| 摘要 |
PURPOSE:To obtain a low cost vibration control mechanism with simplified structure having such an effect of controlling vibration as that of oil film dumper by dividing a bearing support of rotary anode X-ray tube into a plurality of segments and forming viscous layer or viscous and elastic layer between laminated plates. CONSTITUTION:A support body which is fixed with a holding ring 15 to a frame 13 is formed by laminating three sheets of disks 16A, 16B, 16C having a little different rigidity, each disk is respectively provided with many small holes 20A, 20B, 20C in different positions. A housing 9 is filled with oil 11. The oil enters the clearance of disks 16A, 16B, 16C from small holes 20A, 20B, 20C. When a rotating body formed by target, motor rotor and shaft vibrates, a bearing box 6 also vibrates and each disk 16A, 16B, 16C which is the support body also vibrates. Each disk relatively vibrates in the circumferential direction and radius direction, the oil between the disks moves in the circumferential and radius direction in accordance with vibration and vibration can be attenuated within a short period of time. |
