MAIN SHAFT SUPPORT DEVICE FOR WIND POWER GENERATION, AND MULTIPLE ROW SELF-ALIGNING ROLLER BEARING USED FOR THIS DEVICE

摘要

PPROBLEM TO BE SOLVED: To provide a multiple row self-aligning roller bearing, and a main shaft support device using the bearing for wind power generation, which can effectively prevent the peeling on a rolling surface attributing to water infiltration, and has an excellent long-term durability. PSOLUTION: In the main shaft support device for wind power generation, the main shaft 3 is supported by at least one roller bearing 5 installed in a bearing housing 15. The roller bearing 5 comprises an inner ring 11, an outer ring 12 and a rolling element 13 disposed between the inner ring 11 and the outer ring 12. The roller bearing 5 is constituted by encasing grease around the rolling element 13. The grease is a water-resistant grease constituted by compounding an additive agent containing at least a water dispersing agent a base grease comprising a non-aqueous base oil and a thickening agent. In the compound amount of the water dispersing agent, the saturated moisture content of the water-resistant grease is an amount set to 30 to 60 wt.%. PCOPYRIGHT: (C)2008,JPO&INPIT