Patent
Ceramic matrix composite component for a gas turbine engine
TLDR
In this article, the gap between the CMC member and the support member is kept purposefully small to limit the stress developed in the material when it is deflected against the support by the force of a rubbing blade tip.Abstract:
A ceramic matrix composite (CMC) component for a combustion turbine engine ( 10 ). A blade shroud assembly ( 30 ) may be formed to include a CMC member ( 32 ) supported from a metal support member ( 32 ). The CMC member includes arcuate portions ( 50, 52 ) shaped to surround extending portions ( 46, 48 ) of the support member to insulate the metal support member from hot combustion gas ( 16 ). The use of a low thermal conductivity CMC material allows the metal support member to be in direct contact with the CMC material. The gap ( 42 ) between the CMC member and the support member is kept purposefully small to limit the stress developed in the CMC member when it is deflected against the support member by the force of a rubbing blade tip ( 14 ). Changes in the gap dimension resulting from differential thermal growth may be regulated by selecting an angle (A) of a tapered slot ( 76 ) defined by the arcuate portion.read more
Citations
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Patent
Dovetail retention system for blade tracks
Ted J. Freeman,Joseph P. Lamusga +1 more
TL;DR: In this article, a turbine shroud is formed from a plurality of blade track segments, including dovetail posts (61, 62), which are inserted through apertures (91, 92) in the support ring.
Patent
Ring seal for a turbine engine
TL;DR: A turbine engine ring seal for sealing gaps between turbine engine outer seal segments and turbine blade tips was proposed in this paper, where the inner radial surface was formed of an abradable ceramic coating and included a plurality of gas flow protrusions that are oriented transverse to the gap gas flow path.
Patent
Stacked laminate bolted ring segment
Malberto F. Gonzalez,David C. Radonovich,Anthony L. Schiavo,Jay A. Morrison,Steven James Vance +4 more
TL;DR: In this paper, a ring segment for a turbine engine that can be used as a replacement for one or more metal components is proposed to take advantage of the properties provided by ceramic materials.
Patent
CMC component and method of fabrication
TL;DR: In this article, an airfoil is formed of a plurality of pre-fire structural CMC panels, each of which has an open shape having opposed ends that are free to move during the drying, curing and/or firing of the CMC material in order to minimize interlaminar stresses caused by anisotropic sintering shrinkage.
Patent
Shroud hanger assembly
TL;DR: In this article, a shroud hanger assembly is provided for a gas turbine engine with a retainer that engages a pocket formed in a shroud (50) so as to retain the shroud in a desired position relative to the hanger (32).
References
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Patent
Use of high temperature insulation for ceramic matrix composites in gas turbines
TL;DR: In this article, a ceramic composition for insulating components, made of ceramic matrix composites, of gas turbines is provided, which comprises a plurality of hollow oxide-based spheres of various dimensions, a phosphate binder, and at least one oxide filler powder, whereby the binder partially fills gaps between the spheres and the filler powders.
Patent
Turbine ring for a gas turbine engine
TL;DR: A turbine ring has an annular metallic carrier which is mounted within the inside of the turbine casing and within the carrier there is provided a ceramic abradable ring as mentioned in this paper, and a cooling air circuit is provided to regulate the temperature of only the annular carrier such that the latter always exerts a centripetal compression force on the ring under all operational conditions of the gas turbine.
Patent
Turbine ring incorporating elements of a ceramic composition divided into sectors
TL;DR: In this paper, a turbine ring comprises an annular support in two parts and a ring of ceramic sectors for sealing purposes, which are interconnected by an axial groove and a sliding male part.
Patent
Ceramic faced outer air seal for gas turbine engines
Eaton Harry Edwin,Richard Novak +1 more
TL;DR: In this article, the ceramic facing material of an outer air seal (30) at the leading edge region (36) is densified by a plasma gun to produce a glazed area (52) which is resistant to erosion.
Patent
Turbine blade shroud assembly
TL;DR: In this paper, a turbine blade shroud assembly for a gas turbine engine includes a metal substrate ring on the engine, a continous ceramic barrier ring inside the substrate ring and exposed to hot gas in a hot gas flow path of the engine and a wire mesh compliant ring between the barrier and substrate rings.