| 摘要 |
<p>A regenerator cross arm seal structure for a rotary regenerator of a gas turbine engine includes a cross arm seal extending diametrically of a matrix of the rotating regenerator which includes a center bore therein for a drive bushing and spindle; the seal having a leaf spring on one surface thereof that is engageable with an engine block support platform to seal between the engine block and one surface of a seal platform that supports a cross arm wear face with a hub section cooled by leakage of air through the center bore and the seal wear face including a material with low friction and good wear characteristics when operating at elevated temperatures between 1000 DEG F. to 1500 DEG F. (523 DEG C. to 800 DEG C.) and wherein the cooling effect of air leakage through the hub is counteracted by hot gas circulation through hot gas passages in the wear surface at the hub section thereof sized to allow pressure drop from the hot gas sides of the matrix to the cold gas side thereof to pump hot gas across the inboard seal assembly hub section to maintain it within a desired elevated temperature range for maintaining low friction and reduced wear thereon.</p> |
