Gas turbine generator seal system

A monolithic rubbing seal assembly for sealing a rotary regenerator in a gas turbine engine environment, said seal assembly having at least one generally semicircular, monolithic seal element, a crossarm seal element joining the ends of said semicircular seal element thereby defining a gas flow region, a housing base for said seal assembly with a general semicircular cavity and a cavity conforming generally in shape to the shape of said crossarm seal element, said cavities receiving said seal elements whereby said seal elements, together with said base, define an integral assembly, said seal elements being formed of ceramic material and each having a surface adapted to sealingy engage the adjacent surface of said regenerator, clearance between the transverse sides of said seal and the adjacent wall of said cavities and a heat resistant resilient material located between the seal elements and the base of the respective seal cavities, said resilient material engaging the transverse sides of said cavities and defining with said cavities a cooling air flow chamber in communication with a high pressure, low temperature gas region for accommodating air flow in the direction of the principal axis of said seal whereby said resilient material is cooled as said seal elements are urged pneumatically into sealing engagement with respect to said regenerator core.