| 摘要 |
PROBLEM TO BE SOLVED: To prevent liquid lubricant from leaking by a housing whirling. SOLUTION: This dynamic pressure bearing increases the inside diameter of the extreme inner peripheral surface 20 of a housing 1 constituting a capillary sealing part 23 from an opening 17 toward an axial deep side. Thus, in rotating the housing 1, centrifugal force acting on liquid lubricant present on the extreme inner peripheral surface 20 acts in the direction pushing the liquid lubricant into the deep side as shown in an arrow mark 19. Thus, owing to the force acting in the direction pushing the liquid lubricant into the deep side, the centrifugal force caused by the housing 1 swirling offsets force pushing out the liquid lubricant toward the outside shown in an arrow mark 29. This prevents the liquid lubricant from leakage caused by the housing 1 swirling. |
