Patents Assigned to SNECMA
  • Apparatus and method for optimizing a test bed that is utilized for testing low cycle and high-cycle fatigue including modifying a support
    Patent number: 9829420
    Abstract: A method for optimizing a low cycle and optionally high-cycle fatigue test rig includes selecting variable geometric parameters of the support member and/or of the workpiece of the rig, in addition to ranges of variation of these parameters, selecting at least one aim or design objective to be achieved, a variation in the values of at least a part of the abovementioned parameters having an influence on this aim or design objective, and testing one or a plurality of the values of the abovementioned parameters, in the respective ranges of same, and determining those values that make it possible to achieve the aim or design objection. With those values, the method including producing or modifying a support member and/or a workpiece on the basis of the optimized parameters.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: November 28, 2017
    Assignee: SNECMA
    Inventors: Jean Vincent Manuel Meriaux, Guillaume Puech, Juan-Antonio Ruiz-Sabariego, Nathalie Serres
  • Method for producing a rotor vane for a turbomachine
    Patent number: 9827610
    Abstract: A method for producing a rotor vane (10) for a turbomachine, including producing a rough casting, the heel of which has a downstream lip (121) with a transverse increased thickness (130) such that the lip has an upstream surface (134) substantially parallel to an axis The method further includes machining said increased thickness so that the downstream lip has an upstream surface (138) inclined in relation to the axis.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: November 28, 2017
    Assignee: SNECMA
    Inventors: Guillaume Klein, Josserand Bassery, Sebastien Congratel, Raphael Dupeyre, David Mathieu, Ba-Phuc Tang
  • Turbojet engine cold stream flow path suspended from the exhaust case by radial crevice mounts and link rods
    Patent number: 9828877
    Abstract: A bypass turbojet engine including a cylindrical cold stream flow path supported by link rods which are attached to a cylindrical outer shell ring of an exhaust case at attachment points. The attachment points for the exhaust case are crevice mounts including lugs that extend radially from the outer shell ring, a bore of the crevice mounts being directed in a direction of generatrices of the outer shell ring.
    Type: Grant
    Filed: May 7, 2012
    Date of Patent: November 28, 2017
    Assignee: SNECMA
    Inventors: Thomas Gérard Daniel Riviere, François Robert Bellabal, Olivier Renon, Guilhem Seize
  • Method and system for attaching a piece of equipment to a structure made from composite material
    Patent number: 9827639
    Abstract: A method of placing a fastener plate on a structure made of composite material, the structure being obtained by a technique of injecting resin under a vacuum, the technique including placing a fiber preform in a closed mold, injecting a thermosetting resin into the mold, and polymerizing the resin prior to cooling. The method includes mounting a metal fastener plate against a wall of the mold before putting the fiber preform into place, the fastener plate coming into contact with one of faces of the fiber preform while the fiber preform is being put into place in the mold, and the resin becoming deposited between the fastener plate and the fiber preform while the resin is being injected into the mold. The method may be used in particular for fastening equipment on a composite material fan casing of a gas turbine for an aeroengine.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: November 28, 2017
    Assignee: SNECMA
    Inventors: Richard Mathon, Antoine Phelippeau
  • Flow regulating system for supplying propellant fluid to an electric thruster of a space vehicle
    Patent number: 9828975
    Abstract: A system for regulating the flow rate of a propellant fluid for an electrical thruster of a space vehicle, the vehicle including a tank of propellant fluid and a flow rate regulator connected to the outlet of said tank; the flow rate regulator including a heater element controlled by a computer and adapted to heat the propellant fluid and to modify its physical properties so as to vary the flow rate of propellant fluid leaving the tank; said system being characterized in that the computer also includes a plurality of empirical calibration curves that have been determined empirically for defining the flow rate of propellant fluid as a function of the magnitude of heating and as a function of environmental parameters, such that said computer also performs a function of determining the flow rate of the propellant fluid.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: November 28, 2017
    Assignee: SNECMA
    Inventors: Vanessa Vial, Anthony Lorand, Kevin Giboudeaux, Vaitua Leroi
  • Device for ventilating and supplying electrical power to an aircraft engine computer
    Patent number: 9821736
