Method and bearing construction for control of hot oil carryover

Details Method and bearing construction for control of hot oil carryover Method and bearing construction for control of hot oil carryover

1993-12-07

1996-08-20

Footland, Lenard A.

Bearings

Rotary bearing

Fluid bearing

384114, 384137, 384311, F16C 1703

Patent

active

055472877

ABSTRACT:
A method and bearing construction for inhibiting hot oil carryover in hydrodynamic bearings. The method includes supporting the pads so that they form a hydrodynamic wedge and supplying oil to the entrance of the wedge. The oil flowing through the wedge is pressurized and oil exiting the hydrodynamic wedge is directed away from the adjacent wedge. Oil is then supplied from another source to the adjacent wedge.
Various bearing constructions can be used to practice the method of the present invention. These bearing constructions include some form of a scraper to inhibit flow of hot oil. The scraper is located between the trailing edge of one bearing pad and the fluid nozzle passage of an adjacent pad. The scraper may be integrally formed with the bearing pad or it may be separate. The scraper may be pushed toward or away from the shaft using electrical, mechanical, hydraulic or magnetic devices.
An alternative form of hydrodynamic bearing including two different types of pads is also disclosed. In this bearing, at least one of the sets of pads is movable toward and away from the shaft to provide both a scraping function and a support function.

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