Patents Assigned to SNECMA Propulsion Solide
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Patent number: 9416059Abstract: A part made of a porous material containing carbon, in particular a C/C composite material, is protected against oxidation by being impregnated with a composition in an aqueous medium containing at least a phosphorous compound, elemental titanium, and boron or a boron compound other than titanium diboride, to form in the presence of oxygen and at least one alkali or alkaline-earth element M that catalyzes oxidation of carbon, at least one P—O—Ti-M type association bonded by boron oxide B2O3 and trapping the element M.Type: GrantFiled: November 28, 2006Date of Patent: August 16, 2016Assignee: Snecma Propulsion SolideInventors: Pascal Diss, Eric Lavasserie
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Patent number: 9126873Abstract: In order to provide a self-healing layer on a composite material part, a composition is applied to the part, the composition containing: a suspension of colloidal silica; boron or a boron compound in powder form; silicon carbide in powder form; and at least one ultra-refractory oxide.Type: GrantFiled: June 5, 2009Date of Patent: September 8, 2015Assignee: SNECMA PROPULSION SOLIDEInventors: Pascal Diss, Eric Lavasserie
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Patent number: 9022733Abstract: A turbine nozzle element including an inner annular platform sector, an outer annular platform sector, and at least one vane extending between the platform sectors and connected to both of them. The nozzle element includes a single piece of composite material including fiber reinforcement densified by a matrix that is at least partially ceramic, and the fiber reinforcement includes a fiber structure that is woven by three-dimensional or multi-layer weaving, and that presents continuity throughout the volume of the nozzle element and throughout the periphery of the vane.Type: GrantFiled: June 9, 2010Date of Patent: May 5, 2015Assignees: SNECMA, SNECMA Propulsion SolideInventors: Dominique Coupe, Guillaume Jean-Claude Robert Renon
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Publication number: 20140299654Abstract: A setup for assembling, by brazing, a composite panel including at least two parts separated by a filler material and joined together by brazing. The setup includes a furnace to achieve a brazing temperature for brazing the panel, and an assembly device which has a form having a shape similar to the final shape of the panel to be brazed. In particular, the assembly device further includes a pressing device to apply mechanical pressure to at least part of the surface of the panel in a direction allowing the panel to be permanently deformed into a shape which matches that of the form. The pressing device is moved under the action of a spring, and the forces applied by the spring being determined so that, at the brazing temperature, the spring applies the force necessary for deforming the panel against the form.Type: ApplicationFiled: May 12, 2014Publication date: October 9, 2014Applicants: AIRCELLE, SNECMA PROPULSION SOLIDEInventors: Hélène MALOT, Philippe Bienvenu, Frédéric Guichard, Olivier Drevet
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Patent number: 8685868Abstract: A reinforcing fiber structure woven as a single piece for fabricating a composite material part, the fiber structure having an internal portion or core (72), and a portion adjacent to an outside surface of the structure, or skin (74, 76), and the fiber structure being formed by a three-dimensional weaving in its core using at least one weave selected from an interlock weave and a multilayer weave, and by weaving at its skin with a weave of satin type that is different from the weave in the core the weaving at the skin being of the multilayer type or of the two-dimensional type.Type: GrantFiled: June 21, 2006Date of Patent: April 1, 2014Assignees: SNECMA, SNECMA Propulsion SolideInventors: Eric Bouillon, Francois Charleux, Dominique Coupe, Bruno Dambrine, Jean Noel Mahieu
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Patent number: 8615877Abstract: A fiber preform is obtained by conforming panels of fiber texture on a former having a surface that reproduces the shape desired for a surface of the nozzle or the nozzle divergent section that is to be made. The panels are bonded together via their mutually contacting edges. A consolidated fiber reinforcement is formed by shaping the fiber preform impregnated with a consolidation composition including a resin. The shaping of the fiber preform is performed between the former and a jacket applied against the impregnated fiber preform so as the consolidated fiber reinforcement has a fiber volume percentage of at least 35%, and a thickness of less than 5 mm over at least a major fraction of its axial dimension. The densification of the fiber reinforcement is continued by chemical vapor infiltration after pyrolyzing the resin so that once densified, a part is obtained that has practically the shape and the wall thickness of the nozzle or the nozzle divergent section that is to be made.Type: GrantFiled: July 13, 2009Date of Patent: December 31, 2013Assignee: Snecma Propulsion SolideInventors: François Charleux, Jean-Marie Parenteau, Bernard Delperier
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Patent number: 8590316Abstract: The invention relates to a mixer (100) for a separate-stream nozzle of a turbojet, the mixer being designed to mix a hot inner stream from the combustion chamber of the turbojet with a cold outer stream from the fan of the turbojet. The mixer comprises an inner shroud (120) defining a flow channel for said hot inner stream, an outer shroud (110) disposed around the inner shroud (120) and co-operating therewith to define a flow channel for said cold outer stream, and a lobed structure (130) having lobes (1321, 1322) extending longitudinally from the trailing edges (110a, 120a) of said shrouds. The lobed structure (130) is made of a ceramic matrix composite material and is attached to the outer shroud (110) by flexible fastener tabs (140).Type: GrantFiled: April 8, 2008Date of Patent: November 26, 2013Assignee: SNECMA Propulsion SolideInventors: Eric Conete, Benoît Carrere, Laurent Baroumes
