hydraulic ram pump: design and manufacture home

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Christophe
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hydraulic ram pump: design and manufacture home




by Christophe » 28/04/08, 11:57

I plan to study the establishment of a small hydraulic ram to irrigate our few plants of tomato and strawberry ... We are lucky to have a stream that borders the property to do all the tests and necessary tests :) and, at least, a member of forums who has already done one 8)

Here is a picture of the creek in question:
Image

seen on gardening / tracking-of-the-growth-of-a-crop-of-the-garden-miscanthus-t5256.html

To begin, a few pages for the basics of operation: https://www.econologie.com/plans-realis ... draulique/

supplements: http://www.codeart.org/technique/eau/be ... que_fr.htm

Edit after a few weeks: here is the result of this step.

The pose


Operation:



ps: the reliability of the ram (defusing after 4 or 5 days) was obtained by drilling a small air intake hole (breather) of 1.5mm after the valve and before the reserve of air. A hole of 0.5mm or 1mm would probably suffice. This breather is COMPULSORY if you do not have a membrane at the air supply because the compressed air eventually dissolves in the water. It must therefore be renewed constantly.
Last edited by Christophe the 29 / 07 / 15, 12: 24, 3 edited once.
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Rabbit
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by Rabbit » 28/04/08, 12:40

I have made one (prototype) but it is not yet functional.
The elevation is 1 m, reached pressure 1.3 bars
The problem is that the frequency was too high.
she was irregular.
The causes could be:
-Pump not fixed
- Curved and non-rigid feed pipe (reinforced socarex)
-Reservoir buffer not enough big.

What annoys me the most is that I had to put a very large quantity
of steel washers on the valve. If I do not put the flap
do not reopen .On all sites visit and videos saw there was none
not so much. I do not understand the cause.

My project is to make a watercress and then a small family breeding of cure and finally to please the farmer who praises the acote meadow by giving to drink to his cows.

To get there you have to go up the water to 17 m on 700 m with the most
large flow possible : Cheesy: .
The denivellaton is 2.5 on 300 m.
I hope to get there this summer. I will make you a picture of my
prototype of the day.
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by Remundo » 28/04/08, 12:47

Regarding the yield, the "machine" efficiency of the ram seems to be around 70%.

Other link "Walton speaking"
http://pagesperso-orange.fr/energies-no ... h12-71.htm

On the other hand, others talk a lot about "30% efficiency" which in general corresponds to the fraction of the flow rate which rises, for example, on 100 L / s, we take 30L / s which will rise and we reject 70L / s. But yield is not a return of energy.

The following mathematical notations are taken from
http://www.codeart.org/technique/eau/be ... e_5_fr.htm

I think that the formula Q hx 0,7 = q (H + h) is based ...

The "water" yield is deduced from this by q / Q = h / (H + h) x 0,7 which amounts to 30 or 40% for the usual heights (H = 1 m, and h = 1 m, i.e. 2 m ascent) ...

To be confirmed in the field as we say : Idea:
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by Christophe » 28/04/08, 12:55

No Remundo, the yield is not 70% but less than 35% ...

I explained on the other subject what I thought of these 70% by looking at the power curve here:
https://www.econologie.com/forums/etrangete- ... 55-20.html

So I think the curve is much more realistic than this 70% (which comes out of the hat ... it may be the "internal" efficiency, a bit like we define the combustion efficiency in an engine that has " nothing to do "with" overall "performance). I think that these 70% actually represent the rate of "leakage": 30% of the water that passes through the ram is not "pumped" ... to be confirmed ...


As long as we are here again the 2 curves.

Sizing diagram:

Image

Power diagram (yield):

Image

It's just not clear which ram technology this corresponds to. I guess the "self-built" rams are slightly below the perf level ...
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by Christophe » 28/04/08, 12:59

Rabbit wrote:I hope to get there this summer. I will make you a photo of my prototype ds the day.


Cool we can compare with that of Tigger! And if necessary, I will come to see yours (and investment) since we are in the same region!

On the other hand your specifications are "a bit" more draconian than mine.

Uh and at the level of the law? Who says what in Wallonia?
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by Remundo » 28/04/08, 13:01

AH ... very nice curve because we can deduce the machine yield, especially ci this curve is result of experimental measurements...

She gives you the output compared to the water consumed according to H and h.

Let rdtmach the ram yield in power

We see for example 10% for 6 m = H and h = 1m

Which means that q / Q = 0,1 = 1 / (1 + 6) x rdtmach

DOnc rdtmach = 70% CQFD! :D

The subtlety is to clearly differentiate the output flow of the power output (which I called "rdtmach")
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by Christophe » 28/04/08, 14:38

Toutafé, I would say rather overall performance of the internal yield ...

In fact there is an abuse of language since the performance of the power diagram (from 8% to 35%) is not really a yield but a pumping ratio that does not take into account the potential energy.
It would therefore be a possible "adjustment" on the same machine with a fixed yield of 70% (all the yield lines give 70% so I suppose that it is a theoretical curve).

Finally, if I understand correctly?

Otherwise here is an interesting video of a homemade ram: https://www.econologie.com/un-belier-hyd ... -3796.html
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by denis » 28/04/08, 15:17

a mill connected to a conventional pump would do the trick, and for the hose it's not good! : Shock: it would not swell.
for pucks in addition, a stronger spring makes the same thing all, it is not visible at sight.
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White would not exist without the dark, but anyway!


http://maison-en-paille.blogspot.fr/
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by jonule » 28/04/08, 15:33

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by Christophe » 28/04/08, 15:45

Is it necessary to provide a tare adjustment for opening the flaps? Especially on the main flap?

Denis I think you're wrong, it would be much more complicated to build a mill than a ram ... I'm not talking about the risks in the event of a "flood" (the flow easily triples after a storm) ...
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