| 摘要 |
PROBLEM TO BE SOLVED: To prevent clogging without roughening a filter which is arranged at a seal ring.SOLUTION: A filter 13 is formed of a plurality of filtration holes 14 penetrating a seal ring 6. A hole surrounding part 15 surrounding the filtration holes 14 out of a surface of the seal ring 6 at the outside of a bearing is formed into a three-dimensional shape which is protruded in a tapered shape toward the outside of the bearing. By this constitution, foreign matters hung at a tip edge of the hole surrounding part 15 are easily removed from sideways of inlets of the filtration holes 14. Furthermore, an external peripheral part 20 for inducing a flow for disturbing an approach of a lubricant to the inlets of the filtration holes 14, and a vane 30 for generating a vortex in the vicinity of the inlets of the filtration holes 14 are arranged at an annular member 10 which is attached to an inner ring 2 that is a rotating ring, and the foreign matters thereby hardly remain at the inlets of the filtration holes 14.SELECTED DRAWING: Figure 1 |
