Bearings – Rotary bearing – Fluid bearing
Patent
1995-11-22
1997-01-14
Hannon, Thomas R.
Bearings
Rotary bearing
Fluid bearing
384117, 384309, F16C 3206
Patent
active
055932320
ABSTRACT:
An integral pivot pad bushing seal bearing, adapted for sealing about a rotating shaft, includes a carrier ring having a radially inner generally cylindrical surface for providing a fluid seal about the shaft. A plurality of cavities are formed in the carrier ring so as to open in the radially inner generally cylindrical surface. Each cavity contains a pivot pad having a radially inner generally cylindrical pad surface which is substantially flush with the radially inner generally cylindrical surface of the carrier ring. The carrier ring and the pivot pads are contained in the same axial length as a unitary structure and act together to both seal and support the shaft. Each cavity can have a longitudinally extending groove in its radially outermost portion for receiving high pressure fluid to press each pivot pad inwardly toward the shaft. A second groove, in communication with the first groove, can be formed in a cavity end wall to apply high pressure to an axial face of the pivot pad. Each of a plurality of fluid passageways extend from an exterior surface, which is exposed to high pressure, of the carrier ring to a radially outer portion of a respective cavity so that high pressure fluid is supplied to the gap between the pivot pad and the arcuate cavity wall to act against the radially outermost portion of the outer arcuate pad surface to provide positive lubrication between the contact surfaces and to press the respective pivot pad toward the shaft.
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Tech Facts TF7-00, "Tilt Pad Oil Film Seal", by Dresser. No Date.
Dresser-Rand Company
Hannon Thomas R.
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