LUBRICATED SEAL WITH AXIAL LIP

摘要

The present invention provides a rotary seal including a first part having an axial sealing lip and a second part having an axial counterface against which the axial sealing lip bears. According to the invention, a rotational one of the first part and the second part is provided with a reservoir for retaining a volume of grease at a location radially inward of the axial sealing lip. The reservoir is designed such that the movement of grease under the action of centrifugal force is prevented, while the movement of base oil, which bleeds from the volume of grease retained in the reservoir, is allowed. As a result, the supply of base oil to the sealing contact takes place for a longer period of time, which extends the life of the seal.

主权项

1. A seal comprising:
a first part, and a second part, the first part including an axial sealing lip, the second part including an axially oriented counterface, wherein a sealing contact is defined between the axial sealing lip and the axially oriented counterface; wherein one of the first part and the second part rotates with respect to the other of the first part and the second part, such that the the one of the first and second parts that rotates experiences a centrifugal force; and wherein the one of the first part and the second part that rotates is provided with a reservoir which retains a volume of grease at a location radially inward of the axial sealing lip, the reservoir being adapted to prevent the movement of grease under the action of centrifugal force but to allow the movement of base oil, bleeding from the volume of grease retained in the reservoir, towards the sealing contact.