Page 1 of 1
Crank case
Posted: Wed Feb 09, 2011 12:54 pm
by 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
Re: Crank case
Posted: Thu Feb 10, 2011 5:44 am
by Ian S C
Wai, the short answer is, yes. Ian S C
Re: Crank case
Posted: Thu Feb 10, 2011 9:29 am
by 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.
Re: Crank case
Posted: Thu Mar 10, 2011 12:22 pm
by Aviator168
Ian S C wrote: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)?
Re: Crank case
Posted: Thu Mar 10, 2011 9:30 pm
by 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.
Re: Crank case
Posted: Fri Mar 11, 2011 7:42 am
by speedless