Patents Assigned to SNECMA Moteurs
-
Publication number: 20060233644Abstract: In a turbomachine stator vane having a leading edge, a trailing edge, and pressure side and suction side faces, and including a perforated open liner defining an annular cavity between an outside wall of the liner and an inside wall of the vane, an air admission opening for feeding cooling air to the inside of the liner, and an air exhaust opening for exhausting a fraction of this cooling air out from the vane, the liner being secured to the vane at one end and being free at another end to slide along an inside edge of the vane under the effects of relative thermal expansion between the liner and the inside wall of the vane, provision is made for the open liner to comprise a plurality of holes distributed over only two determined zones of said liner, a first series of holes being disposed facing the inside wall of the leading edge and a second series of holes being disposed facing the inside wall of the trailing edge, the holes through the liner in the second series of holes also being disposed in such a mannType: ApplicationFiled: June 29, 2005Publication date: October 19, 2006Applicant: SNECMA MOTEURSInventors: Jean-Michel Guimbard, Philippe Pabion, Eric Schwartz
-
Patent number: 7121792Abstract: A nozzle vane for a rotary disk of a turbomachine, the vane comprising pressure side and suction side surfaces extending radially between a base and a tip and longitudinally between a leading edge and a trailing edge, with a plurality of vane sections having centers of gravity aligned along a stacking axis, the vane presenting a lower portion, an intermediate portion, and an upper portion, the lower portion extending radially between the base of the vane and a lower limit of the intermediate portion, and the upper portion extending radially between an upper limit of the intermediate portion and the tip of the vane, the stacking axis presenting, in the lower and upper portions, a tangential component that is substantially radial, and in the intermediate portion, a tangential component with two slopes.Type: GrantFiled: March 25, 2004Date of Patent: October 17, 2006Assignee: SNECMA MoteursInventors: Philippe Fessou, Mario Blozovski, Herve Quiniou
-
Publication number: 20060225426Abstract: A controlled hot flap shutter for a turbojet nozzle includes a friction surface made of metal, and including straight lateral flanks to reduce the gap between each controlled hot flap shutter and the tracking flap shutters adjacent thereto.Type: ApplicationFiled: September 16, 2004Publication date: October 12, 2006Applicant: SNECMA MOTEURSInventors: Guillaume Sevi, Stephane Blanchard, Thierry Pancou
-
Patent number: 7118139Abstract: The invention relates to couplings for fluid flowlines and more particularly to couplings that can be dismantled comprising flanges and a static ball-and-socket joint for use with flowlines having a diameter lying in the range 40 mm to 200 mm and transporting fluids (gases or liquids) of high penetrability, at high temperature of up to 800° C., and at high pressure of up to 450×105 Pa. Teh device comprises a flanged coupling device with a static ball-and socket joint comprising a first coupling member (1) having a conical sealing surface (8), a second coupling member (3) having concave sealing surface (10) of spherical shape, a two-barrier metal gasket (2) disposed between the sealing surface (8, 10) of the first and second coupling members (1, 3), and assembly means (4) for assembling the first and second coupling members (1, 3) together so as to hold the gasket (2) between their respective sealing surfaces (8, 10).Type: GrantFiled: June 29, 2001Date of Patent: October 10, 2006Assignees: Snecma Moteurs, NPO EnergomashInventors: Boris Ivanovitch Katorgin, Vladimir Konstantinovitch Tchvanov, Boris Mikhailovitch Gromyko, Eygueni Mikhailovitch Matveev, Igor Alexandrovitch Mikhaliov, Youri Vassilievitch Mitioukov, Ivan Denissovitch Postnikiov, Olga Nikolaevna Jelezniak
-
Patent number: 7117682Abstract: A controlled hot flap shutter for a turbojet nozzle includes a friction surface made of metal, and including straight lateral flanks to reduce the gap between each controlled hot flap shutter and the tracking flap shutters adjacent thereto.Type: GrantFiled: September 16, 2004Date of Patent: October 10, 2006Assignee: Snecma MoteursInventors: Guillaume Sevi, Stephane Blanchard, Thierry Pancou
-
Patent number: 7118322Abstract: A device for injecting cooling air into a turbo-machine turbine rotor includes a plurality of injectors distributed regularly around a longitudinal axis of the turbomachine and mounted between an inner shroud and an outer shroud. Each injector has a bimetallic structure with a first metal material forming a major portion of the structure of the injector and having a first coefficient of thermal expansion, and a second metal material forming a complementary portion of the structure in the vicinity of the suction side wall meeting the trailing edge of the injector, and having a second coefficient of thermal expansion that is smaller than the first.Type: GrantFiled: March 17, 2004Date of Patent: October 10, 2006Assignee: Snecma MoteursInventor: Didier Mortgat
-
