X-ray or gamma ray systems or devices – Source – Electron tube
Patent
1996-01-23
1997-02-11
Wong, Don
X-ray or gamma ray systems or devices
Source
Electron tube
378133, H01J 3524
Patent
active
056028989
ABSTRACT:
A rotary-anode X-ray tube, include a sleeve bearing which serves to journal the rotary anode which sleeve bearing has a stationary bearing portion and a bearing portion which is rotatable about an axis of rotation. The two bearing portions cooperate with one another via a lubricant and have bearing surfaces which extend perpendicularly to the axis of rotation in order to take up axial bearing forces. The bearing surfaces changes over into external surfaces which form a lubricant gap between the bearing portions and one of which is provided with a groove pattern. In order to maintain the bearing capacity of this bearing also for forces acting in the axial direction, even under unfavorable operating conditions, the external surface of the rotatable bearing portion which bounds the lubricant gap has a cross-section which is symmetrical with respect to the axis of rotation whereas the cross-section of the external surface of the stationary bearing portion which bounds the lubricant gap is non-symmetrical with respect to the axis of rotation.
REFERENCES:
patent: 4798480 (1989-01-01), Van Beek
patent: 5068885 (1991-11-01), Vetter
patent: 5504797 (1996-04-01), Vetter
Tielemans Leo P. M.
Vetter Axel
Slobod Jack D.
U.S. Philips Corporation
Wong Don
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