Plans for making a hydraulic ram pump

Realization of a hydraulic ram (experimental but perfectly functional) by theUniversity of Orléans

A hydraulic ram is a pump that uses the energy of water to lift a certain amount of water much higher than the height of the initial stream.

It is a self-powered pump which pumps "free" about 30% of the water passing through it.

hydraulic ram scheme
assembly diagram, click to enlarge

The principle is simple and a ram is easily achievable through commercial plumbing parts.

More: hydraulic ram, the ecological pumping

Here is the presentation of a ram test bench made by a professor from the University of Orléans. You can chat with him on our forum dedicated to the manufacture of a hydraulic ram.

Overview and performance

A tank with a capacity of 10 liters is placed at the outlet of the lift column (5.20 m).

The measured time to fill the tank is 6 minutes, this measure does not take into account the system boot time.

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- Volume remaining in the "drop" tank: 72 liters
- Volume recovered 10 liters
- Volume lost 35 liters
- Efficiency: 10/35 = 28%

For an operating time of 1 100 liters time we recovered ...

hydraulic ram ball

hydraulic ram tank

Details on the implementation of the valve and the ram

One piece is to modify the brass strainer. A threaded rod with a double function is added: guide to the oscillation of the valve and adjustment of the automatic reopening time of the valve according to the mass that is applied to it (80 grams in the assembly presented here). This mass will obviously be clean for each assembly (pressure / flow…)

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parts of a hydraulic ram
Parts of a ram

realization of the valve
Realization of the ram valve: a slightly modified brass strainer.

Photos general assembly

hydraulic ram operation
assembled hydraulic ram and running

Presentation of the hydraulic ram principle
Video of a ram in operation
Monitoring of the study and realization of a hydraulic ram on the forums

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