Bearings – Rotary bearing – Fluid bearing
Patent
1991-09-05
1992-04-07
Footland, Lenard A.
Bearings
Rotary bearing
Fluid bearing
384117, 384119, F16C 1703
Patent
active
051022362
ABSTRACT:
A hydrodynamic thrust, journal or combined radial and thrust bearing and methods of manufacturing the same. The bearing includes a continuous bearing surface and support structure which supports the surface such that the surface may change shape and move in any direction (six degrees of freedom) to optimize formation of a converging wedge for hydrodynamic operation, equalization of load across the bearing surface in thrust bearings and to adjust for any shaft misalignment. The support structure can include a repeating series of support structure portions each including a fully rigid portion a partially rigid portion and connecting portions connecting the spaced portions. Alternatively, the support structure can include a spaced series of deflectable ears which are arranged such that the continuous surface deforms when the ear portions are deflected. The bearing may also include an additional support portion which includes one or more beam-like or membrane members. The bearing may include separate elements, such as piezoelectric elements, to allow selective alteration of the deflection characteristics of the bearings. The bearing may be made self lubricating through the provision of a lubricant absorbing and releasing material in the spaces within the support structure. The bearings may be made of a wide variety of materials including, plastics, ceramics, powdered metals, composites and metals. The bearings may be manufactured by simple molding using a two-piece camless mold, injection molding, casting, powdered metal die casting, extrusion, electric discharge or laser cutting.
REFERENCES:
patent: 3930691 (1976-01-01), Greene
patent: 4277113 (1981-07-01), Heshmat
patent: 4496251 (1985-01-01), Ide
patent: 4927275 (1990-05-01), Lawson
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