Sealing device

• Main Authors: XU FANGMAN, YAMANAKA SATOSHI, KAWAMOTO MAIKO, HOSONUMA NORIMASA
• Format: Patent
• Language: Chinese; English
• Published: 09.02.2018
• 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

The invention provides a sealing device including a seal flange and a seal lip slidably contacting the seal flange to suppress generation of static leakage when the rotation of a rotating shaft is stopped. For this purpose, the sealing device in the invention provides sealing so as to prevent a sealed fluid in a machine inner side from leaking to a machine outer side between a housing and a rotating shaft which is inserted to a shaft hole provided in the housing. A seal lip which is installed to an inner periphery of the shaft hole of the housing can slidably comes into contact with the seal flange which is installed to an outer periphery of the rotating shaft over an entire periphery. The sealing device is characterized by having a thread groove which exerts a fluid pumping action when the rotating shaft rotates and which is arranged at a position which does not intersect a contact area where the seal lip slidably comes into contact with the seal flange over the entire periphery. 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的密