| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotary anode X-ray tube device and an X-ray imaging device, capable of attenuating rotational vibration to improve the life of a bearing, and thereby, of obtaining stable rotation in a long term.SOLUTION: A rotary anode X-ray tube device comprises a rotary anode X-ray tube configured to include: a cathode member generating an electron beam; an anode member generating an X-ray by collision of the electron beam; a rotary member supporting the anode member; a bearing box 7 freely rotatably supporting the rotary member via rolling bearings 10A and 10B; and a housing unit incorporating the cathode member, the anode member, the rotary member, and the bearing box 7 in a vacuum airtight manner. The rolling bearing 10A is arranged at least on the anode member side in an axial direction of the rotary member. A gap is formed between an outer ring of the rolling bearing 10A and an inner surface of the bearing box 7, and the gap is filled with a liquid metal. |
