Reinforced bearing for a wind-power generator blade
View Patent ↗Mounting arrangement of the blades on the hub ( 5 ) of a wind power turbine comprising a bearing ( 11 ) between each blade root ( 13 ) and the corresponding hub connection ( 15 ) having an inner ring ( 25 ) and an outer ring ( 23 ) with a stiffening plate ( 33 ) attached at least on a part of the outer ring ( 23 ), preferably in a perpendicular plane to the blade axis, on the opposed side ( 29 ) to the side ( 37 ) joined to the hub connection ( 15 ).
1. A mounting arrangement of blades on a hub ( 5 ) of a wind power turbine comprising a bearing ( 11 ) between each blade root ( 13 ) and a corresponding hub connection ( 15 ) having an outer ring ( 23 ) and an inner ring ( 25 ), wherein said inner ring ( 25 ) has reinforcing plates ( 30 , 31 ) of thickness T 2 and T 3 for minimizing its deflection, and said arrangement further comprises a stiffening plate ( 33 ) of thickness T 1 attached at least on a part of the outer ring ( 23 ) on a side ( 29 ) opposed to a side ( 37 ) joined to the hub connection ( 15 ) so that the stiffness of the upper and lower surfaces of the bearing ( 11 ) is equalized.
2. The mounting arrangement of the blades on the hub ( 5 ) of a wind power turbine according to claim 1 , wherein said stiffening plate ( 33 ) is placed in a perpendicular plane to the blade axis.
3. The mounting arrangement of the blades on the hub ( 5 ) of a wind power turbine according to claim 1 , wherein the stiffening plate ( 33 ) is attached to the outer ring ( 23 ) along the half outer ring ( 23 ) perimeter oriented towards the wind.
4. The mounting arrangement of the blades on the hub ( 5 ) of a wind power turbine according to claim 3 , wherein the stiffening plate ( 33 ) width W is variable along its length.
5. The mounting arrangement of the blades on the hub ( 5 ) of a wind power turbine according to claim 4 , wherein the stiffening plate ( 33 ) has its maximum width value Wmax along a hypothetical outer ring ( 23 ) diametral axis parallel to the rotor axis and a symmetrical decreasing width W towards both sides of said diametral axis.
6. The mounting arrangement of the blades on the hub ( 5 ) of a wind power turbine according to claim 1 , wherein the stiffening plate ( 33 ) is attached to the outer ring ( 23 ) along its full perimeter.
7. The mounting arrangement of the blades on the hub ( 5 ) of a wind power turbine according to claim 6 , wherein the stiffening plate ( 33 ) portion of larger width W is a portion located on the half outer ring ( 23 ) oriented towards the wind.
8. The mounting arrangement of the blades on the hub ( 5 ) of a wind power turbine according to claim 1 , wherein the stiffening plate ( 33 ) includes a plurality of bolt-holes ( 49 ) for its attachment to the outer ring ( 23 ).
9. The mounting arrangement of the blades on the hub ( 5 ) of a wind power turbine according to claim 1 , wherein the bearing ( 11 ) between each blade root ( 13 ) and the corresponding hub connection ( 15 ) is a rolling bearing.
10. The mounting arrangement of the blades on the hub ( 5 ) of a wind power turbine according to claim 1 , wherein the bearing ( 11 ) between each blade root ( 13 ) and the corresponding hub connection ( 15 ) is a ball bearing.