| 摘要 |
The invention provides a seal ring and a seal structure which is excellent in a quality characteristic of maintaining a stable sealing performance over a long period of time without generating a cost increase. A protruding portion (5) protruding toward a groove bottom (73) is provided in an inner peripheral surface arranged so as to face to the groove bottom (73) of an annular groove (71), in a peripheral surface of a seal ring (1), and the seal ring (1) is installed to the annular groove (71) having the groove bottom (73) provided with a notch portion (74) corresponding to the protruding portion (5), thereby regulating a relative movement between a shaft (70) and the seal ring (1). Further, a leading end portion is formed in a taper shape in both of an axial direction and a peripheral direction in the protruding portion (5), whereby a seal performance is secured even in the case that a step is generated in the groove bottom (73) due to a long-term use. |
