| 摘要 |
Provided is a sealing device that is capable of exerting a sealing performance even when a compression margin of a resinous sealing ring has decreased with time due to creep deformation. A sealing device (100) includes, a resinous sealing ring (110) on a combustion chamber side (E) provided in an annular groove (210) and an elastomeric elastic ring (120) provided on an atmosphere side (A) in the annular groove (110). The sealing ring (110) has, on its inner peripheral side, a cylindrical surface portion (112a) making intimate contact with a groove bottom of the annular groove (210) at the combustion chamber side (E) and an inclined surface portion (112b) expanding in diameter toward the atmosphere side (A) at the atmosphere side (A). The elastic ring (120) is disposed such that at least its portion is compressed between the inclined surface portion (112b) and the groove bottom of the annular groove (210) so as to press a portion of the sealing ring (110) on the atmosphere side (A) toward the outer peripheral side. |
