| 摘要 |
PROBLEM TO BE SOLVED: To improve high-speed limit by an oil air lubrication method.SOLUTION: A rolling bearing device includes: a rolling bearing having an inner ring and an outer ring, a plurality of rolling elements arranged rollably between the inner ring and the outer ring, and a cage arranged between the inner ring and the outer ring, the cage holding the rolling elements; and an outer ring spacer 4 which is arranged being adjacent to the rolling bearing in an axial direction and in which an oil supply passage 19 in which oil air circulates is formed. The oil supply passage 19 has: jetting ports 19c1, 19d1 for supplying oil by jetting the oil air between the inner ring and the outer ring. A jetting direction of the oil air from the jetting ports 19c1, 19d1 is inclined with respect to a virtual plane 23 including a center line 4b of the outer ring spacer 4 and the oil supply passage 19. |
