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Should Foil bearing be merged with this page?? Pud, 8 June 04, 12:18 PST
I am in favor of more seperate and smaller pages rather than huge pages.141.157.83.53 03:57, 22 August 2006 (UTC)
Foil bearings are a type of air bearing, and air bearings are a type of fluid bearing. I second all the above from fluid bearings, seperate pages within a bearings, or more likely fluid bearings category would be best to increase ability to access and retrieve. This appears to have become a dead area discussion wise, but I am interested in helping to complete this it, although new to editing. Wease459 17:29, 6 December 2006 (UTC)
Can someone add some information about disadvantages of fluid bearings? The article lists only advantages. —Preceding unsigned comment added by 24.68.158.183 (talk) 07:40, 19 March 2008 (UTC)
I disagree with the statement that fluid bearings are stiffer than rolling element bearings. While it is possible to change design parameters and get anamolous results, typically in disk drive applications where I have worked the typical ball bearing stiffnesses are ~10^7 MN/m, typical reasonably designed fluid bearings have stiffness of ~10^6 MN/m.
Some disadvantages of fluid bearings: 1. power consumption is typically higher than ball bearings 2. power consumption and stiffness / damping greaty vary with temperature so complicates the design / operation of a fluid bearing in wide temperature range situations. 3. bearing seizures. Ball bearings deteriorate more gradually and show acoustic symptoms. Fluid bearings can lock up instantly under shock situations very catastrophically. 4. Half frequency whirl. Parallel to cage frequency vibration in a ball bearing, the half frequency whirl is a bearing instability that generates eccentric precession which can lead to poor performance / life. 5. Fluid leakage: keeping oil in bearing is a challenge and in environments where oil leakage can be destructive (ie. disk drives) or where maintenance is not economical (i.e. disk drives, in contrast to aircraft turbine bearings for instance can be serviced and make up oil can be arranged) fluid bearings can introduce complications.
A great advantage: 1. Damping: what fluid bearings compromise in stiffness they greatly compensate for with damping. This helps attenuate resonation at the gyroscopic frequencies (sometimes called conical or rocking modes).
S71murfy (talk) 04:07, 19 January 2009 (UTC) S71murfy
At the beginning of this article, it is stated that a hydrostatic bearing uses an external pressure pump. Under "Journal Bearings", it is stated that the bearings used in petrol and diesel motors are hydrodynamic. These motors use external pressure pumps to maintain fluid pressure. The article contradicts itself.--69.122.62.231 (talk) 17:11, 10 November 2009 (UTC)
Why does this first sentence sound like it is describing how lubricants work in general. "Fluid bearings are bearings which support the bearing's loads solely on a thin layer of liquid or gas.". You and I know there are hundreds of bearings that use a "thin" layer of liquid lubricants. — Preceding unsigned comment added by Steelmesh (talk • contribs) 01:08, 27 October 2011 (UTC)
I think it's a bit difficult to read and that more can be done with formatting to make it easier to understand. StainlessSteelScorpion (talk) 12:50, 1 June 2014 (UTC)