| 摘要 |
A seal ring (30) for a rotatable shaft in a turbo machine includes a seal body configured for disposing around the shaft wherein a radial gap is defined between an inner surface (66) of the seal body and the shaft. An upstream surface (90) defined by the seal body extends from the inner surface, and an annular obstruction (102) extends from the upstream surface of the seal body, wherein the obstruction is spaced away from the inner surface. |
