Weird Micro Hydro Turbine Generator from China - Or is it actually a Water Pump? 

Thank you ShiNY ^_^

Thank you so much Anders for giving me your technical expertise on this, you clearly know your stuff! I didn't realise that about the mechanical seal, makes sense now, so I should put it back in! Also very interesting about the vanes direction, that is good to know. I'd quite like to rig it up again actually and give it a longer test run. The only thing that concerns me maybe is the longevity, being a DC motor (or Dynamo in this application) I assume it's got a brushed Commutator, which at this RPM is going to wear fairly quickly? I wonder if a small three phase PMA might have been a longer living choice for it, but maybe I should just let it run as-is and so how long it work for.

@@TheAmazingAdventuresOfMiles Happy to help. The reason why the vanes confuse people is because the vanes and the housing of a centrifugal pump are carefully designed to work together and people don't realize it because they expect everything to be impulse. In a centrifugal pump the casing is often volute shaped(Not always though). A volute or the casing in a centrifugal pump has the same function as a nozzle would on a Turgo/Pelton runner although when utilized in a pump it can be viewed as a reverse nozzle. In a nutshell the casing will either speed up the fluid generating velocity or slow it down generating pressure depending on the direction of flow. The important bit here is that the volute/casing will have cutoffs. Impellers and more specifically the vanes are shaped according to these cutoffs and either the outer periphery of the casing or according to diffuser vanes(Single volute has 1, Twin scroll has 2. etc. Vaned diffuser casings could have as many as 20 or even more) The cut offs are either starting points or endpoints for the impellers to do their work. The best analogy for a centrifugal pump/reactance turbine's casing/impellers orientation is to imagine a trebuchet firing. Watch it in slow motion first forwards then backwards (when backwards imagining the trebuchet catching the payload and returning it to the firing position). Another way is to imagine an excavator with its arm being a vane on an impeller. When in turbine mode the arm stretches out puts the bucket down then pulls it inwards while curling the bucket to the point where the material can be scooped(at the cut off). The advantage of reactance turbines is that they are pumps and turbines very much like electric motors are also generators. Pelton, Turgo, Crossflow etc. are impulse and can only work as Turbines. About the brushed DC motor. I would not completely discount it, I mean it looks powerful. Brushed dc motors do have their uses and they don't need rectification. What I would look into If I was you would be to get one of those "no spindle drill" (Stupid name)assemblies of Ebay or aliexpress and some different size pullies and timing belts so you can test a runner/turbine with the same motor/generator, rather than the random crappy motor people will throw on to stuff to say "it can do 6kw" Like just get a low KV drone motor (like 90kv) those items should not set you back more than 50 pounds. My point is that there will be a certain amount of pressure available. The runner/turbine is one bit of the equation obviously the other one is the gearing and correlation with the generator assembly. Using belts and pullies is not something I would recommend, but it can be quite tricky to determine what generator will provide the optimal performance and it can help to have a modular design, rather than buying different motors and concluding they are bad. A belt and pulley system small scale will help you dial in lots of things. My guess is that ideally your runner should be sized to be doing about 2-3000 rpms (this is the rpms most pumps run at) and so you need a generator/motor that works at its best in this range according to the voltage you want either of the shelf or via gearing. I love your channel by the way, anything hydro, pump related is awesome so thank you!

Saya mendapat milik saya dari ebay, terdapat banyak lagi barangan serupa di sana pada masa ini

heheh I know right? Thanks for stopping by Joe, love your videos