| 摘要 |
PROBLEM TO BE SOLVED: To hold the magnetic sealing performance for a long time with the simple structure. SOLUTION: This device is provided with a magnetic seal main body 10 for sealing between a partitioning wall 101 and a rotary shaft 102 with the magnetic fluid filled inside thereof, and provided with a fin member 20. The magnetic seal main body 10 is installed between the partitioning wall 101, which forms a sealed space in the pressure reduction condition, and the rotary shaft 102 passing through the partitioning wall 101. The fin member 20 is integrally rotated with the rotary shaft 20 outside of the magnetic seal main body 10, and while reduces the pressure in an air reservoir 21, which is formed outside of the magnetic seal main body 10 accompanying with the rotation of the shaft 102. |
