Free Floating Piston Film (mpeg).mpg

[@3dw3dw]

Fantastic!

[@londonalicante]

No. The air replaces the rider rings that support the weight of the piston. That is why there are only jets on the bottom of the hollow piston. Compression rings are still needed to keep the air in, but these are subject to an axial force which does not cause so much wear as the weight of the piston. What I don't get is why they don't mount the piston vertically.... I guess it is down to the size of the equipment.

[@heathhunter5306]

yes, in fluid dynamics, the air is the lubricant. that is the whole point of this design, and the reason for intake port roughing. i digress. it makes this a non-contact design. bearings, are, aside form wet-sump/oil fed fixed bearing applications, are contact bearings, like ball, toroidal, roller/t-roller bearings, bearing the load on a contact surface. the smallest degree exists on roller bearings, due to alignment control, but they all have what is known as "scrubbing" oil is imperative.

[@kartoffelbrey9817]

We need more background music! Louder!

[@heathhunter5306]

mtpfe, or any sort of extra compounding can be utilized to implement "start-up lube" duration. I'm sure what they are, or should be working on is a more intricate labyrinth seal design , tailored to the viscosity of air.

[@skipstalforce]

so lets see the air replaces the oil that lubricates the rings that keeps in the air that floats the piston negating the need for oil for a bearing surface like a ring which you have included to keep in the air.

[@3dw3dw]

In some processes, lube may be considered a contaminant. If the product is medical grade oxygen what type of lube would you like to breathe/smell. We must be careful about using products that may off gas VOCs into products for human consumption.

[@pr191148]

Tolle Idee...

[@mycosys]

did you actually read what i was responding to?

[@baklazanivanovich7566]

only steam mashine with lubrication and close circle - thats all.

[@donmaguire]

Hi, what drives the free piston?

[@3dw3dw]

The piston connects to the crosshead. The crosshead connects to the connecting rod. The connecting rod connects to the crankshaft (more commonly known as the eccentric in compressors). The crankshaft is connected to whatever prime move if most efficient for your application. If you are compressing natural gas it may be a natural gas ICE. It could be an electric motor in other applications or even a steam turbine.

[@mycosys]

hmmm, believe people with degrees and research funding, or a guy who cant even spell what he is talking about and is likely blaming poor design on an uninvolved element, or basing his opinion on a very early design. hmmmm

[@mycosys]

exactly - you took something completely out of context and hence your response is way out of whack - In essence we agree, but you are too arrogant (apparently) to admit you were responding out of context.