ROLLER BEARING, MAIN-SHAFT SUPPORT STRUCTURE FOR WIND DRIVEN GENERATOR, AND METHOD OF ADJUSTING GAPS BETWEEN RETAINER SEGMENTS OF ROLLER BEARING

摘要

A tapered roller bearing (31) has retainer segments (11a, 11d) having pockets which house tapered rollers (34) and arranged between an outer ring (32) and an inner ring (33) so as to be sequentially continuous in the circumferential direction.  The retainer segments (11a, 11d) at least include first retainer segments and second retainer segments.  The first retainer segments have a first circumferential length, and the second retainer segments have a second circumferential length different from the first circumferential length.  When the retainer segments (11a, 11d) are circumferentially arranged without gaps in between, there is a gap (39) between a retainer segment (11a) mounted first and a retainer segment (11d) mounted last.  In room temperature, the circumferential length of the gap (39) is greater than 0.08% and smaller than 0.10% of the circumference of a circle passing through the centers of the retainer segments (11a, 11d).