Patents Assigned to SNECMA
  • System for holding blades and assembly method
    Patent number: 9903375
    Abstract: A fan including a system for holding blades having variable pitch, in which the bases of the blades are mounted onto radial shafts of a rotor of the fan by pivots, is provided. The system includes a main body capable of being attached onto the rotor; and at least one holding arm mounted onto the main body and capable of extending inside a pivot so as to engage with the pivot in order to lock the movement of the pivot along the axis of the shaft on which the holding arm is mounted.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: February 27, 2018
    Assignee: SNECMA
    Inventors: Olivier Belmonte, Augustin Curlier
  • Device for securing and retaining at least one electrical harness in a turbomachine
    Patent number: 9903230
    Abstract: The device for securing and retaining at least one electrical harness in a turbomachine includes: at least one hollow profiled element that extends in one direction and has at least two slots of approximately the same dimension and; and a clamping element intended to retain the at least one harness in position in a manner parallel to the hollow profiled element. The clamping element includes: a touch-and-close tape designed to cooperate with the width of the slots so as to allow it to pass on both sides of the profiled element and; an end stop secured to the tape, the end stop preventing the tape from passing through one of the slots in the profiled element.
    Type: Grant
    Filed: January 21, 2014
    Date of Patent: February 27, 2018
    Assignee: SNECMA
    Inventors: Tewfik Boudebiza, Michel Henri Ziegler, Guillaume Marcillaud
  • Method for monitoring a thrust fault of an aircraft turbofan
    Patent number: 9897517
    Abstract: A method for monitoring a thrust fault of a turbofan during a modification of the thrust setting of the turbofan, the method including a step of processing the thrust setting via a filtering function and a transient-phase model such as to obtain a modelled thrust, a step of comparing the modelled thrust to the actual thrust such as to determine a thrust difference, a step of comparing the thrust difference to an alarm threshold; and a step of emitting an alarm in the event of exceeding the alarm threshold, wherein at a given iteration, in which the prior modelled thrust is known, the transient-phase model provides a time constant in accordance with the prior modelled thrust, and the filtering function provides a modelled thrust in accordance with the time constant obtained, the prior modelled thrust and the thrust setting.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: February 20, 2018
    Assignee: SNECMA
    Inventor: Cedrik Djelassi
  • Method for monitoring an ignition sequence of a turbomachine engine
    Patent number: 9896958
    Abstract: A method for monitoring an ignition sequence of an engine, in particular a turbomachine engine, including the following steps: (i) defining an ignition time of the engine for a defined starting parameter, (ii) comparing the ignition time of the engine defined in this way with a reference ignition time expected for a reference engine and for this starting parameter, (iii) deducing an indicator of the bringing into operation of the engine, (iv) repeating steps (i) to (iii) for this starting parameter, for each bringing into operation of the engine of the sequence, and (v) on the basis of the change in the indicator, generating a degradation alert for the ignition sequence of the engine.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: February 20, 2018
    Assignee: SNECMA
    Inventors: Guilhem Foiret, Francois Demaison, Benjamin Pierre Lamoureux
  • Propeller blade pivot
    Patent number: 9896189
    Abstract: The invention relates to the field of aerial propellers, in particular the field of variable-pitch propellers, specifically for unducted fans. More specifically, the invention relates to a pivot (15) for a blade (14) of a propeller (3a, 3b), the pivot including at least a proximal portion (15a) made of metal and suitable for being retained in a radial orifice of a propeller hub, while being capable of turning in said orifice about a longitudinal axis (Z) of the pivot (15), and a distal portion (15b) including a receptacle (20) suitable for retaining a blade root, and at least one arm (17) of organic matrix composite material extending laterally relative to said longitudinal axis (Z) and supporting a flyweight (16).
