Self-contained hydrodynamic bearing unit and seals

Details Self-contained hydrodynamic bearing unit and seals Self-contained hydrodynamic bearing unit and seals

1994-12-22

1996-09-24

Hannon, Thomas R.

Bearings

Rotary bearing

Plain bearing

384107, 384135, F16C 3374, F16C 3206

Patent

active

055584454

ABSTRACT:
A self-contained hydrodynamic bearing unit includes a shaft and a shaft housing defining an opening for receiving the shaft for relative rotation. The shaft and bearing define at least one radial hydrodynamic bearing and an annular thrust bearing, formed as a disk portion extending radially outward of a main cylindrical surface of the shaft which cooperates with an adjacent annular face of the shaft housing. A gap between an outer cylindrical wall of the thrust bearing disk portion and an adjacently facing cylindrical surface of the shaft housing provides a primary annular capillary seal segment. An annular bushing ring extends from the housing radially inwardly to enclose the thrust bearing disk, and cooperates with an adjacent outer face of the thrust bearing disk to provide a secondary containment capillary seal segment. Normally, lubricating liquid is in the bearing unit at the radial hydrodynamic bearing, at the hydrodynamic thrust bearing and in the primary annular capillary seal segment. However, if liquid overflows from, or extends beyond the primary seal segment as by thermal expansion, it is contained in the secondary seal segment and urged to return by centrifugal force to the primary seal segment. A tertiary containment seal may also be provided to prevent escape of liquid to the external ambient.

REFERENCES:
patent: 3325231 (1967-06-01), Ono
patent: 3778123 (1973-12-01), Hendler et al.
patent: 4254961 (1981-03-01), Fersht et al.
patent: 4274684 (1981-06-01), Richfield
patent: 4596474 (1986-06-01), Van Roemburg
patent: 4726693 (1988-02-01), Anderson et al.
patent: 4795275 (1989-01-01), Titcomb et al.
patent: 4892418 (1990-01-01), Asada et al.
patent: 5067528 (1991-11-01), Titcomb et al.
patent: 5112141 (1992-05-01), Asada et al.
patent: 5112142 (1992-05-01), Titcomb et al.
patent: 5246294 (1993-09-01), Pan
patent: 5427456 (1995-06-01), Hensel

Affiliated with

Also associated with

Rating

Self-contained hydrodynamic bearing unit and seals does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Self-contained hydrodynamic bearing unit and seals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-contained hydrodynamic bearing unit and seals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1924396