Sealing assembly.

摘要

A sealing assembly (4) is used to seal the gap between the two member (1, 2) that move relative to each other. It includes first and second rings (5, 6) provided in a groove (3) formed in one of the members. A portion of the outer peripheral surface of the first ring (5) is in contact with the other member. None of the surfaces of the second ring (6) makes contact with the other member. The second ring (6) engages with the portion of the first ring (5) which is not in contact with the other member. The second ring (6) has a coefficient of thermal expansion smaller than that of the first ring (5). When the first ring (5) expands due to the heat generated by the slide of the first ring (5) against the other member, the expansion of the first ring (5) is limited by the second ring (6).