초록 ▼

A seal assembly for disposition between a cross arm on a gas turbine engine block and a regenerator disc, the seal assembly including a platform coextensive with the cross arm, a seal and wear layer sealingly and slidingly engaging the regenerator disc, a porous and compliant support layer between t

A seal assembly for disposition between a cross arm on a gas turbine engine block and a regenerator disc, the seal assembly including a platform coextensive with the cross arm, a seal and wear layer sealingly and slidingly engaging the regenerator disc, a porous and compliant support layer between the platform and the seal and wear layer porous enough to permit flow of cooling air therethrough and compliant to accommodate relative thermal growth and distortion, a dike between the seal and wear layer and the platform for preventing cross flow through the support layer between engine exhaust and pressurized air passages, and air diversion passages for directing unregenerated pressurized air through the support layer to cool the seal and wear layer and then back into the flow of regenerated pressurized air.

대표청구항 ▼

In a gas turbine engine having block means defining a pressurized air passage and a hot exhaust gas passage and a cross arm partition separating portions of said air and said exhaust passages, a regenerator disc on said block means intersecting said air and said exhaust passages and rotatable to tra

In a gas turbine engine having block means defining a pressurized air passage and a hot exhaust gas passage and a cross arm partition separating portions of said air and said exhaust passages, a regenerator disc on said block means intersecting said air and said exhaust passages and rotatable to transfer heat from said exhaust gas to said pressurized air and including an inboard surface, and rim seal means between said disc inboard surface and said block means operative to prevent pressurized air and exhaust gas leakage around the periphery of said disc, an improved cross arm seal assembly comprising, a platform generally coextensive with said cross arm partition disposed between the latter and said disc inboard surface, a porous and compliant support layer on a surface of said platform facing said disc inboard surface, a seal and wear layer on said support layer defining a barrier to gas passage and sealingly engaging said disc inboard surface, dike means between said seal and wear layer and said platform preventing communication through said support layer between said air and said exhaust passages, seal means between said platform and said cross arm partition preventing communication between said air and said exhaust passages across said cross arm partition, and means on said block means and on said platform operative to direct air from said pressurized air passage to and through said support layer thereby to cool said seal and wear layer.