Seal device

• Main Authors: XU FANGMAN, YAMANAKA SATOSHI, KAWAMOTO MAIKO, HOSONUMA NORIMASA
• Format: Patent
• Language: Chinese; English
• Published: 22.02.2017
• Subjects: BLASTING; CYLINDERS; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; PISTONS; SEALINGS; THERMAL INSULATION IN GENERAL; WEAPONS

A seal device provided with a sealing flange and a sealing lip in slidable contact with the sealing flange, wherein the occurrence of still leakage is suppressed when a rotating shaft stops rotating. To achieve this purpose, the invention provides a seal device for sealing the space between a housing and a rotating shaft inserted through a shaft hole provided in the housing to prevent a sealed fluid inside the device from leaking out of the device, a sealing lip fitted to the inner periphery of the shaft hole of the housing being in slidable contact with the entire periphery of a sealing flange fitted to the outer periphery of the rotating shaft; and the seal device being characterized in that a screw groove is provided for exerting a fluid pumping action when the rotating shaft rotates, and the screw groove is provided to a position where the screw groove does not cross the contact area in which the sealing lip is in slidable contact with the entire periphery of the sealing flange. 本发明提供种具备密封凸缘以及能够滑动地接触该密封凸缘