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: February 20, 2018
    Assignee: SNECMA
    Inventors: Sebastien Tajan, Adrien Jacques Philippe Fabre, Christophe Jacquemard, Adrien Laurenceau, Romain Boudier
  • Method for improved assembly of an actuator for an air bleed valve of a turbine engine
    Patent number: 9897012
    Abstract: A method for assembling an actuating ram of air bleed valves, which ram is placed between low pressure and high pressure compressors of a turbomachine, the ram including a piston rod surrounded by a spacer extending from the piston cylinder and configured to be connected to an end of the transmission mechanism linked to the bleed valves, the method including: deploying the piston rod such that it projects from the spacer; connecting the projecting piston rod to the end of the transmission mechanism; retracting the piston rod to bring the cylinder closer to the case wall; and attaching the spacer to the case wall.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: February 20, 2018
    Assignee: SNECMA
    Inventor: Sylvain Chauvel
  • Oil discharge device and turbomachine comprising such a device
    Patent number: 9897004
    Abstract: A device for discharging oil from an oil chamber located in a downstream part of a gas turbine engine, the device including: a mechanism discharging at least part of the oil contained in the chamber to exterior of the engine; and a drive mechanism for driving the oil, which allows passage of an air flow that assists in driving the discharge of the oil to the exterior of the engine. The drive mechanism includes: a ventilation port in the downstream part of the engine, such that the oil passes through the ventilation port; and a guide element arranged such that, after the oil has passed through the ventilation port, the oil is directed towards a downstream bleed area of the low-pressure turbine. A turbomachine can include such an oil discharge device.
    Type: Grant
    Filed: November 25, 2011
    Date of Patent: February 20, 2018
    Assignee: SNECMA
    Inventors: Amandine Roche, Jacques Rene Bart, Gerard Philippe Gauthier
  • Combustion chamber for a turbine engine
    Patent number: 9897316
    Abstract: A combustion chamber for a turbine engine such as an airplane turboprop or turbojet has inner and outer annular walls forming bodies of revolution that are connected together by an annular chamber end wall. The inner wall is constituted by a single thickness of material that presents thickness and/or nature varying along the longitudinal axis and/or the circumferential direction of said wall.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: February 20, 2018
    Assignee: SNECMA
    Inventors: Caroline Jacqueline Denise Berdou, Laurent Bernard Cameriano
  • Gas turbine engine comprising an exhaust cone attached to the exhaust casing
    Patent number: 9897011
    Abstract: An assembly including an exhaust casing and an exhaust cone for a gas turbine engine, each including an axial annular flange, the two flanges being inserted into one another, one being radially external and the other radially internal, and held together by a mechanical attachment, and the assembly further including a guide by which, during operation of assembling the annular flanges to each other, the exhaust cone is in a predetermined angular position relative to the exhaust casing.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: February 20, 2018
    Assignee: SNECMA
    Inventors: Mario Cesar De Sousa, Baghdad Achbari, Benoit Argemiro Matthieu Debray, Sylvain Pichon, Gregory Ghosarossian-Prillieux, Frederic Noel, Nicolas Pommier, Mathieu Ange Poisson
  • Seal assembly for a turbine engine comprising means for lubricating a brush seal
    Patent number: 9897212
    Abstract: An assembly forming a seal for a turbine engine, comprising a brush seal formed by a plurality of sealing bristles surrounding a core, a retaining cap comprising a portion at least partially housing the brush seal, and a support cover placed in contact with the brush seal in order to hold it in position against the retaining cap, the brush seal being situated between the retaining cap and the support cover. The support cover comprises a structure for lubricating the bristles of the brush seal, comprising an opening for collecting lubricating oil, a lubricating oil distribution groove connected to the opening, and at least one channel for flow of lubricating oil towards the bristles of the brush seal, connected to the groove.
