Bearings – Rotary bearing – Fluid bearing
Patent
1987-08-12
1989-01-03
Levy, Stuart S.
Bearings
Rotary bearing
Fluid bearing
277 80, 384119, 384132, F16C 3206, F16C 3374, F16J 1540
Patent
active
047952750
ABSTRACT:
A rotatable shaft/thrust plate combination is disposed within a sleeve to form a first clearance space between the shaft and the sleeve and a second clearance space between the thrust plate and the sleeve. The external faces of the thrust plate are exposed to air. The clearance spaces are filled with a liquid lubricant and the sleeve includes pressure equalization ports connecting the first and second clearance spaces. Surface tension dynamic seals are provided between axially extending surfaces of the thrust plate and sleeve. The equalization ports balance the hydrodynamic pressures in the lubricant to prevent the lubricant being pumped through one of the dynamic seals. The resulting bearing provides high precision with low repetitive and nonrepetitive runouts. The bearing provides hydrodynamic support of both radial and axial loads and the bearing seal is relatively insensitive to orientation of the spindle and minimizes the generation of debris and contaminating particles.
REFERENCES:
patent: 3325231 (1967-06-01), Ono
patent: 3726574 (1973-04-01), Tuffias et al.
patent: 3746407 (1973-07-01), Stiles
patent: 3998501 (1976-12-01), Cyphelly
patent: 4043612 (1977-08-01), Orcutt
patent: 4254961 (1981-03-01), Fersht et al.
patent: 4444398 (1984-04-01), Black, Jr. et al.
patent: 4526484 (1985-07-01), Stahl et al.
patent: 4565379 (1986-01-01), Ballhaus
patent: 4630943 (1986-12-01), Stahl et al.
patent: 4694213 (1987-09-01), Gowda et al.
Cordova Jackie
Titcomb Forrest
Digital Equipment Corporation
Hannon Thomas R.
Levy Stuart S.
LandOfFree
Hydrodynamic bearing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydrodynamic bearing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrodynamic bearing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2165525