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Patent Searching and Data


Title:
DYNAMIC PRESSURE BEARING MADE OF CERAMICS
Document Type and Number:
Japanese Patent JP2005337508
Kind Code:
A
Abstract:

To provide a dynamic pressure bearing made of ceramics capable of preventing vibration and seizure from occurring during the rotation.

This dynamic pressure bearing 3 comprises a cylindrical bearing 5 and a main shaft 9 inserted in a through hole 7 in the axial direction of the bearing 5. The main shaft 9 is fixed so as not to be rotated and its bearing 5 side is rotated. The main shaft 9 is eccentrically disposed in the through hole 7. Accordingly, by the principle of the dynamic pressure bearing, the bearing 5 is rotated at high speeds in non-contact with the main shaft 9. The bearing 5 and the main shaft 9 are made of aluminum ceramics, and the surface roughnesses Sm of the rotating surfaces 5a and 9a thereof are set within the range of 5 to 50 μm.


Inventors:
ISHIKAWA TAKANOBU
YOGO TETSUJI
Application Number:
JP2005236643A
Publication Date:
December 08, 2005
Filing Date:
August 17, 2005
Export Citation:
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Assignee:
NGK SPARK PLUG CO
International Classes:
F16C33/24; C04B35/00; F16C17/02; (IPC1-7): F16C33/24; C04B35/00; F16C17/02
Attorney, Agent or Firm:
Tsutomu Adachi