| 摘要 |
PURPOSE:To prevent the scattering of magnetic worn powder by fixing a permanent magnet 5 around the external surface of a shaft box with a small gap left between the magnet and the internal surface of a rotor. CONSTITUTION:A rotating anode comprising a rotor 3 and target 4 is supported rotatably through a bearing by a shaft box 2 fixed on one end of a bulb 1. The rotor 3 is rotated with high speed by a rotating magnetic field from a stator provided on the periphery of the bulb 1. A permanent magnet 5 is fixed around the external surface of the shaft box 2 with an extremely small gap 6 left between the magnet 5 and the internal surface of the rotor 3. Thus, scattered magnetic worn powder is attracted and caught on the external surface of the permanent magnet, and the further scattering to other spaces can be prevented. |
