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A ceramic blade assembly including a corrugated-metal partition situated in the space between the ceramic blade element and the post member, which corrugated-metal partition forms a compliant layer for the relief of mechanical stresses in the ceramic blade element during aerodynamic and thermal load

A ceramic blade assembly including a corrugated-metal partition situated in the space between the ceramic blade element and the post member, which corrugated-metal partition forms a compliant layer for the relief of mechanical stresses in the ceramic blade element during aerodynamic and thermal loading of the blade and which partition also serves as a means for defining contiguous sets of juxtaposed passages situated between the ceramic blade element and the post member, one set being open-ended and adjacent to exterior surfaces of the post member for directing cooling fluid thereover and the second set being adjacent to the interior surfaces of the ceramic blade element and being closed-off for creating stagnant columns of fluid to thereby insulate the ceramic blade element from the cooling air.

대표청구항 ▼

A ceramic blade assembly suitable for attachment to a turbine rotor hub comprising a disk having a plurality of shaped slots along the periphery of said disk for receiving individual turbine blades, said ceramic blade assembly comprising: a base element comprising means for affixing said base elemen

A ceramic blade assembly suitable for attachment to a turbine rotor hub comprising a disk having a plurality of shaped slots along the periphery of said disk for receiving individual turbine blades, said ceramic blade assembly comprising: a base element comprising means for affixing said base element to said turbine rotor hub at said slots, a platform portion affixed to said engagement means, said platform portion having rim means for defining a recess in said platform for receiving the footing of a blade element, said defined recess having a floor, and a post member affixed to and extending from said floor of said platform portion, said post member having a post-root, a tip and exterior surfaces; a ceramic blade element comprising an airfoil shaped body having interior surfaces for defining an internal span-wise channel for receiving said post member and rim means for defining a footing for engagement with said rim means of said base element, said ceramic blade element being positioned about said post member so that said interior surfaces are at least partly set apart from said exterior surfaces of said post member and so that said ceramic blade element is set apart from said floor of said platform portion to define a peripheral channel about said post-root; a cap means affixed to said tip of said post member, said cap having at least one bearing surface for retaining said ceramic blade element in position about said post member; at least one resilient corrugated partition positioned between and in contact with said interior and exterior surfaces, said resilient corrugated partition defining contiguous sets of juxtaposed passages situated between said ceramic blade element and said post member, said sets of passages being in communication with said peripheral channel and said sets including a first set of passages open to said exterior surfaces of said post member and a second set of passages open to said interior surfaces of said ceramic blade element; means for supplying cooling fluid to said first set of passages through said peripheral channel; means for exiting said cooling fluid from said first set of passages at said tip; and means for forming columns of stagnated fluid within said second set of passages to insulate said ceramic blade element.