| 摘要 |
A hydrodynamic seal for location in a seal groove of a structure, such as a housing and for dynamic sealing engagement with a relative rotatable surface . Elevated contact pressure zones caused by pressure manipulation features (18 ) located at least partially on the dynamic sealing surface (8) of the seal provide for controlled lubricant movement within the dynamic sealing interfa ce between the seal (2) and the relatively rotatable surface for enhanced lubrication of the seal (2) even when the seal (2) defines a wide sealing footprint with the relatively rotatable surface. The pressure manipulation feature (18) may be defined by projections at least partially from the dynam ic sealing lip which are compressed against the relatively rotatable surface or depressions which define pressure manipulating edges which react with the lubricant in the dynamic sealing interface responsive to relative rotation. The projections (18) or depressions may be of elongate form and may be oriented in skewed relation with respect to the direction of relative rotati on.
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