| 摘要 |
An intershaft seal assembly (11) for counter-rotating and co-rotating turbine engines is presented. The seal assembly (11) includes a pair of end rings (13, 14) and a seal element (12). At least one end ring (13, 14) has a flange (18, 21), with upper and lower surfaces (45, 46, 29, 30), disposed along and extending from one side of the ring (13, 14). The seal element (12) includes a ring (24), with outer surface (27), and a ring flange (25) wider than the ring (24). The ring flange (25) is disposed along and extends diametrically from the outer surface (27), the latter also contacting the lower surface (29, 30) along at least one flange (13, 14). The seal element (12) is disposed between the end rings (13, 14) so that the ring flange (25) extends beyond the flanges (18, 21). The invention avoids the wear and heating problems inherent to intershaft seal systems, thus allowing the seal element (12) to be composed of a temperature resistant metal, metal alloy, or carbon graphite. |
