safrole wrote:Here you go. Get out your wallet.
It probably doesn't have enough flow rate to do you any good, but maybe they can get you something more suitable, but I think the piston is the way you want to go. The diaphragm pumps seem to be lower pressure, but here is a link anyway.
You have piqued my interest. Are you inclined to share any more details on what you're doing? I'm especially interested if it has to do with your earlier post re: the gas/electric propulsion system.
Maybe a tiny 2-stroke glow motor with an electric motor to drive it? You're essentially using the fine machining and reed valves as a high-sealing pump.
KOEZE wrote:Maybe a tiny 2-stroke glow motor with an electric motor to drive it? You're essentially using the fine machining and reed valves as a high-sealing pump.
2 Stroke can't work. A 4 stroke may work. They have intake and outlet valves needed to build up pressure. A 2 stroke gets its air/fuel mixture from the oil pan.
But then you'll get about the same size as a car tire compressor.
You may want to consider a steam engine instead of lego as it doesn't rely on plastics (reducing max pressure). Also a pneumatic cylinder may do the trick. With these options friction and the heating of air being compressed may cause problems with the seals.
On the other hand. I don't know how much air you need but you could use a geared pump to pump fluid into a pressure vessel compressing the air in there. Use the air and pump out the fluid to allow new air in. This way seals and leakage are less important but you are restricted to the max pressure that can be supplied by such a pump and very little volume.
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