Publication number: 20060222488Abstract: A nozzle vane for a rotary disk of a turbomachine, the vane comprising pressure side and suction side surfaces extending radially between a base and a tip and longitudinally between a leading edge and a trailing edge, with a plurality of vane sections having centers of gravity aligned along a stacking axis, the vane presenting a lower portion, an intermediate portion, and an upper portion, the lower portion extending radially between the base of the vane and a lower limit of the intermediate portion, and the upper portion extending radially between an upper limit of the intermediate portion and the tip of the vane, the stacking axis presenting, in the lower and upper portions, a tangential component that is substantially radial, and in the intermediate portion, a tangential component with two slopes.Type: ApplicationFiled: March 25, 2004Publication date: October 5, 2006Applicant: SNECMA MOTEURSInventors: Philippe Fessou, Mario Blozovski, Herve Quiniou
-
Patent number: 7114914Abstract: A device for controlling the clearance between the tips of rotary blades and a stationary ring assembly of a gas turbine, the device comprising a circular control box having at least two annular air circulation strips that are spaced apart from each other in the axial direction, each having a plurality of perforations in order to modify the temperature of the stationary ring assembly by discharging air, an annular air feed channel radially spaced from the air circulation strip, at least one air duct for feeding the feed channel with air, and a plurality of hollow distribution spacers connecting the air feed channel to the air circulation strips in order to feed the strips with air while enabling the air that has been discharged against the stationary ring assembly to flow between the feed channel and the circulation strips in order to be evacuated therefrom.Type: GrantFiled: July 22, 2004Date of Patent: October 3, 2006Assignee: Snecma MoteursInventors: Alain Gendraud, Delphine Roussin, David Audeon
-
Patent number: 7117115Abstract: A method for three-dimensional measurement of coordinates of a set of N predetermined points of the surface of a mechanical part to be measured, relatively to a predetermined reference system, and the direction cosines of the theoretical normals thereto at the theoretical points corresponding to the N predetermined points are known, and including a preparatory phase, in which the coordinate points, corresponding to the N predetermined points of a first mechanical part taken as a standard part, are measured; an initialization phase, in which displacement measurements (along the normals are read on the N points of the standard part; a measurement phase, in which N linear displacement measurements performed on the N points of the part to be measured corresponding to the N points of the standard part, are read; and a computation phase, in which the coordinates of the N points of the part to be measured are computed.Type: GrantFiled: May 9, 2005Date of Patent: October 3, 2006Assignee: Snecma MoteursInventors: Dominique Maurice Gerard Beignon, Pascal Desire Jacques Choquet, Joel Gandubert, Jean-Jacques Levy
-
Patent number: 7114912Abstract: An aircraft turbojet including a fan having a hub driven by a shaft carried by at least one bearing connected to the structure of the turbojet by a bearing support that includes an interposed decoupling device. The hub carries at its periphery a plurality of blades that move inside a retention casing with radial clearance E between the tips of the blades and an inside wall of the retention casing. The inside wall is lined in a layer of abradable material suitable for being planed away by the tips of the rotating blades. The tips of the blades are suitable for being disintegrated by the inside wall of the retention casing in the event of an impact following the appearance of unbalance that has led to the bearing being decoupled, to obtain a clearance J>E as required for operation of the decoupler.Type: GrantFiled: November 14, 2002Date of Patent: October 3, 2006Assignee: Snecma MoteursInventors: Valerio Gerez, Edouard Jadczak
-
Patent number: 7114337Abstract: A system for injecting an air/fuel mixture into a turbomachine combustion chamber, including a hollow tubular structure for the flow of the air/fuel mixture into the combustion chamber; a fuel injection device placed at an upstream end of the hollow tubular structure, and an air injection device placed downstream of the fuel injection device. The system also includes a cold plasma generator placed downstream of the air injection device so as to generate active species in the flow of the air/fuel mixture and to cause prefragmentation of the molecules of the air/fuel mixture. The system further includes a device for controlling the cold plasma generator depending on the speed of operation of the turbomachine.Type: GrantFiled: August 23, 2004Date of Patent: October 3, 2006Assignee: Snecma MoteursInventors: Michel Cazalens, Frederic Beule
-
Patent number: 7112040Abstract: A guide device for guiding a variable-pitch blade, in particular in a turbomachine compressor, the blade having a pivot formed by a cylindrical axial shank mounted in a cylindrical housing of a casing and pivotally guided about an axis in said housing by bearings, where the bearings are abutment bearings with conical rollers, the axes of the rollers being substantially perpendicular to the pivot axis of the blade.Type: GrantFiled: May 5, 2004Date of Patent: September 26, 2006Assignee: Snecma MoteursInventors: Pierre Debeneix, Alain Bromann, Francois Buffenoir
-
Patent number: 7112041Abstract: A device for guiding pivoting of variable-pitch vanes in a turbomachine, each vane having a pivot formed by a cylindrical axial shank which is guided in a cylindrical chimney of the casing and in a cylindrical orifice of a stationary element which surrounds the outside of the casing and which is centered and fixed relative thereto. The invention improves pivotal guidance of variable-pitch vanes.Type: GrantFiled: July 8, 2004Date of Patent: September 26, 2006Assignee: SNECMA MoteursInventors: Pierre Debeneix, Arnaud Langlois, Erick Boston, Alain Leman, Vincent Garnier, Jacques Audet
