Crank case

[Aviator168]

Hi,

Been running some stirling engines under 1Bar. If charging the engine to a higher pressure is desired, is it necessary to charge the crank case as well?

Thnx
Wai

[Ian S C]

Wai, the short answer is, yes. Ian S C

[Aviator168]

That will make it much more complicated. Oiling and Sealing the crank case is very big challenge. A double acting gamma type engine with two displacer cylinder would be easier to design and produce.

[Aviator168]

Wai, the short answer is, yes. Ian S C

Sorry that I have to bring this back. But what is the different between pressurizing the crank and just installing a spring (which is almost the same as using a heavy fly-wheel)?

[vile_fly]

Do you mean switching to ringbom as opposed to beta engine?
One method of sealing shafts that is done is to use V-ring seals. They fit tightly on the shaft, behind the main seal, like a skirt. When positive pressure in the crankcase tries to escape, it pushes the rubber skirt against a sealing surface with a lot of sealing area. Friction might be a price to pay for pressurization.
Pressuring a shaftless housing is still the easiest way, but if you feel it nessesary, V-ring seals may be the answer.

[speedless]

Hi
Look at this for idees.
http://www.stirling.dk/page_content.php ... pe=submenu
Jan