ROLLER BEARING FOR WIND TURBINES

A self aligning bearing assembly comprising a split inner ring and a split outer ring, and two rows of rolling elements arranged at different contact angles, for supporting a main shaft of a wind turbine. 1. A bearing assembly for supporting a main shaft of a wind turbine comprising: a first section having a bearing raceway on an inner radial surface;', 'a second section having a bearing raceway on an inner radial surface; and', 'a plurality of fasteners joining the first and second sections such that a continuous bearing raceway is formed from the first and second section bearing raceways;, 'a split outer ring comprising;'} a first section having a bearing raceway on an outer radial surface;', 'a second section having a bearing raceway on an outer radial surface; and', 'a plurality of fasteners joining the first and second sections such that a continuous bearing raceway is formed from the first and second section bearing raceways;, 'a split inner ring comprising;'}a first row of rolling elements retained by a first cage;a second row of rolling elements retained by a second cage;all of the first row of rolling elements having the same length as all of the second row of rolling elements; andthe first row of rolling elements arranged at a different contact angle from the second row of rolling elements2. The bearing assembly of claim 1 , wherein the second row of rolling elements has a greater contact angle than the first row of rolling elements.3. The bearing assembly of claim 2 , wherein the second row of rolling elements is arranged remote from the blade rotor.4. The bearing assembly of claim 1 , wherein the first row of rolling elements and the second row of rolling elements are separated by a floating spacer. Example aspects described herein relate to bearing assemblies, particularly of self-aligning bearings for wind turbine applications.Bearing assemblies are typically circular in shape, and generally comprise rolling elements sandwiched between raceways in ...