-
Patent number: 7108224Abstract: A suspension of the turbo fan engine to an aircraft pylon, includes a fitting arranged to be attached to a pylon, a lever fastened in its central portion to the fitting via a linking device with a pivot pin. Two thrust rods are each connected by an end to the lever and including at the other end of the fastening device to the engine. The linking device is composed on the central portion of the lever, of two parallel branches apart from one another, and on the fitting, of a central fastening tab, whereas the fastening tab and both branches are held together by dint of the pivot pin.Type: GrantFiled: May 6, 2004Date of Patent: September 19, 2006Assignee: SNECMA MoteursInventors: Felix Pasquer, Philippe Loewenstein, Marc Tesniere
-
Patent number: 7108486Abstract: A rotary turbojet blade comprises a plurality of blade sections extending along a line of the centers of gravity of said sections between a base and a tip, said blade presenting along a radial axis a bottom portion, an intermediate portion, and a top portion, said bottom portion presenting a longitudinal angle of inclination for a leading edge line, said intermediate portion presenting a backward longitudinal angle of inclination for said leading edge line, and said top portion presenting a backward longitudinal angle of inclination for said leading edge line and a tangential angle of inclination for said line of the centers of gravity in a direction opposite to the direction of rotation of said blade.Type: GrantFiled: February 12, 2004Date of Patent: September 19, 2006Assignee: Snecma MoteursInventors: Jerome Talbotec, Philippe Fessou, Herbert Joly, Beatrice Bois
-
Patent number: 7108484Abstract: A restraining device for a fan blade root, in which a packing member is constituted by a metal structure having hollowed out portions filed in by overmolding with a semi-rigid elastomer material, in particular on a lateral edge concave side between an upstream end zone and a downstream end zone, which end zones are entirely of metal structure, on a lateral edge convex side between the end zones and a central zone that is essentially of metal structure, and on two top portions of the packing member that extend between the elastomer lateral edges on either side of the metal central zone. The metal structure also includes a bottom recess extending over its entire surface between the upstream end zone and the downstream end zone. Hence, the metal structure behaves like a spring blade when the blade turns following a violent impact.Type: GrantFiled: June 25, 2003Date of Patent: September 19, 2006Assignee: Snecma MoteursInventors: Anne Thenaisie, Alain Bassot, Eric Inghels, Hervé Buisson, Christophe Follonnier, Patrick Reghezza, Bruce Pontoizeau
-
Patent number: 7107695Abstract: A hand-operated feeler includes a rod on a crossed movement table mounted on a support fitted with an immobilization device at a fixed reference as compared to the part to be measured and a processing unit configured to store and process the results. Such a device results in rapidly measuring the contours of parts including deep and sunken honeycomb cells.Type: GrantFiled: March 25, 2004Date of Patent: September 19, 2006Assignee: Snecma MoteursInventors: Bernard Paillarse, Pierre Jamault, Dominique Thibault
-
Patent number: 7107169Abstract: The invention relates to a device for determining a measurement of mass flow of fluid for a combustion chamber comprising a fluid metering device and a means of measuring the position of the metering device being measured.Type: GrantFiled: August 5, 2004Date of Patent: September 12, 2006Assignee: Snecma MoteursInventor: Florian Vary
-
Patent number: 7101173Abstract: The invention provides a combustion chamber comprising a chamber wall disposed radially inside a casing, an igniter plug for igniting the air-fuel mixture, the plug being mounted on said casing and comprising a body with a free end that is disposed in an opening formed through said chamber wall with a large amount of clearance to accommodate relative displacement between said casing and said chamber wall, and a sealing device provided between said body and the perimeter of said opening, said sealing device comprising an annular plug-guide through which said body passes, the plug-guide being slidably mounted at the radially-outer end of an annular support whose base is secured to said perimeter, wherein the support is secured to the radially-outer portion of a chimney passing through said opening and presenting at its radially-inner end a collar bearing against the inside face of the chamber wall, and wherein a cooling circuit for said collar is provided.Type: GrantFiled: June 18, 2004Date of Patent: September 5, 2006Assignee: Snecma MoteursInventors: Didier Hernandez, Mario De Sousa, Patrice Commaret
-
Patent number: 7100869Abstract: The carrier structure of the invention is used for carrying a turboprop and it is designed to be mounted beneath and/or in front of an airplane wing. In characteristic manner, the carrier structure comprises: a top portion comprising a front arch, a rear arch, and longitudinal beams; an upwardly-open removable bottom portion comprising at least two bottom arches and longerons; the bottom portion being demountably fixed to the top portion by centering and fixing devices, the bottom and top portions together defining a housing suitable for receiving said turboprop, and a suspension for carrying said turboprop.Type: GrantFiled: February 19, 2004Date of Patent: September 5, 2006Assignee: SNECMA MoteursInventors: Jean-Louis Picard, Georges Mazeaud