Grid ceramic matrix composite structure for gas turbine shroud ring segment
First Claim
1. A ceramic matrix composite component for a turbine engine comprising:
- a body made of a ceramic matrix composite (CMC) material comprising a ceramic matrix and a plurality of fibers therein;
the body comprising a base plate and a frame portion;
the frame portion comprising frame walls that are unitary with the base plate, substantially follow a perimeter of the base plate, and extend substantially normally from the base plate; and
a lattice of intersecting CMC ribs forming a grid in an area framed by the frame portion, the ribs extending substantially normally from the base plate, distal ends of at least some of the ribs intersecting the frame walls;
wherein the grid comprises an array of cells, each cell formed as a cup of CMC, the cup comprising;
a bottom wall merged or bonded with the base plate to form a rib base;
cup side walls merged or bonded with adjacent ones of the cups to form the ribs; and
wherein at least some of the cups comprise at least one perimeter attachment wall merged or bonded with at least one of the frame walls.
2 Assignments
0 Petitions
Accused Products
Abstract
A ceramic matrix composite (CMC) component such as a ring seal segment (50, 50A, 50B, 50C, 50D) for a gas turbine engine (10), the component formed with a base plate (52) and a frame portion (54) that extends substantially normally from the base plate around its perimeter. A grid of intersecting CMC ribs (73) is formed on the base plate within the frame portion. The ribs have a height (H) that may be within 3 times the total thickness (B) of the base plate, including any rib base (39) bonded to the base plate, along at least most of the rib length. The grid of ribs may be assembled from an array of CMC cups (40) bonded to the base plate, to adjacent cups, and to the frame portion.
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Citations
18 Claims
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1. A ceramic matrix composite component for a turbine engine comprising:
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a body made of a ceramic matrix composite (CMC) material comprising a ceramic matrix and a plurality of fibers therein; the body comprising a base plate and a frame portion; the frame portion comprising frame walls that are unitary with the base plate, substantially follow a perimeter of the base plate, and extend substantially normally from the base plate; and a lattice of intersecting CMC ribs forming a grid in an area framed by the frame portion, the ribs extending substantially normally from the base plate, distal ends of at least some of the ribs intersecting the frame walls; wherein the grid comprises an array of cells, each cell formed as a cup of CMC, the cup comprising; a bottom wall merged or bonded with the base plate to form a rib base; cup side walls merged or bonded with adjacent ones of the cups to form the ribs; and wherein at least some of the cups comprise at least one perimeter attachment wall merged or bonded with at least one of the frame walls. - View Dependent Claims (2, 3, 4, 5)
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6. A ceramic matrix composite component for a turbine engine comprising:
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a body made of a ceramic matrix composite (CMC) material comprising a ceramic matrix and a plurality of fibers therein; the body comprising a base plate and a frame portion; the frame portion comprising frame walls that are unitary with the base plate, substantially follow a perimeter of the base plate, and extend substantially normally from the base plate; and a lattice of intersecting CMC ribs forming a grid in an area framed by the frame portion, the ribs extending substantially normally from the base plate, distal ends of at least some of the ribs intersecting the frame walls; wherein the grid comprises an isogrid and/or orthogrid geometry; and wherein a transition between two of the frame walls occurs in a transition region, and at least 50% of the fibers adjacent to the transition region in said two frame walls span continuously across the transition region and extend into a portion of each of said two frame walls. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A gas turbine engine ring seal segment comprising:
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a ring seal segment body made of ceramic matrix composite (CMC) comprising a ceramic matrix and a plurality of fibers therein; the CMC body comprising a base plate and a generally rectangular frame portion, the base plate and the frame portion being unitary with each other; the frame portion extending substantially radially outward from the base plate, the frame portion having an upstream frame wall, a downstream frame wall, and first and second circumferential frame walls, wherein the upstream frame wall transitions into each of the first and second transverse frame walls, and wherein the downstream frame wall transitions at opposite ends into the first and second transverse frame walls; a grid of intersecting CMC ribs within the frame portion, each rib extending substantially radially outwardly from the base plate; wherein the grid intersects the frame portion at distal ends of at least some of the ribs; and wherein the transition between each of the frame walls occurs in a respective transition region, and wherein at least about 50% of the fibers in the transition region span continuously across the transition region and extend into a portion of each of the adjacent frame walls. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification