| 摘要 |
<p>A seal ring having a more stable torque reduction effect. A seal ring is adapted to seal the annular gap between a housing and a shaft which is inserted through the shaft hole of the housing, the housing and the shaft being provided so as to be rotatable relative to each other. The seal ring is mounted in an annular groove provided in the shaft, is configured so that the seal ring is pressed, by the pressure of fluid to be sealed, against a side surface of the annular groove and against the inner peripheral surface of the shaft hole, and has a recess (14) provided in the slide region of the seal ring which slides on the side surface of the annular groove, the recess (14) being separated from the side surface of the annular groove so that a force acting against the force which presses the seal ring against the side surface of the annular groove by the effect of the pressure is generated. The recess (14) comprises: a circular arc section (14a) which extends in the circumferential direction on the inner side of the slide region; and an introduction section (14b) which, in order to introduce the fluid to be sealed to the circular arc section (14a), extends from the end of the slide region which is adjacent to a region (O) to be sealed to the end of the circular arc section (14a) which is on the upstream side of the direction of the flow of the fluid to be sealed.</p> |
