{
  "$type": "site.standard.document",
  "description": "A leaf seal effects a seal between two, coaxial, relatively rotating components (34, 134). The leaf seal has an annular pack of stacked leaves (32, 132) or a plurality of axially arranged annular packs of stacked leaves. The or each pack is mountable to one of the components with its leaves…",
  "path": "/patents/987460",
  "publishedAt": "2013-08-14T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02C7/28",
    "ROLLS ROYCE PLC [GB]"
  ],
  "textContent": "A leaf seal effects a seal between two, coaxial, relatively rotating components (34, 134). The leaf seal has an annular pack of stacked leaves (32, 132) or a plurality of axially arranged annular packs of stacked leaves. The or each pack is mountable to one of the components with its leaves extending towards the other component such that the leaf edges of the pack are presented for wiping contact with the other component. The leaf seal further has upstream and downstream coverplates (35, 35', 135, 135') at the respective axial ends of the seal. Each coverplate is spaced from the adjacent annular pack by a respective axial gap (x, x'). When viewed in the axial direction, each coverplate covers at least a portion of the radial extent of the adjacent pack. The upstream and/or the downstream coverplate is flexible to axially deflect under differential pressures which the seal experiences in operation.",
  "title": "Leaf seal"
}