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Patent number: 8584356Abstract: A method of fabricating a lobed structure for a gas turbine flow mixer having an annular upstream portion extended downstream by a portion forming a multilobed skirt, the method comprising: making a fiber preform (100) out of refractory fibers and having a shape corresponding to the shape of the lobed structure to be fabricated, from a plurality of component elements of fiber texture that are assembled together and shaped by means of tooling of a shape corresponding to the shape of the lobed structure to be fabricated so as to obtain an assembled fiber preform having a first preform portion (111) corresponding to the annular portion of the lobed structure and a second preform portion (112) corresponding to the multilobed skirt of the lobed structure, the component elements of the fiber preform being assembled together at least in part along connection lines (121) extending substantially in the flow direction of the flow past the lobes of the multilobed skirt preform portion; and densifying the assembled anType: GrantFiled: February 11, 2008Date of Patent: November 19, 2013Assignee: Snecma Propulsion SolideInventors: Eric Philippe, Jean-Daniel Lalanne, Pascal Ducharlet, Dominique Coupe
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Patent number: 8529995Abstract: A method of fabricating a thermostructural composite material part includes making a fiber preform formed of yarns or tows and impregnated by a consolidating composition containing a carbon- or ceramic-precursor, transforming the carbon- or ceramic-precursor by pyrolysis, and then densifying the preform by chemical vapor infiltration. A consolidating composition is used that additionally contains refractory solid fillers in the powder form presenting mean grain size less than 200 nanometers and leaving, after pyrolysis, a consolidated solid phase in which the carbon or the ceramic derived from the precursor occupies a volume representing 3% to 10% of the apparent volume of the preform, and the solid fillers occupy a volume representing 0.5% to 5% of the apparent volume of the preform.Type: GrantFiled: September 23, 2009Date of Patent: September 10, 2013Assignee: Snecma Propulsion SolideInventors: Nicolas Eberling-Fux, Eric Bouillon, Eric Philippe, Henri Tawil
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Patent number: 8505884Abstract: A packing structure according to the invention for a fluid contacting column forms a volume comprising an ordered arrangement of bundles of tubes of diameter ranging between 5 and 50 mm. The walls of the tubes comprise orifices which promote circulation and mixes fluids in the structure. The orifices are inscribed in rectangles whose sides range between 2 and 45 mm, and each one of the orifices extends over a surface area greater than 2 mm2.Type: GrantFiled: March 19, 2008Date of Patent: August 13, 2013Assignees: IFP Energies nouvelles, Snecma Propulsion SolideInventors: Pascal Alix, Rémi Bessettes, Charles Dumont, Jean-Pierre Maumus, Ludovic Raynal
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Patent number: 8505588Abstract: A method of making a fiber structure by multilayer three-dimensional weaving, the fiber structure having a thickness in a direction perpendicular to the warp and weft directions that varies along the warp direction while conserving the same number of warp yarns that are woven at all points of the fiber structure along the warp direction, wherein during a transition in the warp direction from a first portion of the fiber texture to a second portion of the fiber texture having a thickness that is greater than the thickness of the first portion, the number of warp planes is decreased and the number of layers of warp yarns is increased without changing the number of warp yarns, by constituting at least one warp plane in the second portion with warp yarns taken from at least two different warp planes in the first portion.Type: GrantFiled: November 20, 2009Date of Patent: August 13, 2013Assignee: SNECMA Propulsion SolideInventors: Dominique Coupe, Eric Bouillon, Bruno Dambrine
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Patent number: 8496431Abstract: A turbine ring assembly for a gas turbine, the assembly having a complete ring forming a single piece of ceramic matrix composite material (CMC), a metal structure for supporting the CMC ring having metal annular supports between which the CMC ring is placed while allowing differential expansion at least in a radial direction between the CMC ring and the annular supports, an arrangement for centering the CMC ring, and at least one element for preventing turning of the CMC ring about its axis.Type: GrantFiled: March 14, 2008Date of Patent: July 30, 2013Assignee: Snecma Propulsion SolideInventors: Georges Habarou, Julien Mateo, Eric Bouillon
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Patent number: 8491963Abstract: To densify thin porous substrates (1) by chemical vapor infiltration, the invention proposes using loading tooling (10) comprising a tubular duct (10) disposed between first and second plates (12, 13) and around which the thin substrates for densification are disposed radially. The tooling as loaded in this way is then placed inside a reaction chamber (20) in an infiltration oven having a reactive gas admission inlet (21) connected to the tubular duct (11) to enable a reactive gas to be admitted into the duct which distributes the gas along the main faces on the substrates (1) in a flow direction that is essentially radial. The reactive gas can also flow in the opposite direction, i.e. it can be admitted into the tooling (10) from its outer envelope (16) and can be removed via the duct (11).Type: GrantFiled: March 14, 2012Date of Patent: July 23, 2013Assignee: Snecma Propulsion SolideInventors: Franck Lamouroux, Sébastien Bertrand, Stéphane Goujard, Alain Caillaud, Francis Bagilet, Stéphane Mazereau
