Cap for ceramic blade tip shroud
A ceramic shroud assembly (99) includes a tip shroud (88) having an outer platform (86) supporting at least one seal tooth (91), a shroud cap (96) less brittle than the outer platform (86) and including a shroud cap base (98) on the outer platform (86), and clockwise and counter-clockwise facing clo...
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Main Authors | , , , , |
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Format | Patent |
Language | English French German |
Published |
20.03.2019
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Subjects | |
Online Access | Get full text |
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Summary: | A ceramic shroud assembly (99) includes a tip shroud (88) having an outer platform (86) supporting at least one seal tooth (91), a shroud cap (96) less brittle than the outer platform (86) and including a shroud cap base (98) on the outer platform (86), and clockwise and counter-clockwise facing clockwise and counter-clockwise contact surfaces (152, 153) located at clockwise and counter-clockwise distal ends (124, 126) respectively of the base. A rotor (34) assembly may include a circumferential row (38) of turbine blades (70) made of a ceramic material and extending radially outwardly from a disk (73) of a turbine rotor (34). The turbine blades (70) include airfoils (72) having the airfoil tip shrouds (88) and the shroud caps (96) at blade tips (77). The clockwise and counter-clockwise contact surfaces (152, 153) of circumferentially adjacent ones (71) of the shroud caps (96) contact each other. The shroud (88) and the platform (86) may be made of a ceramic or ceramic matrix composite material and the shroud cap (96) may be made of a metallic material. |
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Bibliography: | Application Number: EP20120178383 |