Title:
改良した流体軸受装置
Document Type and Number:
Japanese Patent JP4046356
Kind Code:
B2
Abstract:
A self-contained hydrodynamic bearing unit with improved sealing and performance is disclosed. Centrifugal capillary seals are angularly defined between an outwardly tapered outer surface of a top screw and an inwardly tapered inner surface of an annular clamp ring at the top of the bearing unit as well as between an outwardly tapered outer surface of a seal plate and an inwardly tapered inner surface of an annular clamp ring at the bottom of the bearing unit. During operation, bearing lubricant is pumped away from the seal opening and toward the bearings by centrifugal force at the seals, providing dynamic sealing. When the bearing unit is not rotating, capillary forces retain the lubricant within the seal, preventing the lubricant from leaking. The tapered configuration of the seals also shortens the vertical seal length for a given effective seal length, thereby maximizing the journal bearing length/span and improving dynamic performance of the bearing unit.
Inventors:
Zan, Yen
Hatch, Michael Earl
Shinichi Mizuguchi
Hatch, Michael Earl
Shinichi Mizuguchi
Application Number:
JP53899397A
Publication Date:
February 13, 2008
Filing Date:
April 23, 1997
Export Citation:
Assignee:
QUANTUM CORPORATION
Matsushita Electronics Industry Co., Ltd.
Matsushita Electronics Industry Co., Ltd.
International Classes:
F16C17/10; F16C33/74; F16C33/10; G11B19/20
Attorney, Agent or Firm:
Kuro Fukami
Toshio Morita
Hidehiko Ito
Yutaka Horii
Toshio Morita
Hidehiko Ito
Yutaka Horii