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Patent number: 8455103Abstract: An environmental barrier is formed on a substrate (10) of ceramic matrix composite material and comprises an outer anticorrosion protection layer (12) containing a compound of the type comprising an aluminosilicate of an alkali, or an alkaline-earth, or a rare-earth element. A bond sub-layer (14) is formed between the substrate (10) and the protection layer (12), the composition of the bond sub-layer varying from substantially pure silicon to substantially pure mullite between an inner face beside the substrate and an outer face, with the silicon content decreasing and the mullite content increasing.Type: GrantFiled: April 3, 2007Date of Patent: June 4, 2013Assignee: SNECMA Propulsion SolideInventors: Caroline Louchet-Pouillerie, Eric Bouillon, Henri Tawil, Gérard Gueldry, Rémi Bouvier
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Patent number: 8426326Abstract: A fiber reinforcing texture woven as a single part for fabricating a composite material part having an inner portion, or core, made by three-dimensional weaving with yarns made up from discontinuous fibers, and a portion adjacent to an outside surface, or skin, made by weaving with yarns made up from continuous filaments.Type: GrantFiled: June 12, 2012Date of Patent: April 23, 2013Assignee: Snecma Propulsion SolideInventors: Eric Bouillon, François Charleux, Caroline Louchet-Pouillerie, Rémi Bouvier, Dominique Coupe
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Patent number: 8424312Abstract: The invention relates to an exhaust system (100) for channeling the streams from a by-pass gas turbine, the system comprising a stream channeling nozzle and an exhaust casing (110) for connecting the channeling nozzle to the outlet of the gas turbine, said channeling nozzle comprising a primary nozzle (120) fastened to the exhaust casing (110) and a secondary nozzle (130) placed around the primary nozzle. The exhaust system further comprises means for fastening the secondary nozzle (130) directly to the exhaust casing (110), said secondary nozzle being supported by the exhaust casing independently of the primary nozzle (120).Type: GrantFiled: May 7, 2008Date of Patent: April 23, 2013Assignee: Snecma Propulsion SolideInventors: Eric Conete, Laurent Baroumes, Georges Habarou
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Patent number: 8357423Abstract: The invention relates to a method of making a refractory carbide layer on the accessible surface of a C/C composite material, the method including a step consisting in placing the composite material in contact with a reactive composition in solid form that contains an atomic proportion greater than or equal to one-third and less than or equal to 95% of a metal that is a precursor of a determined carbide having a melting temperature greater than 2000° C., and an atomic proportion of silicon that is greater than or equal to 5% and less than or equal to two-thirds. The method further includes a step consisting in impregnating the accessible surface of the C/C composite material with the reactive composition melted at a temperature that is greater than or equal to the melting temperature of the metal that is a precursor of a determined carbide.Type: GrantFiled: December 12, 2008Date of Patent: January 22, 2013Assignees: Snecma Propulsion Solide, Centre National de la Recherche ScientifiqueInventors: Jacques Thebault, Christian Robin-Brosse, Aurélie Quet, René Pailler
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Publication number: 20120308391Abstract: A layout of a blisk includes two inserts housed between the bulb of the blade and the wall of a groove in a disk to compensate for variations in inclination between the overhanging faces of the groove and the upper faces of the bulb at their central part. This construction makes it possible to select blades for which upper faces of the bulb are slightly inclined relative to the radial direction, which facilitates their construction from a composite material.Type: ApplicationFiled: January 11, 2011Publication date: December 6, 2012Applicants: SNECMA PROPULSION SOLIDE, SNECMAInventors: Fabrice Marcel Noel Garin, Romain Nicolas Lunel, Bruno Andre Jean Varin, Clement Roussille
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Publication number: 20120258641Abstract: A fiber reinforcing texture woven as a single part for fabricating a composite material part having an inner portion, or core, made by three-dimensional weaving with yarns made up from discontinuous fibers, and a portion adjacent to an outside surface, or skin, made by weaving with yarns made up from continuous filaments.Type: ApplicationFiled: June 12, 2012Publication date: October 11, 2012Applicant: SNECMA PROPULSION SOLIDEInventors: Eric Bouillon, François Charleux, Caroline Louchet-Pouillerie, Rémi Bouvier, Dominique Coupe
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Patent number: 8263504Abstract: A fiber reinforcing texture (10) woven as a single part for fabricating a composite material part having an inner portion (12), or core, made by three-dimensional weaving with yarns made up from discontinuous fibers, and a portion (14, 16) adjacent to an outside surface, or skin, made by weaving with yarns made up from continuous filaments.Type: GrantFiled: June 20, 2007Date of Patent: September 11, 2012Assignee: Snecma Propulsion SolideInventors: Eric Bouillon, François Charleux, Caroline Louchet-Pouillerie, Rémi Bouvier, Dominique Coupe