calculation of a radial bearing whose fluid medium is pressurized?
calculation of a radial bearing whose fluid medium is pressurized?
(OP)
Hi,
I've got a runner-in-housing assembly which behaves kind like a radial bearing, whose fluid medium is water.
The fact is that this water is pressurized, i.e. the average pressure inside the "bearing" at rest is not zero.
Does this pressure have an influence on the static behavior of the bearing under load, or will the bearing behave just like if the fluid medium was not pressurized?
I believe it doesn't make any difference, but my application is somewhat critical and I'd prefer to be really sure about this point...
I don't know if I have been clear... Don't hesitate to ask me for other clarifications...
Thanks in advance !
Regards
I've got a runner-in-housing assembly which behaves kind like a radial bearing, whose fluid medium is water.
The fact is that this water is pressurized, i.e. the average pressure inside the "bearing" at rest is not zero.
Does this pressure have an influence on the static behavior of the bearing under load, or will the bearing behave just like if the fluid medium was not pressurized?
I believe it doesn't make any difference, but my application is somewhat critical and I'd prefer to be really sure about this point...
I don't know if I have been clear... Don't hesitate to ask me for other clarifications...
Thanks in advance !
Regards





RE: calculation of a radial bearing whose fluid medium is pressurized?
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RE: calculation of a radial bearing whose fluid medium is pressurized?
Sorry, thanks
RE: calculation of a radial bearing whose fluid medium is pressurized?
http://en.wikipedia.org/wiki/Fluid_bearing
If so, no pressure and you get solid contact between bearing surfaces. Even in static conditions this could cause damage to surfaces which have to be precise. Depends on application and bearing.
RE: calculation of a radial bearing whose fluid medium is pressurized?
TTFN
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RE: calculation of a radial bearing whose fluid medium is pressurized?
To my perspective there is no effect. For given conditions of loading, geometry, fluid, the pressure solution given by the differential equations will be satisfied by a group of equations with an arbitrary additive constant (if you take the solution and add any constant pressure P0 to all points in space, the solution still satisfies the differential equation.). Also of course if you add any constant pressure P0 to all points in space, there is no change to the force on the shaft since the sum of P0 acting around the circumference of the shaft is 0. All that is left is change in fluid parameters (viscosity) with pressure as far as I can see.
Now if the source of pressure involved axial flow through bearing, that might be a different discussion.
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(2B)+(2B)' ?
RE: calculation of a radial bearing whose fluid medium is pressurized?
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(2B)+(2B)' ?
RE: calculation of a radial bearing whose fluid medium is pressurized?
thanks to all for your attention, and sorry again for the double post.
I replied to Electricpete and WCFoiles in the other thread, let's continue the discussion there (Bearing Design forum) so the moderators won't ban me
Thank you again, your comments are very precious for me!