Automobile -used rotating oil seal with long dust lip

The utility model relates to an automobile -used rotating oil seal with long dust lip, including the primary seal body, be equipped with the long dust lip of outside extension on the primary seal body, long dust lip's marginating compartment is equipped with a plurality of interior concave surfaces and outer convex arc face. The beneficial effects of the utility model are that: after long dust lipinstalls interference fit with rotation axis or dust cover, thereby crest and dust cover contact or trough and rotation axis contact receive extrusion deformation and dust cover or rotation axis forms airtight contact, thereby local will the contact with dust cover or rotation axis of trough or crest will not form the less space of ventilating, help the circulation of air, prevent that the internal portion of primary seal from forming the negative pressure under the effect that the pump is inhaled, prevent simultaneously that the internal portion of primary seal from forming local high temperature, long dust lip's wa