Patents Assigned to SNECMA
  • Casing for a propulsion unit
    Patent number: 9981751
    Abstract: An aircraft propulsion unit comprising an engine and a nacelle including an axisymmetric casing (16) delimiting an air flow path, wherein this casing has at least two openings closed by removable and interchangeable panels (18), at least one of these panels carrying one component (24) of the propulsion unit.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: May 29, 2018
    Assignee: SNECMA
    Inventors: Jeremy Edmond Fert, Julien Pavillet
  • Part to modify the profile of an aerodynamic jet
    Patent number: 9982546
    Abstract: A part to modify the profile of an aerodynamic jet, including: a first face configured to be secured on the aerodynamic jet, and a second face defining a modified aerodynamic jet profile, configured to modify an initial profile of the aerodynamic jet.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: May 29, 2018
    Assignee: SNECMA
    Inventors: Gregory Nicolas Gerald Gillant, Sylvain Dousseaud, Stephane Clemot
  • System for sealing an oil chamber from an adjoining exterior volume and turbo-machine provided with such a sealing system
    Patent number: 9982551
    Abstract: A system for sealing an oil chamber from an adjoining exterior volume, and a turbo-machine including a sealing system. The system for sealing the oil chamber from the adjoining exterior volume, both of which are delimited by a mobile rotor in rotation about an axis and a part, fixed or mobile, includes: a first seal arranged between the rotor and the part; a second seal that is mounted between the rotor and the part and which is offset longitudinally relative to the first seal, to form with the first seal a sealing chamber delimited by the rotor, the part, and the two seals; and a mechanism for supplying gas to the sealing chamber, such that the gas can be compressed when the rotor begins to rotate, the chamber communicating with the oil chamber and/or the adjoining exterior volume via the first and second seals alone, respectively.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: May 29, 2018
    Assignee: SNECMA
    Inventors: Dominik Igel, Delphine Leroux
  • Fluid intake system
    Patent number: 9976480
    Abstract: A fluid intake system including a fluid collector scoop designed to be fastened on an inside surface of a wall in order to collect the fluid flowing on the outside of the wall; and an extraction duct suitable for directing the fluid from an inlet orifice into the duct to at least one outlet orifice from the duct, is provided. The scoop is arranged so as to direct the collected fluid towards the inlet orifice of the extraction duct. In this system, at least one outlet orifice is of substantially elliptical section with a ratio of the major diameter of the ellipse over its minor diameter being greater than 1.5.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: May 22, 2018
    Assignee: SNECMA
    Inventors: Jackie Raymond Julien Prouteau, Pierrick Mouchoux
  • Method for differentiating control failures in a system for controlling an actuator, in particular of a stator of a gas-turbine engine
    Patent number: 9976439
    Abstract: The present invention relates to a method for differentiating control failures in a system for controlling an actuator (14) determining the position of a member for modifying the state of a gas-turbine engine, the system including a single- or dual-channel electric control and a mechanical control, the electric control including one computer (10, 10?) per channel, only one of which is active at any given time in order to calculate the set position of the movable member of the actuator (14) and to transmit a set signal to the single-channel mechanical control of the actuator, a failure being diagnosed when a deviation is detected between the set position of the movable member of the actuator and the position thereof measured during a predetermined deviation confirmation time.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: May 22, 2018
    Assignee: SNECMA
    Inventors: Severine Chevalier, Jose Roland Rodrigues, Alain Tiepel
  • System for detecting defects on an object
    Patent number: 9976967
    Abstract: A system and method for detecting defects on an object including forming an image representing the object from signals relating to the object, constructing subdivisions of the image according to auto-adaptive resolutions, and calculating differentials between various subdivisions in order to detect an abnormal subdivision indicating incipient failure.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: May 22, 2018
    Assignee: SNECMA
    Inventors: William Bense, Valerio Gerez
  • Device for the nondestructive test of a part
    Patent number: 9970901
    Abstract: An eddy current testing to detect defects at the surface or at shallow depth in a blade root for an airplane engine fan is provided. The device includes a probe containing a sensor, the probe being hinge-mounted to the end of a handle, a guide presenting a reference surface, and a mechanism for adjusting the position of the guide parallel to an axis of the handle.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: May 15, 2018
    Assignee: SNECMA
    Inventors: Christian Armand Marceau, Andre Rouff
  • Instrumented airfoil
    Patent number: 9970316
    Abstract: The invention relates to an instrumented airfoil for mounting in a flow passage through a turbine, compressor, or module of a turbine engine. An instrumentation member is attached to an airfoil and includes information-obtaining means received in a cutout formed in the airfoil and projecting relative to the leading edge or the trailing edge. According to the invention, the instrumentation member also comprises a holder portion that is united with the information-obtaining means and that is attached to the cutout in such a manner that its surface is in alignment respectively with the suction side wall, the pressure side wall, and the leading edge or the trailing edge of the airfoil, the transitions between these respective surfaces not presenting any setbacks.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: May 15, 2018
