| 摘要 |
<p>A leaf seal for sealing between a static component and a relatively rotating component having an axis of rotation is provided. The leaf seal defines axially separated higher and lower pressure areas within the static component. The leaf seal comprises a plurality of leaf elements having: a root end for attachment to the static component; a free end for wiping contact with the rotating component; an upstream edge extending from the root end to the free end; and, a downstream edge extending from the root end to the free end. The leaf element width between the upstream edge and downstream edge at the root end is a, and width between the upstream edge and the downstream edge at the free end is b, where b<0.5a. Each leaf element may be of rounded cross section and include a triangular or v-shaped aperture for pressure equalisation with fluid connection to an external pressure source and at least one labyrinth tooth.</p> |
