Self-pressure-balanced hydrodynamic bearing spindle motor

Details Self-pressure-balanced hydrodynamic bearing spindle motor Self-pressure-balanced hydrodynamic bearing spindle motor

1997-04-15

1998-12-08

LaBalle, Clayton

Electrical generator or motor structure

Dynamoelectric

Rotary

384107, 384112, H02K 516, F16C 3206

Patent

active

058474790

ABSTRACT:
A hydrodynamic spindle motor of the present invention may include a shaft having a thrust bearing plate, an insert surrounding the shaft above the thrust bearing plate, and a sleeve surrounding the shaft below the thrust bearing plate. In one embodiment the thrust bearing plate is substantially centrally positioned along the longitudinal axis of the shaft. Preferably either the shaft has annular skewed herringbone shaft grooves or, alternatively, the insert has annular skewed herringbone insert grooves and the sleeve has annular skewed herringbone sleeve grooves. A set of circulation channels above the thrust bearing plate and a set of circulation channels below the thrust bearing plate preferably cross a shaft bore to allow for flow of lubricating fluid. A face seal may be formed between the lower radial cap surface of an end cap and an upper radial insert surface of the insert. The face seal may be used to form a capillary seal when the motor is in a static state and a pumping seal when the motor is in a dynamic state. The face pattern, in one embodiment, has a first annular zone adjacent the shaft, a middle annular groove, and a second annular zone.

REFERENCES:
patent: 3746407 (1973-07-01), Stiles et al.
patent: 3782737 (1974-01-01), Ludwig et al.
patent: 4445793 (1984-05-01), Shinohara
patent: 4726693 (1988-02-01), Anderson et al.
patent: 4795275 (1989-01-01), Titcomb et al.
patent: 4883367 (1989-11-01), Maruyama
patent: 5067528 (1991-11-01), Titcomb et al.
patent: 5112142 (1992-05-01), Titcomb et al.
patent: 5246294 (1993-09-01), Pan
patent: 5407281 (1995-04-01), Chen
patent: 5433529 (1995-07-01), Hensel
patent: 5516212 (1996-05-01), Titcomb
patent: 5524985 (1996-06-01), Deerfield
patent: 5524986 (1996-06-01), Leuthold et al.
patent: 5548437 (1996-08-01), Yoshimoto et al.
patent: 5634724 (1997-06-01), Zang et al.
patent: 5667309 (1997-09-01), Nose
"Development of Non-Contacting, Non-Leaking Spiral Groove Liquid Face Seals", by Tom Lai, Presented as a Society of Tribologists and Lubrication Engineers paper, STLE/ASME Tribology Conference, New Orleans, Louisiana, Oct. 24-27, 1993, Lubrication Engineering, vol. 50, 8, pp. 625-627, 629.

Affiliated with

Also associated with

Rating

Self-pressure-balanced hydrodynamic bearing spindle motor 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-pressure-balanced hydrodynamic bearing spindle motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-pressure-balanced hydrodynamic bearing spindle motor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-181002