    Type: Grant
    Filed: May 12, 2014
    Date of Patent: February 20, 2018
    Assignee: SNECMA
    Inventors: Romain Lagarde, Jean François Comin, René Serge Morreale
  • Turbine wheel for a turbine engine
    Patent number: 9890652
    Abstract: A rotating assembly for a turbine engine, comprising a disc having an outer periphery having alternating slots and teeth, blades radially extending from the disc and roots of which are axially engaged in the slots, with spaces called slot cavities being provided between the roots of the blades and the slots, platforms laterally extending from the blades and circumferentially arranged end-to-end, so as to form spaces called inter-blade cavities, and a downstream annular shroud, comprising an outer annular sealing lip opposite the downstream ends of the platforms. The downstream shroud further comprises an intermediate annular sealing lip opposite the downstream faces of the teeth of the disc, radially between the slot cavities and the inter-blade cavities.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: February 13, 2018
    Assignee: SNECMA
    Inventors: Maurice Guy Judet, Pierre Guillaume Auzillon, Matthieu Simon
  • Method of manufacturing a ceramic core for mobile blade, ceramic core and mobile blade
    Patent number: 9890643
    Abstract: A method of manufacturing a ceramic core for a blade including a lower part forming a core body, an upper part forming a squealer tip recess and a set of rods for holding the upper part and the lower part together, includes: coating the rods with a material that has a flash point below 1000° C.; positioning the rods in a mold; molding the upper and lower parts by injecting ceramic; firing the ceramic core.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: February 13, 2018
    Assignee: SNECMA
    Inventors: Franck Edmond Maurice Truelle, Alain Grandin, Maidin Mougamadou Aboudalcadar
  • Method and tool for the vapour phase deposition of a metal coating onto parts made of superalloys
    Patent number: 9890453
    Abstract: A method for vapor phase deposition of a metal coating onto parts made of superalloys, which includes arranging the parts in a chamber in a presence of grains of a donor of the coating metal and an activator capable of together forming a halide of the coating metal, and heating the chamber under an inert gas or reducing gas atmosphere to a temperature at which the coating metal halide reacts with the alloy of the parts. A bed of the grains is arranged on the bottom of at least one box, then a mounting for the parts is placed on the bed of grains, the mounting including support columns that keep the parts separate from the bed of grains, and the gas is injected into the box, when the box is closed, via a side located above the bed of grains.
    Type: Grant
    Filed: July 1, 2013
    Date of Patent: February 13, 2018
    Assignee: SNECMA
    Inventors: Gabriela Rodriguez Elizondo, Stephane Vitrac
  • Foundry core assembly for manufacturing a turbomachine blade, associated method of manufacturing a blade and associated blade
    Patent number: 9890644
    Abstract: A foundry core for manufacturing a blade of a turbomachine including a tip section offset, including a core element for forming various internal cavities, the core element including a leading-edge cavity internal core, central cavity internal cores, and a trailing-edge cavity internal core. The internal core for the central cavity adjacent to the internal core for the trailing-edge cavity includes a bulge extending toward the core for the leading-edge cavity.
