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Author Topic: Da Vinci water pump  (Read 1643 times)
polyphemus
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« on: March 21, 2016, 06:25:39 am »

A school with which I am associated asked me to design a pedal powered water pump. This is my first concept. I'm going to flesh it out with a model to see if it is at all practical.

Stay tuned.
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Polphemus Pomfret
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Caledonian
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the dragon's called Salmacis


« Reply #1 on: March 21, 2016, 10:06:29 am »

*stays tuned*
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Lancelot C Flange
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« Reply #2 on: March 21, 2016, 12:18:36 pm »

 have a look here.

http://www.mccurdyco.com/romanwlm.htm

Regards

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polyphemus
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« Reply #3 on: March 21, 2016, 02:51:46 pm »

That's it. Not at all over the top for a preschool...
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Hektor Plasm
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« Reply #4 on: March 21, 2016, 06:25:16 pm »

That's it. Not at all over the top for a preschool...

True. You could always make a big one...

 Grin

HP
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Maets
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« Reply #5 on: March 21, 2016, 07:07:06 pm »

Looking forward to seeing how this progresses.
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RJBowman
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« Reply #6 on: March 23, 2016, 02:28:09 pm »

You might want to put the mechanism at a slight angle so that the water pours into the trough and not onto the mechanism.
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polyphemus
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« Reply #7 on: March 23, 2016, 03:40:52 pm »

I think the cans placed on the chain at angles will accomplish that. I've seen an ancient example which angled pots in a similar fashion. And a characteristic of this tech seems to be a fair amount of spillage. 3d printed parts for the model are being prepared.
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polyphemus
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« Reply #8 on: March 25, 2016, 11:34:09 pm »

After some teething problems the first 3d printed wheels are being produced. (Hush, I know I could have cut them by hand faster!)
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Banfili
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« Reply #9 on: March 26, 2016, 12:51:10 pm »

Watching with interest - will you paint it brass or copper coloured?
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polyphemus
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« Reply #10 on: March 27, 2016, 12:26:31 am »


Successful bench test of gears

successful test of bucket chain
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SeVeNeVeS
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« Reply #11 on: March 27, 2016, 08:53:31 am »

I am liking this one, consider me tuned in and watching!
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polyphemus
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« Reply #12 on: March 29, 2016, 01:06:34 am »



The frame work begins to rise. Very preliminary tests have shown that directing the water at the top of the chain may be the hardest part. It may require a special bucket design which I was hoping to avoid.
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polyphemus
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« Reply #13 on: March 29, 2016, 11:18:28 pm »



The framework continued
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RJBowman
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« Reply #14 on: March 30, 2016, 02:20:53 am »

You're going to need one of these:
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polyphemus
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« Reply #15 on: April 02, 2016, 04:01:30 am »

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Prof Marvel
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« Reply #16 on: April 02, 2016, 07:00:48 am »

My word - this is really quite nice!
I am particuallry enchanted by the hexagonal "wheels" and linked boards as "chains"

this could prove to be quite a delightful device in a living room or resaurant, feeding a small waterfall.....

yhs
prof marvel
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Maets
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« Reply #17 on: April 02, 2016, 05:10:44 pm »

Coming along nicely.
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polyphemus
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« Reply #18 on: April 05, 2016, 04:46:10 am »



Brake installed to prevent filled buckets falling back when pressure is removed from drive wheel



Main wheels installed

Next a crank and the planning and installation of the sluice
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Caledonian
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the dragon's called Salmacis


« Reply #19 on: April 05, 2016, 12:39:44 pm »

this looks really nice
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polyphemus
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« Reply #20 on: April 11, 2016, 12:52:07 am »







Buckets and spillway added. A certain amount of fine tuning is going to be necessary to ensure it doesn't spill more than it transmits
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selectedgrub
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« Reply #21 on: April 12, 2016, 07:43:16 am »

This is turning out to be a fine contraption.
Very good sir, please continue.
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Banfili
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« Reply #22 on: April 12, 2016, 02:07:22 pm »

Ditto!
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wolfmanyoda
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« Reply #23 on: April 13, 2016, 12:52:58 am »

This is fantastic work, hand me some popcorn I'm not moving.
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polyphemus
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« Reply #24 on: April 16, 2016, 11:28:07 pm »


The latest state

The thing about doing models involving water is that it doesn't matter what scale you're using, water is always full scale. And a thimble full doesn't behave like a bucket full which doesn't behave like a barrel full. Which is a long prolog to saying that I had my first test with water and it didn't go well. Part of it was the scale, but even at full size I think the design of the buckets would have been problematical.

Redesigned bucket system.

It will now pour forward into a sluice


down another (unbuilt as yet)

and into a cistern


and back into the main tank.

This is all for the purposes of the model as demonstration piece. The school (remember the school?) for which I am designing this will divert the water in ways to be determined.
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