Rotary-anode X-ray tube comprising a helical-groove sleeve beari

Details Rotary-anode X-ray tube comprising a helical-groove sleeve beari Rotary-anode X-ray tube comprising a helical-groove sleeve beari

1990-01-02

1991-11-26

Westin, Edward P.

X-ray or gamma ray systems or devices

Source

Electron tube

378132, 378125, 384371, H01J 3510

Patent

active

050688855

ABSTRACT:
The invention relates to a rotary-anode X-ray tube comprising a sleeve bearing, notably a helical-groove bearing, for journalling the rotary anode in the axial direction, which bearing comprises at least two pairs of bearing surfaces for taking up axial forces acting in opposite directions, each pair comprising two bearing surfaces which are present on bearing portions which are rotatable with respect to one another and which bearing surfaces cooperate via a lubricant, the helical-groove bearing communicating with the vacuum space of the X-ray tube via at least opening. Because at the area between the pairs of bearing surfaces there is provided a lubricant reservoir which communicates with the lubricant in the pairs of bearing surfaces and in the stationary bearing portion there is provided a duct which connects the lubricant reservoir to the vacuum space of the X-ray tube, it is achieved that the bearing will not be damaged in the case of loss of lubricant.

REFERENCES:
patent: 3399000 (1968-08-01), Remmers et al.
patent: 4220379 (1980-09-01), Pimiskern et al.
patent: 4413356 (1983-11-01), Hartl
patent: 4557610 (1985-12-01), Asada et al.
patent: 4573807 (1986-03-01), Asada et al.
patent: 4641332 (1987-02-01), Gerkema
patent: 4644577 (1987-02-01), Gerkema et al.
patent: 4856039 (1989-08-01), Roelandse et al.

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