Bearings – Rotary bearing – Fluid bearing
Patent
1991-09-20
1992-12-08
Footland, Lenard A.
Bearings
Rotary bearing
Fluid bearing
3849071, 384912, F16C 3312
Patent
active
051692430
ABSTRACT:
A dynamic pressure bearing for an X-ray tube having a rotary anode has a cylinder member for supporting the anode and a shaft member fitted in the cylinder member. Between the cylinder member and the shaft member is formed a given clearance, which is filled with lubricant formed of either gallium or gallium alloy. The shaft member has on its outer peripheral surface a plurality of grooves for generating dynamic pressure. A body of each of the cylinder member and the shaft member is formed of ceramic which has corrosion resistance against gallium and gallium alloy of the lubricant. The grooves for generating dynamic pressure can be easily worked on the body of the shaft member because it is formed of ceramic having a good workability. Glass, tantalum or tantalum alloy can be used instead of ceramic.
Kakumoto Ken-ichi
Takahashi Takeshi
Footland Lenard A.
Koyo Seiko Co. Ltd.
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