DOUBLE-ROW SELF-ALIGNING ROLLER BEARING AND WIND POWER GENERATION ROTOR SHAFT SUPPORT DEVICE HAVING THE SAME

摘要

To provide a double-row self-aligning roller bearing and a wind power generation rotor shaft support device having the double-row self-aligning roller bearing being capable of preventing frictional wear on a lubrication surface even when being brought into contact with another member under a condition of an inferior lubrication state causing sliding and thereby being superior in long term durability. A double-row self-aligning roller bearing 5 has a hard film 18 including a foundation layer formed directly on a sliding contact surface of at least one bearing component selected from among an inner ring 11, an outer ring 12, and rollers 13a and 13b, a mixed layer formed on the foundation layer and mainly formed of WC and DLC, and a surface layer formed on the mixed layer and mainly formed of DLC. The hard film 18 is used to be brought into sliding contact with other bearing component in a boundary lubrication state. The content of hydrogen in the mixed layer is less than 10 atom %.