| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rotary anode type X-ray tube and an anode type X-ray tube device that perform excellent bearing operation. <P>SOLUTION: The rotary anode type X-ray tube includes a fixed body with a thrust bearing surface, a rotary body 20 with the other thrust bearing surface, a lubricant charged in a gap between the fixed body and rotary body, a projection part, an anode target 50, a cathode, and a vacuum envelope. The projection part is provided to at least one of the thrust bearing surface and the other thrust bearing surface, projects in a thrust direction, and narrows down a gap between the thrust bearing surface and the other thrust bearing surface, thereby forming a dynamic pressure type thrust plain bearing together with the thrust bearing surface, the other thrust bearing surface, and the lubricant. <P>COPYRIGHT: (C)2012,JPO&INPIT |
