| 摘要 |
PURPOSE:To prevent an exciting coil from burning and the vibration as well as noise produced by the exciting coil in operation by soaking the exciting coil and a moving iron core into oil. CONSTITUTION:A window hole 4 made in metal fittings 3 within a plastic case 2 is fitted with an exciting coil 5 and a moving iron core 6 is inserted in the inside of the coil 5. An expanded pedestal 7 formed on the upper end of the iron core 6 is placed on the upper end of the metal fittings 3. A moving rod 9 is installed on the center of the expanded pedestal 7 with a shaft 8 and on the upper end periphery of the case 2 and then outwardly projected from the upper side of a cover 10 that can be burned. The case 2 is filled with oil H to soak the exciting coil 5, moving iron core 6 and metal fittings in the oil H. |