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: February 13, 2018
    Assignee: SNECMA
    Inventors: Huu-Thanh Tran, Michael Hansom, Christian Bariaud, Patrice Eneau
  • Device for holding a fiber texture on an impregnation mandrel of a winding machine
    Patent number: 9889611
    Abstract: A device for holding a fiber texture on an impregnation mandrel of a winding machine, the device including a cross-member forming a support having each of its ends for fastening on one of cheekplates of the mandrel, a central pad carrier mounted on the cross-member and including a pad for pressing against a fiber texture layer wound on the mandrel, two lateral pad carriers mounted on the cross-member and each including a main pad for pressing against the fiber texture layer wound on the mandrel and a lateral pad for pressing against a lateral margin of the fiber texture layer wound on the mandrel, and a mechanism exerting a clamping force urging the pads against the fiber texture layer wound on the mandrel.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: February 13, 2018
    Assignee: SNECMA
    Inventors: Richard Mathon, Olivier Patrigeon, Micah Gummel
  • Tail cone for a microjet rotary turbine engine
    Patent number: 9885315
    Abstract: The invention relates to a rear casing for a turbine engine comprising a primary body generating a primary flow (10) to be ejected through a primary nozzle (6), said rear casing (7) being shaped so as to be positioned downstream from the primary body and to define, on the inside of the turbine engine, the path followed by the primary flow downstream from the primary nozzle (6). The tail cone is characterised in that it comprises a connection to a system for supplying a pressurised gas and at least one perforation (8) for injecting the pressurised gas through the perforation and into the primary flow. The casing preferably comprises at least one means for rotating same about the axis of rotation of the mobile elements of the primary body.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: February 6, 2018
    Assignees: SNECMA, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS), UNIVERSITE DE POITIERS, ENSMA
    Inventors: Alexandre Alfred Gaston Vuillemin, Maxime Koenig, Peter Jordan, Pierre Comte, Yves Gervais
  • System for changing the pitch of the blades of a propeller
    Patent number: 9884675
    Abstract: A system includes a linear-displacement fluidic actuator coaxial with the propeller, and a transmission device connecting the actuator to the blades that are to be controlled. The transmission device includes at least two radial arms arranged symmetrically with respect to the actuator and connected, on the inside, to a translationally mobile part of the actuator and, on the outside, to a translationally movable rotary transmission ring which is connected to the pivot pins of the blades by intermediate connecting mechanisms that convert the translational movement of the rotary ring brought about by the actuator into a rotation of the blades of the propeller.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: February 6, 2018
    Assignee: SNECMA
    Inventors: Augustin Curlier, Olivier Belmonte
  • Coupling of shafts using variable-profile splines
    Patent number: 9885389
    Abstract: A device for coupling two shafts by a gear mechanism includes a coupling part ending one of the two shafts. The coupling part is fitted concentrically into a complementary coupling part ending the other shaft. Splines of the coupling part have a constant profile along a median zone of the coupling part and which, in a first zone in continuation of the median zone, has a smaller thickness, between flanks of a spline, than a maximum thickness of the same spline in the median zone. Splines of the coupling part continue, beyond the first zone, as far as a centering zone on the same side as the first zone. The splines and the spline bottoms have, in the coupling zone between the centering zone and the first zone, a profile that continuously couples the splines and the spline bottoms to the surface of the centering zone.
    Type: Grant
    Filed: April 12, 2013
    Date of Patent: February 6, 2018
    Assignee: SNECMA
    Inventors: Stephane Bois, Guillaume Patin
  • Turbomachine comprising a plurality of fixed radial blades mounted upstream of the fan
    Patent number: 9885291
    Abstract: A bypass turbine engine including: an inner casing, an inter-duct casing, and an outer casing so as to define a primary duct between the inter-duct casing and the inner casing, and a secondary duct between the inter-duct casing and the outer casing; a rotary shaft including a movable fan including radial blades of which free ends face the outer casing of the turbine engine to compress an air flow in the secondary duct; a plurality of variable-pitch radial stator vanes mounted upstream of the movable fan so as to deflect the incident axial air prior to it being axially rectified by the movable fan in the secondary duct; and a system for individually regulating the pitch of the variable-pitch radial vanes if heterogeneity of the air flow in the secondary duct is detected, is provided.
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: February 6, 2018
    Assignee: SNECMA
    Inventors: Jean-Loic Herve Lecordix, Nils Bordoni
  • Power supply circuit
    Patent number: 9887058
    Abstract: A power supply circuit for electronic equipment that might be affected by overheating or by a fire, the power supply circuit including a bistable switch switchable between a first state in which the input terminal is connected to the output terminal, and a second state in which the input terminal is not connected to the output terminal, a first coil, and a second coil, the bistable switch being configured to switch to the first state when the magnetic field induced by the second coil is greater than the magnetic field induced by the first coil, and to switch to the second state when the magnetic field induced by the first coil is greater than the magnetic field induced by the second coil.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: February 6, 2018
    Assignee: SNECMA
    Inventors: Florent Nobelen, Olivier Herget