Rotary-anode type x-ray tube with a hydrodynamic bearing...

Details Rotary-anode type x-ray tube with a hydrodynamic bearing... Rotary-anode type x-ray tube with a hydrodynamic bearing...

H - Electricity

01

J

H01J 35/10 (2006.01) F16C 33/10 (2006.01)

Patent

CA 2052472

In a rotary-anode type X-ray tube, a rotary anode is fixed to a cylindrical rotary structure, and a columnar stationary shaft is fitted 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 20 and 21 are formed in portions of the outer surface of the stationary shaft, and a sliding bearing is formed between the stationary shaft and the rotary structure. Base members consists 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 µm or more.

ans un tube à rayons X du type à anode rotative, une anode rotative est fixée à une structure cylindrique rotative, et un axe stationnaire en forme de colonne est logé dans la structure rotative. Un espace est formé entre la structure rotative et l'axe stationnaire , et l'espace est rempli d'un liquide lubrifiant pour métal. Des rainures en spirale 20 et 21 sont formées dans des parties de la surface extérieure de l'axe stationnaire, et un appui coulissant est formé entre l'axe stationnaire et la structure rotative. Des éléments d'appui faits de molybdène, de tungstène,de niobium ou de tantale, comme parties de surface, sont formés sur la surface intérieure de la structure rotative et sur la surface extérieure de l'axe stationnaire, et des couches réactionnelles contenant le matériau de l'élément d'appui et du gallium sont formées respectivement sur les parties de surface à une épaisseur de 1 µm ou plus.

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