Crank case

Discussion on Stirling or "hot air" engines (all types)
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Aviator168
Posts: 308
Joined: Tue Feb 08, 2011 2:29 pm
Location: Brokeville, NY. USA

Crank case

Post 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
Ian S C
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Joined: Thu Dec 02, 2010 5:15 am
Location: New Zealand

Re: Crank case

Post by Ian S C »

Wai, the short answer is, yes. Ian S C
Aviator168
Posts: 308
Joined: Tue Feb 08, 2011 2:29 pm
Location: Brokeville, NY. USA

Re: Crank case

Post 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.
Aviator168
Posts: 308
Joined: Tue Feb 08, 2011 2:29 pm
Location: Brokeville, NY. USA

Re: Crank case

Post 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)?
vile_fly
Posts: 139
Joined: Sat Jan 01, 2011 9:53 am
Location: USA - Kansas City, Missouri

Re: Crank case

Post 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.
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speedless
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Joined: Fri Apr 06, 2007 1:58 pm

Re: Crank case

Post by speedless »

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