    Abstract: A device for ventilating and electrically powering a computer of an engine of an aircraft, the device including a feed mechanism feeding air to a proximity of the computer and a fan connected to a drive mechanism and configured to generate a stream of air for ventilating the computer. The fan is mounted in the air feed mechanism, and the drive mechanism includes an electrical machine configured to operate as a motor for driving the fan, and as a generator for powering the computer, a rotor of the machine when operating as a generator being driven by the fan, which is itself driven by a stream of air flowing in or leaving the air feed mechanism.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: November 21, 2017
    Assignee: SNECMA
    Inventors: Thomas Lepage, Bruno Robert Gaully
  • Assembly formed by a turbine nozzle or a compressor diffuser made of CMC for a turbine engine and by an abradable material support ring, and a turbine or a compressor incorporating such an assembly
    Patent number: 9822655
    Abstract: A turbine nozzle or a compressor diffuser includes sectors made of CMC material, each having an inner platform, an outer platform, and airfoils. An abradable material support ring is made up of sectors, each presenting upstream and downstream attachment tabs. Each inner platform presents on the inside an upstream hook and a downstream hook, and the abradable material support ring is supported by the nozzle or the diffuser by mutually engaging without fastening together firstly the end portions of the upstream attachment tabs and the upstream hooks and secondly the end portions of the downstream attachment tabs and the downstream hooks.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: November 21, 2017
    Assignees: SNECMA, HERAKLES
    Inventors: Antoine Jean-Philippe Beaujard, Elric Georges Andre Fremont
  • Bearing nut for measuring the rotational speed of a shaft connected to a turbomachine and associated measuring device
    Patent number: 9823145
    Abstract: A nut screwed around a rotating shaft with a view to securing a part to said shaft and to cooperate with a fixed sensor sensing a quantity of material in a pre-defined volume to measure the speed of rotation of the shaft, including a ring of teeth separated by slots. At least a portion of the teeth includes at least one recess maintaining the clamping function of the ring of teeth, the at least one recess forming, with notches separating the teeth, respective material deficit intervals detected by said sensor when passing through the detection volume during the rotation of the nut. A method of using the nut with a sensor in a rotational speed measuring device and the production of same.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: November 21, 2017
    Assignee: SNECMA
    Inventors: Stephane Rousselin, Jean-Francois Adnot, Benoit Mascrier
  • Method for analysing a fracture face of a part of a turbine engine
    Patent number: 9816905
    Abstract: Process for analyzing a fracture or crack surface of a TiAl turbomachine part, comprising at least one of the steps consisting in: a) marking on the surface the position and the orientation of cleavage facets, so as to identify a region of fracture or crack initiation and to determine the direction of propagation of this fracture or crack, b) examining the surface and detecting the regions with the presence of equiaxed grains and/or lamellar grains, so as to evaluate the temperature at which the fracture or crack has taken place, and c) comparing the heat tintings of the surface with those of samples from a heat tinting color chart so as to evaluate the speed of propagation of the fracture or crack.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: November 14, 2017
    Assignee: SNECMA
    Inventor: Fabrice Colladon
  • Device for detecting anomalies in an aircraft turbine engine by acoustic analysis
    Patent number: 9816970
    Abstract: A device for detecting anomalies in an aircraft turbine engine by acoustic analysis, the device not an onboard device and including: a mobile module including a directional system for acquiring acoustic signals from the turbine engine; a processor for processing the signals, which is suitable for generating a damage report; a transmitter for transmitting the damage report; a server capable of exchanging data with the mobile module, the server including a receiver for receiving the damage report; and a storage device suitable for storing the damage report.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: November 14, 2017
    Assignee: SNECMA
    Inventor: Jérôme Henri Noël Lacaille
  • Part made from 3D woven composite material
    Patent number: 9817923
    Abstract: A method designing a part made of 3D woven composite material, performed by a computer, the method including: obtaining shape data representing an outside surface of the part; for each point of a set of points of the outside surface, determining a distance between the point and a projection of the point onto a target surface, the projection being along a predetermined projection direction; determining a structure of a 3D woven preform as a function of the determined distances; and obtaining projection data specifying a projection direction as a function of a position of a point on the outside surface of the part, wherein the projection direction that is used for at least some of the points of the set of points is determined during the determining a distance, as a function of the projection and as a function of the position of the point.
