| abstract |
Provided are a double-row self-aligning roller bearing capable of effectively preventing separation on a rolling surface caused by water intrusion and having excellent long-term durability, and a spindle support device for wind power generation using the bearing. To do. A main shaft support device for wind power generation in which a main shaft 3 is supported by at least one rolling bearing 5 installed in a bearing housing 15, and the rolling bearing 5 includes an inner ring 11, an outer ring 12, and an inner ring. 11 and a rolling element 13 interposed between the outer ring 12 and a rolling bearing 5 in which grease is sealed around the rolling element 13. The grease is a base grease composed of a non-aqueous base oil and a thickener. A water-resistant grease comprising an additive containing at least a water dispersant, and the amount of the water dispersant is such that the saturated moisture content of the water-resistant grease is set to 30 to 60% by weight. [Selection] Figure 3 |