What is the change in diameter of a solid piston ring under pressure?
What is the change in diameter of a solid piston ring under pressure?
(OP)
Hi,
Just wondering if anyone can point me in the right direction to work out what the change in diameter of a piston ring under a internal pressure?
thnaks
Just wondering if anyone can point me in the right direction to work out what the change in diameter of a piston ring under a internal pressure?
thnaks





RE: What is the change in diameter of a solid piston ring under pressure?
RE: What is the change in diameter of a solid piston ring under pressure?
Thanks
RE: What is the change in diameter of a solid piston ring under pressure?
RE: What is the change in diameter of a solid piston ring under pressure?
Best answer evar, however I dont know if you're right, no star today.
RE: What is the change in diameter of a solid piston ring under pressure?
RE: What is the change in diameter of a solid piston ring under pressure?
nick
RE: What is the change in diameter of a solid piston ring under pressure?
RE: What is the change in diameter of a solid piston ring under pressure?
RE: What is the change in diameter of a solid piston ring under pressure?
I have seen gap less rings, but never rings with no split. How would you install them?
Real rings are restrained by the bore which as previously stated, are stable to within microns.
This has the benifit of a very small doubt at this stage, but unless I see a real reason for the question, I see a red flag appearing very soon, that is unless someone else has already done it.
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RE: What is the change in diameter of a solid piston ring under pressure?
RE: What is the change in diameter of a solid piston ring under pressure?
RE: What is the change in diameter of a solid piston ring under pressure?
jlwoodward: As I recall, the thick and thin walled cylinder equations apply to a theoretically infinite length cylinder. This isn't infinite length, which means it's a three dimensional problem instead of two. Someone please correct me if I'm wrong. Also "it cannot be a piston ring" more accurately could be stated "it cannot be a piston ring in a conventional reciprocating engine design". One example is polymer sealing rings used in automotive automatic transmissions. They are often solid rings without gaps and I would consider them "piston rings" in a more general sense.
RE: What is the change in diameter of a solid piston ring under pressure?
The whole idea behind a ring is to allow it to expand to exactly fill the bore, especially if gas pressure can get behind the ring to aid in the process. A completely solid ring is really a non functioning part.
RE: What is the change in diameter of a solid piston ring under pressure?
Just wondering if anyone can point me in the right direction to work out what the change in diameter of a piston ring under a internal pressure?
thnaks>>>>>>
Just so we can see the question again.
First what is the material of the ring?????
Second what is causing the internal pressure?????
Third what is the internal pressure????
Forth what are the dimensions of said piston ring????
If it is a plastic or teflon or rubber, it will expand
till it pops out of the piston ring land and or breaks. That is if there is no cylinder that the piston is fitted into, to restrain the ring from popping out. That is if it is a solid gapless ring.
If your talking a regular piston ring in the average piston engine. The diameter follows what ever the diameter of the cylinder is. So if heat or gas pressure expands the cylinder ever so slightly the ring follows it. And of course there is some leakage of gas past the ring as well as through the gap.
Or is the question really, what will be the expansive force of the ring against the cylinder under the influence of gas pressure?????