[glen_m_32]

Hi all,

I am after a motor and gearbox, the basic specs of are 12Vdc, 5nm or more of torque and must run on a car battery for half hour and must be as small as possible!

Does anyone know of any applications that a motor of this standard is used, or does anyone have any experience with this type of motor?

Thanks for all your help!

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I'm no motor expert but I've certainly seen wheelchair motors used in quite a lot of applications. I dunno if this'll do for you.

~Phil~

[Phil]

I'm no motor expert but I've certainly seen wheelchair motors used in quite a lot of applications. I dunno if this'll do for you.

~Phil~

[dsenette]

what's the intended application? (not a motor expert...but i've got sources for certain things)

[sari]

what's the intended application? (not a motor expert...but i've got sources for certain things)

There are factories that are run by monkeys - dsenette can call on his monkey friends to make things for him

[warriorscot]

Maybe im wrong i dont have one to hand to check but wouldnt the motor from something like an electric drill have a motor of a similar spec to what you want and should be fairly small although i dont know what kind of power output you could expect not having one handy.

[glen_m_32]

it is to turn a flywheel which will push/pull two opposed pistons to pump water up to a container 4m in the air!

i didn't think of a drill motor, they ar torquey!

thanks guys, anymore ideas would be fantastic!

[dsenette]

yeah...a hand drill (preferably corded) would probably offer enough torque...and would be easy to get your hands on for testing....also...the wheelchair motors are REALLY torqued...so those would work as well

[glen_m_32]

Do you know the specs of wheelchair motors? like sizes, wieghts and torque output?

thanks again!

[h_mike]

I am sure the size, power, etc. depends on the wheelchair, I don't think all wheelchair motors are the same. Anyways, you could probably "Google" up a standard wheelchair, and check the motor size, and see if its general motor for most wheelchairs, etc.

Edited by hayabusa_mike, 06 February 2007 - 09:10 AM.

[dsenette]

i'll do some research for you...i know most are either 12 or 24 V...not sure on the torgue

[warriorscot]

You know thats just the kind of stuff im doing now in my water resources course(part of my chemical engineering degree) whats it for? Backup water supply? or do you have poor supply and need something for peak periods?Or just for fun?

[glen_m_32]

Its kinda for fun, but i'm trying to help a small team of top enigneers to develop a pump for the developing world, so they can have technologies like us geeks enjoyBasically we are powering it with a 12V car battery and charged by solar power!

I have looked up the wheelchairs and tried to find a place to give me info, but not found anything as of yet, but i#''m still looking!

Thanks for everyones help!

[warriorscot]

Right so you are trying to develop cheap and reliable supply resevoirs. I assume its to provide some decent head to allow you to transport the water from water sources to population centres and provide adequate storage of course. Pretty interesting stuff my lecturer has done tonnes of work in the 3rd world building water resources its really interesting. I think a fairly large drill would work well they are very cheap the motors especially however i would just get the motor from an engineering supplier they will probably be cheaper for you but how are you looking to supply these to developing nations as plans they can use to build these themselves from local materials or from parts supplied from developed nation if so an engineering supplier is your best bet, ive got a book from Endat called process engineering, its an engineering compendium(for chemical engineers got it from my father now that im training as one along with some other stuff) and basically what it does is tell you what companies make particular parts you need so i would get a hold of that. I dont know what kind of engineers you are working with but a chemical engineer will know what it is and how to get it if he doesnt allready have one.

[glen_m_32]

i'm working with aerospace engineers, very bright people.

I have found a pump or http://www.rswww.com on number 400-466. it out puts 10.2Nm, abit pricey, but as this is a prototype i think it will do, if it goes into production i would source a cheaper option, but this is mainly to prove the theroy works!

[warriorscot]

Might want to consult some civil engineers or environmentally trained chemical engineers they build these things in the third world on a daily basis from small scale to large scale. A civil engineer could probably design from top to bottom for an exact location in a few hours, its what they do for a living they couldn't design a plane to save themselves but reservoirs they get taught from very early on. It wont really be a prototype since what you are doing isn't really new its actually fairly common.

You can find plenty other motor companies shop around see whats cheap http://www.tridenten...amp;man=trident looks good, http://www.endat.com...p;Submit=submit that's the page from the book i mentioned they have a list of a few companies that already make the kind of motors you need.

Is it for a particular area, you will find that especially in Africa in population centres water resources are surprisingly well developed(at least i was surprised) as they get most of there energy hydro electrically. In other areas you'll have particular factors like water minerals that need to take into account, for example Bangladesh water needs to be filtered for arsenic you will need to factor in filtration(you would probably need to do that anyway or your pump will seize if your water supply isn't clean).

Edited by warriorscot, 07 February 2007 - 12:19 PM.