    Assignee: SNECMA
    Inventors: Gabrijel Radeljak, Pascal Couhier, Benedicte Leleu, Frederic Raymond Jean Miroudot, Sebastien Hameau, Antoine Jean Jausovec
  • Exhaust housing hub for a turbomachine
    Patent number: 9970320
    Abstract: An exhaust housing hub of a turbomachine, including a connecting wall and an inner channel wall, the connecting wall connecting the inner channel wall to inner attachment flanges, wherein a radial section of the connecting wall is curved and can be formed, as required, as a single component with the inner channel wall, the hub also including a series of ribs extending radially between the connecting wall and the inner channel wall.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: May 15, 2018
    Assignee: SNECMA
    Inventors: Mario Cesar De Sousa, Frederic Noel, Nicolas Pommier, Olivier Renon
  • Tool and method for frontal unscrewing of a link nut in a twin-spool turbine
    Patent number: 9970324
    Abstract: A method for unscrewing a link nut of an HP rotor of a twin-spool turbine, including a front fan, an intermediate casing, a HP module with a HP rotor, and a LP turbine module, the intermediate casing including a support bearing for the HP rotor, the rotor being retained in the bearing by the link nut, the method including: placing an unscrewing tool in front of the link nut after having removed the fan and released access to the nut from the front; with rotation of the HP rotor locked and the frontal unscrewing tool including a socket spanner including teeth having a shape that complements that of teeth of the link nut, attaching a mounting for the socket spanner to the intermediate casing, the socket spanner being rotatably mounted on the mounting, and applying an unscrewing torque to the socket spanner. An unscrewing tool implements the method.
    Type: Grant
    Filed: May 2, 2013
    Date of Patent: May 15, 2018
    Assignee: SNECMA
    Inventors: Fabrice Tailpied, Michel Bertin, Jean-Michel Couture, Herve Dagron, Roland Manchon, Cedric Mustiere
  • Method for producing a turbine engine part, and resulting mould and intermediate blank
    Patent number: 9969035
    Abstract: The invention relates to a method for producing multiple metal turbine engine parts, comprising steps consisting in: a) casting a metal alloy in a mold in order to produce a blank (3); and b) machining the blank in order to produce the parts, characterized in that the blank obtained by casting is a solid polyhedron having first and second sides (30a, 30b) and third and fourth sides (30c, 30d), in which the third and fourth sides extend between the first and second sides, flaring apart from the first side towards the second side, first at a first angle and subsequently at a second larger angle, and said at least one part is machined in the blank.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: May 15, 2018
    Assignee: SNECMA
    Inventors: Patrick Emilien Paul Emile Huchin, Karine Deschandol, Sébastien Digard Brou De Cuissart, Serge Fargeas, Marc Soisson, Anthony Texier, Valéry Piaton
  • Balancing screw, device and method for a rotating part of a turbine engine
    Patent number: 9970298
    Abstract: A balancing device for a rotating part of a turbomachine, includes a ferrule pierced with a plurality of ports, a balancing screw passing through each port, each balancing screw including a body and a head, the head of each balancing screw being pierced with a recess, the balancing screws being of at least one first type, the recess of the screws of the first type being formed by a driving recess from which an additional recess extends.
    Type: Grant
    Filed: January 6, 2014
    Date of Patent: May 15, 2018
    Assignee: SNECMA
    Inventors: Jean-Luc Le Strat, Hervé Pohier, Romain Jean-Louis Robert Thory
  • Case structure interposed between the engine and the nacelle with jointed ferrule segments
    Patent number: 9964041
    Abstract: A case structure interposed between the engine and the nacelle of the aircraft is provided. The case structure includes: a ferrule surrounding the engine and including a plurality of segments; at least one radial arm ensuring connection to the nacelle; and a plurality of attachment devices for securing the plurality of ferrule segments together or with at least one radial arm. The plurality of attachment devices includes an articulation device configured for ensuring coupling of the lifted-rotated-pushed type ensuring after disengagement of the ferrule segment, its pivoting about a pivot axis parallel to a longitudinal axis of the engine and then its blocking in a disengagement position.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: May 8, 2018
    Assignee: SNECMA
    Inventors: Ceddric Beljambe, Frederic Dautreppe, Noel Robin
  • Method for creating a metal reinforcement with insert for protecting a leading edge made of composite
    Patent number: 9963971
    Abstract: A method for producing a metal reinforcement for protecting a leading edge of a compressor blade of composite, including: creating a core that has a shape of an internal cavity of the reinforcement; creating an insert made of an alloy of a hardness greater than that of the reinforcement; shaping sheet metal by stamping with the creation, upstream of the core, a cavity between the metal sheets, which cavity is configured to accept the insert, positioning the sheets around the core with the insert placed in the cavity and securing the assembly together; creating a vacuum and closing the assembly by welding; consolidation by hot isostatic pressing; cutting the assembly to extract the core and separate the reinforcement; creating an external profile of the reinforcement by a final machining operation that reveals a material of the insert.