    Type: Grant
    Filed: November 12, 2012
    Date of Patent: November 14, 2017
    Assignee: SNECMA
    Inventors: Yann Marchal, Jean-Noel Mahieu
  • Calibration head for the drilling of shafts
    Patent number: 9815130
    Abstract: A cylindrical calibration head for the drilling of a shaft, includes three flutes arranged evenly around the circumference so that they are spaced one from the next by an angle of 120° with respect to a rotation with respect to the axis of the calibration head, the flutes allowing for the removal of chips and the passage of lubricant during drilling, each of the flutes including a machining insert of which the position in the flute can be adjusted using an adjusting cartridge.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: November 14, 2017
    Assignee: SNECMA
    Inventors: Claude Gérard René Dejaune, Gérard Lehoux
  • Control device for the pitch of blades, and propeller
    Patent number: 9816385
    Abstract: A control device of the pitch of blades of a rotor of a propeller is provided. The control device includes: a radial shaft; a pivot connected to the blade, the rotation of the radial shaft driving the rotation of the pivot for the modification of the pitch of the blade; an insert fixed rigidly to the pivot so as to block their relative displacement, the radial shaft being configured to drive in rotation the insert; at least one peg passing through the insert and the pivot for transmission of the rotation of the insert to the pivot; and a heat insulation element arranged between the insert and the pivot, whereof the thermal conductivity is less than the thermal conductivity of the pivot and of the radial shaft.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: November 14, 2017
    Assignee: SNECMA
    Inventors: Adrien Jacques Philippe Fabre, Sebastien Emile Philippe Tajan, Christophe Paul Jacquemard, Sarah Chartier
  • Exhaust centerbody for a turbine engine
    Patent number: 9816461
    Abstract: An exhaust centerbody for a turbine engine is provided. The centerbody includes a truncated downstream part, which is connected to an upstream part by an annular ridge marking a discontinuity between the outer surfaces of the upstream and downstream parts. The outer surface of the downstream part has a substantially conical general shape, of which the tip is oriented downstream and is positioned in the region of the axis A, the axial half-section of this outer surface defining a line of which the upstream end part is substantially tangential to a straight line passing through the ridge and forming a non-zero angle ? with a tangent to the outer surface of the upstream part, in the region of the ridge, and of which the downstream end part is substantially tangential to a straight line passing through the tip and forming a non-zero angle ? with the axis A.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: November 14, 2017
    Assignee: SNECMA
    Inventors: Guillaume Pouyau, Nicolas Sirvin
  • Oligocyclic fatigue or oligocyclic and polycyclic fatigue test rig
    Patent number: 9810612
    Abstract: A low-cycle fatigue test rig reproduces bearing of turbine engine parts. The test rig includes a support member that is fixed to a frame and defines at least one bearing surface. A test piece is connected to a traction element for loading the test piece so that the test piece bears against the at least one bearing surface of the support member. The at least one bearing surface is supported by a support element that is mounted to rotate about a first axis on the support member. The test piece is connected to the traction element for articulation around a second axis that is perpendicular to the first axis. The test rig is configured to enable adjusting and locking the support element and the test piece in positions around the above-mentioned axes.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: November 7, 2017
    Assignees: SNECMA, TURBOMECA
    Inventors: Jean Vincent Manuel Meriaux, Guillaume Puech, Juan-Antonio Ruiz-Sabariego, Nathalie Serres, Laurent Houze
  • Sealing device for an oil enclosure in a turbine engine bearing
    Patent number: 9810095
