Patent ID: 8449201

Claim:
A wind energy system comprising at least one pitch bearing having two concentric rings rotatable relative to one another, comprising an inner ring and an outer ring, each of the concentric rings having fastening holes parallel to an axis of rotation, and defining a gap in which raceways for at least one row of rollers are provided, and a seal comprising at least one first sealing ring of a permanently elastic material fixed to the outer ring in an encircling annular recess in an outer axial facing surface of the outer ring, and at least one second sealing ring of a permanently elastic material fixed to the inner ring in an encircling annular recess in an outer radial facing surface of the inner ring, wherein said second sealing ring supports an annular strip in an annular recess, said annular strip comprised of another material, that extends along a peripheral portion of said second sealing ring and abuts a sealing lip of said first sealing ring, wherein an annular spring element is disposed in an encircling recess in an outer radial facing surface of a back portion of the sealing lip of said first sealing ring, and which presses the sealing lip of said first sealing ring toward the strip of said second sealing ring.