| 摘要 |
PURPOSE:To ensure given stable sealing performance by using centrifugal force during rotation and keeping a boundary plane in a well-lubricated condition, improve usable shaft-diameter peripheral speed by exhibiting sufficient cooling effect and maintain sealing property for both positive and negative pressure specifications. CONSTITUTION:The first and second elastic sealings 11, 12 are arranged on bottom sides in the axial direction of a plate fixed to a casing 1 so that the outer-periphery outside faces 11d, 12e of the collars 11b, 12c of both elastic sealings 11, 12 can be put in slide contact with both side faces 4a, 4b of the plate 4 to fill grease G in a space P encircled with a shaft 3, the plate 4 and both elastic sealings 11, 12. |
