appreciate it :D
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.
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
6:42
next time, make the water level higher than the pump itself, but the air is sucked 🙏😂👈
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
You gave us your best choice ! I hope a good next clip. Thank you so much!
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.
i wonder also the number of impeller blades will impact performance. i need to cfd a lot of this
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.?
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.
is it because the battery lost power? since you did the test in different order?
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
Beautiful & informative 🎥🔴 video 👌 .. The only thing i would suggest is priming the water pumps & then time the gallons litters per minutes or sec.
What 3d printer do you use?
You should try doing some FEM/FEA before printing out 18391839183929 different impellers, there’s also the Euler’s model for tubo machinery
Great testing 👍😀
I would recommend coloring the water if you do another video like this. Great video though.
Nice video. Thanks for your efforts.
I would also be interested in the power used by the pump with different impellers.
Maybe next time.
Were the pump primed before each test?
The gray one looks like a windmill of friendship and acceptance
Hai which one better for air?
why the timer start after 1kg? why the graphics says 4 liters, but the conteiner is 5 liters?
First Liter to start the flow. Push the air out and then starts the measuring
Wait, why did you use a battery?? Did you charge it up between tests?
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.
How can you get a proper result when your pump is leaking???
Your channel is growing into a fine science channel, keep at it.
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!
...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
U gotta try with shape of spoon hopefully spoon best than all of these
Thank you very much for your sharing, very nice demonstration :)
Thank you, i thing an important test for the engineer 👍🏽
I was rooting for the yellow and it won!
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) 👌
your cat looks verry fluffy.
I want to cuddle this fluffball.
which software do u use fort 3d designing (sorry for my english and nice video!)
Why did you start the timer 1/4 the way when the water was pumping
"Best result so far" 😂👍
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.
Very good. 👍
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
Great work sir!
where to buy such an impeller
next time measure power too... amp draw on motor.... also max pumping head how high the water will go streight up a pipe
Thats the difference between science.... point.
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.
LW-PLA is often better for water seals. It foams and fills gaps between layer lines that cause leaks. That may sound counter intuitive because some foams absorb water, but that's only open-cell foams. Closed-cell foams do not. It is more expensive but if you want a watertight seal it's really the right choice. Just keep in mind it gets a lot more stringing than regular PLA.
Red is clear winner in both the test performed equally
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).
The snail shell is what really does the pumping
Very good and very good explained ! You are very good teacher ,thank you . Comments from INDIA at Kolkata .
Very interesting. But wouldn't case design affect the performance. Lets say the casing had the outlet port radially from the center, instead of forcing the water through the curved path. Would the black impeller perform best again? Also would like to see the efficiency readings.
Thanks for the video.Excellent.
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)?
Pro tip. Shoot all the water out into another similar sized tub and you can just dump it back in instead of wasting a shit ton of water
You should do what the guy with the 3D printed computer fans does. Have your subscribers submit different impeller designs to you that you print out. And then rank them
Edit: the channel is Major Hardware
How can order the product please 😊
Estas checando cuanto aire pueden bombear?
Siempre tienes que purgar antes de empezar a bombear
did you test max pooling depth and how far it can push water up? nice video keep the good work