How To / DIY : Make a Centrifugal Pump, easy drafts and working principles

[schoorl200]

I wonder if the inlet hole has to be half of the lid. Half the propellor will only be putting pressure on the water the monent it disappears under the closed part of the lid

[AERO1779]

what did you use to create the drawings?

[bjorn512]

@AERO1779 I use autocad.

[2Lazy2ThinkOfSomthin]

I thought the music was my stomach for a second there. ^_^

[thisusernameisable]

this video makes me so  sleepy...good night

[ThePowerExcess]

How do you stop water from leaking from around the axis's holes?

[bjorn512]

@ThePowerExcess My pump is underwater so i have not leaks (really i cant see it).

[MrJhorseman]

Your bad english is

[hannina]

Music is distractive, it doesn't aid anything in this video.

The rest is good.

[bjorn512]

@hannina I think the next video i make will be a videoclip... I thought a this music will be better for concentration, quiet, not noisy...

[jesusd2610]

ok



[Bajesus042]

thumbs if you think this song remindes you of the sound you stomach makes when you drink to much water.

[guest2424]

mute video = win

[atommachine]

good idea..........Sublime soundsssssssssss;P

[ahmd1431]

O Jesus, son of Mary! Is thy Lord able to send down for us a table spread with food from heaven

[ppplll000999]

I have been trying to improve the efficiency of this kind of pump on low voltage 3V, low current use. What is your opinion on 1) curved blades 2) off-side placement of impaler, especially the theory on off-side design :)

[bjorn512]

@ppplll000999 1) curved blades increases a lot the eficiency of your pump, the perfect shape is a cycloid curve (i think), but get this shape is dificult 2) i dont know what is off-side placement of the impeler?

[ppplll000999]

@bjorn512 Off-side I mean the impeller is designed to be positioned not at dead centre , but closer to the rim  at one side & further from rim when near the outlet tube.

[bjorn512]

@ppplll000999 The best place to be positioned the axis of the impeller is in the center, the option you bring is inefficient. If you obtain better results with this design, it means that the rim is not fitted at maximum to the impeller and the water with higher presure, flows to the center of the impeller instead of going out of the pump.

[bjorn512]

Responder a este vídeo... With off-side design, you mean make a small model of your pump and use the results obtained in your model for a bigger pump, is correct? if you mean this, you must respect the rules of model design, scaled model, flow of water, if you are interested on it i can help you...

[ppplll000999]

@bjorn512 I now have a term for it, it is called ' Volute casing' with gradually dilated cross area as it go towards the exit. They said it provide better head( but lower flow). I am trying to maximize the 3.7V mini-pump for hobby submarines.

[bjorn512]

@ppplll000999 Yes, In the video I used the word "snail", "volute" is better. In a pump design for an industrial application, you use one commercial pump (with motor) and you modify its flow and pressure to you need (a comercial pump has a different pressure and flow that you need) then you have to select a commercial pump with maximum output at you flow-pressure point you need and then you have to modify your commercial pump reducing the rim diameter and slowing your motor speed.

[mikeyoung101]

That song hits hard.

[joshsyoung]

I'm looking to _integrate_ a compressor into a consumer application.  The compressor needs to compress air to 2-3 atm in under 30sec, quietly and inexpensively. A COTS compressor is too bulky and expensive so I'd like to design the compressor, application specific, integrated. Looking at a scroll pump out of ABS plastic. Perhaps a vane pump. And an engineer with relevant design experience.

[bjorn512]

@joshsyoung Im not a relevant design experience engineer. The job you are looking for is very dificult,it needs a very small tolerance manufacturing (not available for home jobs). An appropiate software for this is "pro engineer", you can simulate your pump. So you can look for a gears compressor (i dont know its name in english) maybe is quiet, small but moves a small volume of gas/air (that i think you need). I will ask more info about your needs and i will answer to you.

[joshsyoung]

Can a centrifugal pump with impeller be used to compress air.. say, up to 2-3 atm?

[bjorn512]

@joshsyoung I think it is very difficult, but something like a centrifugal pump is used to move air (kitchen extractor). Some vacuum cleaners (the ones with bag) uses a centrifugal pump. 2-3 atm is too high for a centrifugal pump. You can use a fridge compressor (the black motor in the down rear part of a fridge), it brings 3 or 4 atm.

[themoomon1]

fucker



[YUURIEDDIE]

Your vid is so fuckin boring you useless gay fuck

[timonix2]

so how well does this scale up? i have a 800watts engine i would want to build a pump of

[bjorn512]

@timonix2 a 800watts water pump may feed a home (3 meters high water jet). i suggest you to buy one arround 30 euro. But if you are testing your skills a 800w pump has 10cm diameter (more diameter brings you more pressure and less water) you can weld 2 or 4 blades in a iron dish.... About scale, in industry a centrifugal pump may has 2 meters diameter, i had seen. You must be very carefull in geometry and vibrations. It is a real engineer work

[077TrueSchoolTV]

is worked ?

[mohamystic]

circulation pumps don't give high heads or high discharge they only main use of them to circulate the flow

if u know coaling towers we put those pumps to help circulate the flow to the condenser

and their blade r radial blades so they give low efficiency too

[TheLaurencekid]

if you want a good pump get a circulation pump from a dishwasher they move so much water btw just saying because i felt like it :)

[binashraf]

how many rpm would you need on the motor to get it to suck up enough water??

[bjorn512]

It depends, but in this level of tecnology if you use a CC motor like me,you can increase the power of the pump and the water moved and rpm aplying¿? more tension to the pump, i use the bigger CC motor i found, and try various AC CC transformers, and the better were 12V the maxium i had.

[pititi52]

una pregunta el impulsor como lo has fabricado?

[bjorn512]

He pegado con locktite muy cuidadosamente y con mucha dificultad ,las laminillas al plastico redondo.Quizas haya un metodo mas sencillo...

[binashraf]

so the impeler (propellor thing?) will suck the water up even though its just spinning around in diff direction to the water??

[bjorn512]

Sorry, dont understand ithe pump uses the centrifugal force aplied to de water and increase the water presure, spining

[bjorn512]

yes!! because this pump works with presure , not speed of water (like a fan), then you can put in any direction the output pipe, so the water in direction changes loss the presure.

[abgsyahid]

tahnx alot dude

a very very useful video 2 thumps up

[bjorn512]

Wow, send me your videos!!!

[nakedblueeyeddemon]

thanks a lot bro!

nice video and guides!!

[bjorn512]

If you have another DIY problem i will help you, i like systems for watering my plants.

[larryalbacite123]

Great video, thanks