DOUBLE-ROW SELF-ALIGNING ROLLER BEARING AND DEVICE FOR SUPPORTING WIND TURBINE GENERATOR MAIN SHAFT

摘要

A double-row self-aligning roller bearing used for applications, such as a device for supporting a wind turbine generator main shaft, where a thrust load is received at either of the rows. A load is appropriately supported at each row depending on the magnitude of the load, and this extends real life. Further, the bearing is economical because materials are used in a waste-less manner. Double row rollers (4, 5) are interposed between an inner ring (2) and an outer ring (3). A raceway surface (3a) of the outer ring (3) has a spherical shape, and the outer diameter surfaces of rollers (4, 5) are shaped so as to match a raceway surface (3a) of the outer ring (3). The rollers (4, 5) in the left and right rows have different lengths (L1, L2), and contact angles theta1, theta2 in the left and right rows are different.