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Post a picture or two or three,....I'ld love to see your build. What is you pump pumping? Google searches found conflicting reports as to whether or not, brass is classified as a self lubricating metal, but when I Google, "brass bearings" I find lots of plain brass bearings are available for...

I uploaded that jpg file again; hopefully everyone can see it now.

There's another rather important principle governing fluid flow within a Tesla turbine which has yet to be discussed, that being what causes the fluid (steam, air, any gas) to flow, without turbulence, in an inward spiral pattern. Here's how I see it: Once the steam leaves the nozzle it's...

Made & assembled a few more parts. The shiny ball-head screws were purchased via AliExpress, 15 pcs for $5.38. The pistons were made from some 8mm brass stock I had left over and lying in my spare parts bin; the finish is pretty ugly, and I'm hoping the O-rings take up the slack to prevent...

I've had pretty good luck buying and using cheap, all-ceramic bearings, on eBay; the size I often use is 608 (8 ID x 22 OD x 7 W mm). This size is often advertised as an upgrade replacement for skate boards, which makes them easy to find and cheap. Most of these bearings I've received have...

I can relate,....when I moved from San Francisco to Thailand I waited for 3 long months for all my household goods, including all my hand tools and benchtop CNC mill, to arrive, then several more weeks for my crates to make it through Thai customs.

I started machining pieces about a week ago, just to see if I could make some of what I believed would be the more difficult parts for me to fabricate. So far, I'm on a roll, and most everything is working to plan. All the parts in the pic below are either brass or stainless. I like using...

I very much appreciate everyone's inputs, suggestions, analysis, and pointing out what you believe are my errors; you've all helped me reach the conclusion that the best technical solution is to use a different pump, one with more than two pistons. I'm opening a new thread under "A Work In...

I've decided to build from scratch a small 9-piston feed pump similar to this drawing: Design Goals: 3 LPM (Liters Per Minute) at greater than 600 psi 9 pistons with 8mm diameter Stroke of each piston: 0.26" Total displacement: 0.182 cubic inches (0.003 Liters) 1000 RPM Driven by a...

Yes, adding accelerometers to sense & measure vibration is a good idea, especially during the development phase. And you're right about the boiler making a fair bit of vibrations as the water first begins to boil, but it quiets down once the boiler is putting out a steady flow of steam. Move...

Hmmm, that might just work,...but I'm at least several weeks away from being able to test that theory. So, as they used to say on old radio shows, "stay tuned" :cool:

In a mono-tube (or water tube) boiler, at pressures of 4oo to 500 psi, the majority length of boiler tube will be incompressible liquid water,...only a relatively short length of boiler tube will be filled with steam. And since the steam will be at high pressure, I'm not very confident it will...

Thank you for your inputs; after re-thinking a bit, I can now see how pressure is, as you stated, nearly instantaneous, building rapidly as soon as the swash plate begins to push the piston and the valve plate rotates to open that piston's output. So, my graph shows only flow rate, not...

Question for the pump experts: Below is a graph of what I believe the Pressure out over time (or shaft rotation) of a 9 piston swash plate pump would look like. The GREEN lines show the pressure & flow rate of the 4 pistons which are actively supplying pressure and flow at any given time in...

The marking on the hose shows: 18 MPA 60 C. As the project progresses to having a hot well tank, I'll need to replace the pressure washer tubing. I do like your idea though,...a length of plastic or rubber tube should work to absorb at least some of the energy from those strong pulses :)

At the moment, I have no plans to gather that much data,...but that could change :)

I have doubts. The difference in mass/volume between water and air, and the difference between compressible vs incompressible flow are just too great.

My final design calls for a closed system, so I will be using condensers to recover & re-circulate the water. Using circulation pumps, temperature sensors, and another Arduino computer (digital microcontroller), I should be able to keep the condensed water at close to 100 C in the hot well...

I'm building a giant leaf blower :cool: The turbine output shaft will be coupled directly to a centrifugal air compressor, either a standard bladed design, or a Tesla pump, if it proves workable.

The current pressure washer pump has a single piston which moves back and forth within a cylinder. Pressurized water is collected from both cylinder ends, effectively giving this pump two cylinders. The swashplate axial design would have 9 cylinders, with each cylinder pushing out slightly...