Rotary ring and mechanical seal using the same

摘要

A rotary ring has a seal end face located at an end of the axial line direction thereof perpendicularly to the axial line and an anti-seal end face located at the other end thereof in the axial line direction, wherein the seal end face and the seal end face of a fixed ring slide each other through a subject to be sealed. The cross-sectional shape of the rotary ring is made asymmetric with respect to right and left by forming a step around the outer peripheral portion thereof so that the center of gravity of the rotary ring is located at a position nearer to the anti-seal end face than the center of the plate thickness thereof. With this arrangement, the convex deformation made to the seal end face by the deformation of the rotary ring due to heat is canceled by the concave deformation made to the seal end face by a large amount of centrifugal force acting on the anti-seal end face. Accordingly, the rotary ring exhibits a stable sealing property.