| 摘要 |
A sealing device has a sealing device main body (1), in which a seal lip (13) oriented to an in-machine (A) side slidably contacts with the outer peripheral surface of a rotating body (4), and a pumping device (2) having a helical groove (2a) which feeds fluid to the seal lip (13) side by rotation of the rotating body (4), the groove being formed in a surface opposed to the outer peripheral surface of the rotating body (4) to be positioned at the in-machine (A) side of the seal lip (13), and discharge flow passages (2b) which make a space (C) between the sealing device main body (1) and the pumping device (2) communicate with the in-machine (A) side, whereby sufficient lubricating oil can be supplied to a sliding portion of the seal lip and heat generation and the wear of the seal lip can be suppressed.
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