    Abstract: A sealing device for a turbine engine bearing oil enclosure including a rotor shaft; an annular cover secured to an engine casing and arranged around the rotor shaft to co-operate therewith to define an oil enclosure that is to receive a bearing rotatably supporting the rotor shaft relative to the engine casing; a labyrinth seal mounted on the rotor shaft facing one end of the cover; an annular rim mounted inside the cover; a dynamic annular gasket interposed radially between the rim and the rotor shaft; and a clip for axially blocking the rim inside the cover and including at least one latch passing radially through the rim and being received radially inside a groove formed in the cover, is provided.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: November 7, 2017
    Assignee: SNECMA
    Inventors: Serge Rene Morreale, Dominik Igel
  • Method for manufacturing an oxide/oxide composite material turbomachine blade provided with internal channels
    Patent number: 9802869
    Abstract: An oxide/oxide composite material turbomachine blade including a fiber reinforcement obtained by weaving a first plurality of threads and a second plurality of threads, with the threads of said first plurality of threads being arranged in successive layers and extending in the longitudinal direction of the fiber blank corresponding to the longitudinal direction of the blade is disclosed. The reinforcement is densified by a matrix, with the blade further including one or several internal channels having a coiled shape extending in the longitudinal direction of the blade.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: October 31, 2017
    Assignee: SNECMA
    Inventors: Michael Podgorski, Bruno Jacques Gerard Dambrine, Ludovic Edmond Camille Molliex, Beryl Cassandre Anne Mereaux
  • Turbine engine stator wall covered in an abradable coating
    Patent number: 9803497
    Abstract: An annular turbine engine stator portion including a structural support provided in succession with a bonding underlayer and with an abradable coating formed by a resin filled with microbeads, the bonding underlayer for fastening the abradable coating to the structural support being formed by fiber reinforcement made of long fibers having a peripheral portion of the reinforcement that is secured to the structural support and having a central portion thereof that is impregnated with the resin filled with microbeads while the abradable coating is being fastened to the structural support.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: October 31, 2017
    Assignee: SNECMA
    Inventors: Philippe Charles Alain Le Biez, Nicolas Cornacchia, Lionel Marcin, Pierre Marie Montfort
  • Method of sticking together and un-sticking two parts by means of a filled adhesive
    Patent number: 9802380
    Abstract: A method of bonding a first part on a second part made of composite material by an adhesive, in which the adhesive is filled with elements of shape memory alloy, is provided. A method of un-sticking the first part adhesively bonded on the composite material second part is also provided. The un-sticking method includes a step of weakening the adhesive interface that consists in subjecting the adhesively bonded parts to heat treatment performed at a temperature that is lower or higher than the martensitic transformation temperature of the shape memory alloy elements.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: October 31, 2017
    Assignee: SNECMA
    Inventor: Emmanuel Chichery
  • EMC test bench comprising an item of equipment under test which is intended to be loaded on board an aircraft
    Patent number: 9804217
    Abstract: An EMC test bench, includes an item of equipment under test to be loaded on board an aircraft, the item of equipment being subjected to EMC tests and delivering ARINC electrical interfaces as inputs and as output; an electrical interfaces device representative of an item of anti-lightning equipment and including an ARINC signals acquisition and/or generation card connected to the ARINC inputs and outputs of the item of equipment under test; a command and control rack for analyzing control signals originating from the electrical interfaces device including the ARINC signals acquisition and/or generation card, and a signals conversion system for protecting the command and control rack connected between the command and control rack and the electrical interfaces device.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: October 31, 2017
    Assignee: SNECMA
    Inventors: Rémy Salvatge, Cyril Lair