| 摘要 |
<p>A magnetic fluid seal with an excellent quality for reduction of leak of magnetic fluid is provided. Among the projections of the pole pieces 30 and 40, the projections 30a and 40a, that are nearest to the permanent magnet 20, are placed at positions intruding into the permanent magnet 20 sides to hold the magnetic fluid J in a space between the projections and the surface of the shaft 70. <IMAGE></p> |
