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patel_nilu2006
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Air Compressed Engine

12/26/2010 3:02 PM

hi friends i want to built this type of air compressed engine,asumming pressure=5 n/mm2,length of stroke 24 mm,cylinder ineer radius=11 mm , outer rad.=12.5 mm,cylindr head thicknes=1.48 mm,..........

i want to how can we assume pressure =5 n/mm2,because i have taken it from refrence site
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lyn
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#1

Re: air compressed engine

12/26/2010 3:38 PM

"i have taken it from refrence site"

What "refrence" site??

Why the propeller?
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yesyen
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#5
In reply to #1

Re: air compressed engine

12/26/2010 11:41 PM

"Why the propeller?"

I think the propeller is the load. It appearers the purpose of air engine is to run this propeller.

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PWSlack
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#12
In reply to #5

Re: air compressed engine

01/04/2011 11:45 AM

Then it might be worth the OP dispensing with it and using the compressed air as some form of jet perhaps? Action-reaction, that sort of thing?

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yesyen
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#13
In reply to #12

Re: air compressed engine

01/04/2011 12:28 PM

But, look at post # 6 and 7, it could be wind powered air compressor.

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Tornado
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#2

Re: air compressed engine

12/26/2010 3:49 PM

You can assume the pressure to be anything you want, but it will more useful if the assumption matches some readily available source pressure.

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JohnDG
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#3

Re: air compressed engine

12/26/2010 5:00 PM

There is no apparent means of causing the output (propeller?) shaft to rotate. Please explain more.

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Tornado
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#4

Re: Air Compressed Engine

12/26/2010 8:29 PM

Inside the reddish shaft surround, and /or on the yellow shaft, there must be machined passages that make this into a 4-way valve, directing air alternately to the upper/lower cylinder and exhausting air from the lower/upper cylinder.

(If this portion were rolled 90°, it would simplify some of the tube bending.)

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yesyen
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#6
In reply to #4

Re: Air Compressed Engine

12/27/2010 12:14 AM

The working principle is well explained. In his pictures, the provision for exhausting the spent air is not seen, but can be achieved in one way or other.

If you critically look at these pictures, it appears as a model of 'compressor' driven by windmill. The vise versa is also possible. The uniqueness of this model is, the referred 4-way valve is activated by the rotation of the propeller shaft.

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34point5
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#7
In reply to #6

Re: Air Compressed Engine

12/27/2010 1:15 AM

I believe you are correct - it is a wind powered air compressor.

Q. 1. is why not use reeds?

Q.2. is why is it 'constant volume' when wind power and reservoir pressures have a vast range of variables?

Q.3. Why would it start, short of a howling gale, if the system has any pressure?

I hope he didn't pay for it.

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masu
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#8

Re: Air Compressed Engine

12/27/2010 4:58 AM

The pressure definitely doesn't sound correct to me as 5 N/mm2 is 5 MPa (725 psi) which to me sounds ridiculously high for something that looks to be machine that demonstrates a principle rather than something that does real work.

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ronwagn
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#9

Re: Air Compressed Engine

12/27/2010 5:15 AM

Are air or hydraulic systems inherently more efficient than mechanical transmission of force? What are the pros and cons?
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XNuke
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#10

Re: Air Compressed Engine

12/27/2010 9:45 AM

It would probably be cheaper to buy an air driven impact wrench if the propeller is a large load or an air drill if it is a small load. Use a pressure regulator or gear set to get the speed you want. Just don't let the blade tip speed reach the speed of sound or you'll have more vibration than you know what to do with.

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Anonymous Poster
#11

Re: Air Compressed Engine

12/27/2010 1:04 PM

You did a good graphics, but why? This would be so inefficient!
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