A sealing device for a bearing unit having an axis of rotation and providing; a static component placed on a non-rotatable outer ring having a reinforcement support that abuts the outer ring and elastomeric material disposed on the reinforcement support, the elastomeric material forming first and second lips; a rigid shield configured for placement on one of a rotatable hub and a rotatable inner ring; the first and second lips have an equilibrium position where they do not contact the metallic shield; the elastomeric material forming a third lip that contacts the rigid shield to form an internal volume of the sealing device, the second lip and the rigid shield define a labyrinth seal in communication with the internal volume; the second lip, does not extend a full three hundred sixty degrees around the axis of rotation. This creates a channel for drainage of contaminants from the internal volume.
Labyrinth sealing device for improved drainage
2021-10-26
Patent
Elektronische Ressource
Englisch
Transportation Research Record | 2015
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