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
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Patent
Coating for isolating metallic components from composite components
TL;DR: In this article, a barrier coating for isolating a metallic support component from a composite component in a gas turbine engine is provided, where the barrier is applied to the composite component so that when the ceramic component is mounted on the metal support component, the barrier coating is engaged.
Patent
Turbine shroud with forward case and full hoop blade track
TL;DR: A gas turbine engine includes a turbine shroud assembly arranged around a turbine wheel assembly as discussed by the authors, which includes an annular turbine case, a blade track, and a forward case, and the forward case is coupled to the turbine case and is arranged to block axial movement of the blade track relative to turbine case.
Patent
Gussets for Strengthening CMC Fillet Radii
Jay A. Morrison,Gary B. Merrill +1 more
TL;DR: In this paper, a CMC structure with first and second CMC walls joined at an intersection containing continuous fibers is described, and a gusset is formed in the intersection by an inward bending of some or all ceramic fibers.
Patent
Pressure activated seals for a gas turbine engine
TL;DR: An assembly for use in a gas turbine engine is described in this article, which includes a first component arranged adjacent to a second component to form a gap there between and a pressure activated seal that resists flow through the gap.
Patent
Turbine shroud with hanger attachment
TL;DR: In this paper, the authors describe a turbine shroud segment for blocking gasses from passing over turbine blades included in a gas turbine engine, including a mounting system for coupling the supported component to the carrier component and a seal adapted to resist the movement of gasses.
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.