| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotatary anode X-ray tube capable of informing the temperature of a dynamic pressure sliding bearing portion and inhibiting the temperature rise, easy to manufacture and superior in mechanical strength for maintaining stable rotating property for a long time. SOLUTION: The rotatary anode X-ray tube comprises a rotor 16 connected with an anode target 13 for emitting an X-ray, a fixed body 17 provided with a dynamic pressure sliding bearing in a space to the rotor 16 and having a lubricant storage room 26 formed along a tube axis and a lubricant passage 27 connecting the lubricant storage room 26 and the dynamic pressure sliding bearing, and a vacuum container 11. The fixed body 17 is provided with holes 28a, 28b ranging from the end face toward the tube axis, without crossing the lubricant storage room 26 and the lubricant passage 27, and fixed body heat transfer members 29a, 29b having higher heat conductivity than the fixed body 17 are fitted into the holes 28a, 28b, or a heat transfer member 19 having higher heat conductivity than an inside cylindrical structure is cylindrically bonded to the outer periphery wall of the inside cylindrical structure 16c constituting a bearing of the rotor 16. Otherwise, heat transfer members are provided on both the rotor and the fixed body.
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