    Type: Grant
    Filed: April 11, 2013
    Date of Patent: May 8, 2018
    Assignee: SNECMA
    Inventors: Jean-Michel Patrick Maurice Franchet, Gilles Charles Casimir Klein, Gilbert Michel Marin Leconte, Dominique Magnaudeix
  • Turbomachine rotor blade
    Patent number: 9963980
    Abstract: A turbomachine rotor blade, said blade having, at the distal end thereof, a heel comprising: a platform (2) having a first edge (201) on the lower side and a second edge (202) on the upper side, at least one sealing member having a first end portion (301) on the lower side and a second end portion (302) on the upper side, said sealing member having a sealing top that extends radially outwards from said platform (2) between said first and second end portions (301, 302), characterized in that, for at least one sealing member, the heel (105) comprises, on at least at one of the edges (201, 202), a portion forming a bowl (5) extending along the end portion (301, 302) of the sealing member which corresponds to the edge (201, 202), the portion forming the bowl (5) being suitable for receiving a deposit of anti-wear material.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: May 8, 2018
    Assignee: SNECMA
    Inventors: Arnaud Negri, Romain Bard, Slim Bensalah, Alexandre Gimel, Thomas Lardellier, Denis Gabriel Trahot
  • Casting method for obtaining a part including a tapering portion
    Patent number: 9962763
    Abstract: A casting method for obtaining a part that includes a tapering portion, and a turbine engine blade obtained by casting and including a tapering trailing edge, are provided. The method includes: providing an insert element having a tapering section; making a shell around the insert element; and casting a molten material into the shell including the insert element.
    Type: Grant
    Filed: June 10, 2013
    Date of Patent: May 8, 2018
    Assignee: SNECMA
    Inventors: Sebastien Digard Brou De Cuissart, Josserand Bassery, Stephanie Deflandre
  • Propulsion unit for an aircraft
    Patent number: 9957056
    Abstract: The present disclosure relates to a propulsion unit for an aircraft including a nacelle which surrounds a turbojet engine. The nacelle has an inner structure surrounding a downstream compartment of the turbojet engine, and the inner structure includes two annular half-portions. The propulsion unit also includes a rail/guide unit and to move the annular half-portions between a working position and a maintenance position. In particular, the rail/guide unit radially moves away the annular half-portions relative to a longitudinal axis of the nacelle, during a translation movement of the annular half-portions. The nacelle is provided with a connecting rod which is connected to the annular half-portions and to the turbojet engine and so that the connecting rod contributes to rotate the annular half-portions about the rail.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: May 1, 2018
    Assignees: AIRCELLE, SNECMA
    Inventors: Patrick Boileau, Pierre Caruel, Carmen Ancuta, Bruno Beutin
  • Unlockable device for axially arresting a sealing ring with which an aircraft turbomachine module rotor wheel makes contact
    Patent number: 9957896
    Abstract: A device for axially arresting a sealing ring made of an abradable material in contact with a periphery of an aircraft turbomachine module rotor, the device having a first reference central axis, and including: a support including a support opening defining a circular track centered on a second axis at a distance from the axis; and an axial stop part including an extraction passage centered on a third axis at a distance from the axis, and defining a complementary circular track around its periphery, cooperating with the track to allow the part to rotate about the axis, between an axial stop position for the sealing ring, and a position to extract the ring through the extraction passage.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: May 1, 2018
    Assignee: SNECMA
    Inventors: Olivier Belmonte, Sebastien Jean Laurent Prestel
  • Turbine stage for a turbine engine
    Patent number: 9957841
    Abstract: A turbine stage for a turbine engine, the stage including a nozzle and a wheel mounted inside a sectorized ring carried by a casing. The nozzle is attached to the casing and is retained axially downstream by bearing against an annular split ring. Each ring sector includes at its upstream end a member of C-shaped section that is engaged on the casing rail and that holds the split ring radially. A radially inner wall of the C-shaped member of each ring sector extends inside the split ring over an entire axial dimension thereof and its upstream end portion is engaged in at least one recess of the nozzle.
    Type: Grant
    Filed: April 17, 2013
    Date of Patent: May 1, 2018
    Assignee: SNECMA
    Inventors: Alain Dominique Gendraud, Alberto Martin-Matos, Vincent Millier, Sebastien Jean Laurent Prestel
  • Fixed outside ring of a bearing with at least one drainage orifice passing through a guiding edge of at least one rolling element
    Patent number: 9957839
    Abstract: The invention relates to an outside ring of a rotary shaft bearing of a turbomachine, comprising a first guiding edge of at least one rolling element, the first guiding edge comprising an inside surface of the first guiding edge, an outside surface of the first guiding edge opposite the inside surface and at least one through-hole passing through the inside surface and the outside surface. Moreover, the inside surface of the first guiding edge forms a shoulder for guiding the rolling element, the through-hole defining a lubricant drainage orifice.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: May 1, 2018
    Assignee: SNECMA
    Inventors: Serge Louis Antunes, Arnaud Bessy