DOUBLE-ROW SELF-ALIGNING ROLLER BEARING AND MAIN SHAFT SUPPORT DEVICE FOR WIND GENERATION EQUIPPED WITH SAME

摘要

Provided are a double-row self-aligning roller bearing and a main shaft support device for wind generation equipped with this roller bearing, wherein frictional wear of a lubrication surface is prevented even when contacting another member under conditions accompanying slipping in a state of poor lubrication, thereby achieving excellent long-term durability. In the double-row self-aligning roller bearing 5 a hard film 18 is a film having structure comprising an underlayer formed directly on a sliding surface of at least one bearing member selected from an inner ring 11, an outer ring 12, and rollers 13a and 13b, a mixed layer formed on the underlayer and mainly comprising WC and DLC, and a surface layer formed on the mixed layer and mainly comprising DLC. The hard layer 18 is used under a condition of sliding contact with another bearing member, with boundary lubrication, and the hydrogen content of the mixed layer is less than 10 at%.