Fluid dynamic pressure bearing and spindle motor

Details Fluid dynamic pressure bearing and spindle motor Fluid dynamic pressure bearing and spindle motor

2007-09-04

2007-09-04

Le, Dang (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

Reexamination Certificate

active

10904384

ABSTRACT:
A fluid dynamic pressure bearing having a tapered seal part provided between a sleeve and a housing, from which lubricating liquid is injected and functions as a buffer of the lubricating liquid. An end part of a radial gap between the sleeve and a shaft body is a labyrinth filled with lubricating liquid. An opening periphery is covered with an oil repellent film to prevent outflow of the lubricating liquid. These features can make the size of the tapered seal part small in the axial direction. It enables a larger radial dynamic pressure bearing mechanism to be formed and, in particular, bearing rigidity in the radial direction can be increased.

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patent: 7005768 (2006-02-01), Tamaoka et al.
patent: 2004/0070298 (2004-04-01), Aiello et al.
patent: A-H07-75313 (1995-03-01), None
patent: U-H07-027269 (1995-05-01), None
patent: A-H08-331796 (1996-12-01), None
patent: A-H09-79272 (1997-03-01), None

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