Rotary-anode type X-ray tube

Details Rotary-anode type X-ray tube Rotary-anode type X-ray tube

1991-09-27

1993-01-19

Church, Craig E.

X-ray or gamma ray systems or devices

Source

Electron tube

378132, H01J 3524

Patent

active

051812355

ABSTRACT:
In a rotary-anode type X-ray tube, a rotary anode is fixed to a cylindrical rotary structure, and a columnar stationary shaft is fit in the rotary structure. A gap is formed between the rotary structure and the stationary shaft, and the gap is filled with a liquid metal lubricant. Spiral grooves are formed in portions of the outer surface of the stationary shaft to form a sliding bearing between the stationary shaft and the rotary structure. Base members of molybdenum, tungsten, niobium, or tantalum, as surface portions, are formed on the inner surface of the rotary structure and the outer surface of the stationary shaft, and reaction layers containing the material for the base member and gallium are respectively formed on the surface portions to a thickness of 1 .mu.m or more.

REFERENCES:
patent: 4210371 (1980-07-01), Gerkema et al.
patent: 4562587 (1985-12-01), Gerkema et al.
patent: 4641332 (1987-02-01), Gerkema
patent: 4856039 (1989-08-01), Roelandse et al.

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