公开(公告)号：US10082106B2

公开(公告)日：2018-09-25

申请号：US14760190

申请日：2014-01-10

Applicant: SNECMA

Inventor： Didier Vuillamy ,  Gérard Roz

IPC: F02K1/00 ,  F02K9/60 ,  F02K9/46 ,  F02K9/64 ,  F02K9/40 ,  F02K9/97

CPC classification number: F02K9/60 ,  F02K9/40 ,  F02K9/46 ,  F02K9/605 ,  F02K9/64 ,  F02K9/972 ,  F05D2260/20 ,  F05D2260/205

Abstract: The invention relates to the aerospace field, and in particular to the field of vehicles propelled by rocket engines. In particular, the invention relates to a feed circuit (6) for feeding a rocket engine (2) at least with a first liquid propellant, the feed circuit including at least one first heat exchanger (18) suitable for being connected to a cooling circuit (17) for cooling at least one heat source in order to cool said heat source by transferring heat to the first propellant, and, in addition, downstream from said first heat exchanger, a branch passing through a second heat exchanger.

公开(公告)号：US20180230858A1

公开(公告)日：2018-08-16

申请号：US15951592

申请日：2018-04-12

Applicant: SNECMA

Inventor： Fabrice Tailpied ,  Michel Bertin ,  Jean-Michel Couture ,  Herve Dagron ,  Roland Manchon ,  Cedric Mustiere

IPC: F01D25/28 ,  B25B21/00 ,  F01D5/06 ,  B25B13/48

CPC classification number: F01D25/285 ,  B23P19/042 ,  B25B13/48 ,  B25B21/002 ,  F01D5/066 ,  F05D2230/70 ,  Y10T29/4932

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.

公开(公告)号：US10041828B2

公开(公告)日：2018-08-07

申请号：US14893908

申请日：2014-05-22

Applicant: SNECMA

Inventor： Nicolas Broussais-Colella ,  Jean-Yves Chatellier ,  Jeremy Duval

IPC: G01N29/44 ,  G01N29/04 ,  G01H1/00 ,  G01N29/11

Abstract: A method for inspecting an object by ultrasound transmission, including sweeping an ultrasound beam over a reference part that has the same geometry as the object to be inspected, and measuring the amplitude transmitted through the part to obtain a mapping thereof. The ultrasound beam is amplified with a reference gain. The method further includes determining gain corrections to be added to the reference gain at certain points during the sweeping of the reference part to obtain an ultrasound beam amplitude transmitted through the part which is constant at each point of the mapping, and sweeping an ultrasound beam over the object to be inspected and measuring the transmitted amplitude. The gain applied to the various points during the sweeping corresponds to the reference gain corrected on the basis of said corrections.

公开(公告)号：US10041196B2

公开(公告)日：2018-08-07

申请号：US15026287

申请日：2014-09-29

Applicant: SNECMA ,  SAFRAN

Inventor： Matthieu Gimat ,  Yann Marchal ,  Dominique Coupe

IPC: D03D25/00 ,  B29C70/22 ,  B29C70/24 ,  F01D5/28 ,  B29K105/08 ,  B29L31/08

Abstract: A fiber structure includes a blank portion formed as a single part by three-dimensional weaving between a first plurality of yarn layers and a second plurality of yarn layers, the blank portion corresponding to all or part of a fiber reinforcement preform for a part made of composite material. Outside the blank portion, the fiber structure includes one or more two-dimensional fabric layers, each two-dimensional fabric layer grouping together the yarns of a single layer belonging to at least the first plurality of yarn layers and situated outside the blank portion.

公开(公告)号：US10036318B2

公开(公告)日：2018-07-31

申请号：US14978799

申请日：2015-12-22

Applicant: SNECMA

Inventor： Christian Vessot ,  Matthieu Leyko

IPC: F02C6/08 ,  F02C7/12 ,  F02C7/18

CPC classification number: F02C6/08 ,  F02C7/125 ,  F02C7/18 ,  F05D2250/41 ,  F05D2250/51 ,  F05D2250/90 ,  F05D2260/56 ,  Y02T50/675

Abstract: A device for circulation of air for a turbomachine, the device including an inlet provided to receive incident airflow, air circulation ducts connected to the inlet, a central part including side walls, peripheral walls arranged at a distance from the central part, so as to form the air circulation ducts, each duct being arranged between one of the side walls of the central part and one of the peripheral walls, each peripheral wall including an upstream end portion delimiting with one of the side walls an inlet orifice of one of the ducts and a downstream end portion delimiting with one of the side walls an outlet orifice of one of the ducts, at least one member mobile in translation relative to the peripheral walls, the at least one mobile member being formed in the central part and arranged so that its displacement varies a section of each of the inlet orifices and a section of at least one of the outlet orifices.

公开(公告)号：US10035226B2

公开(公告)日：2018-07-31

申请号：US14414772

申请日：2013-07-02

Applicant: SNECMA

Inventor： Yann Marchal ,  Philippe Marolle ,  Claire Rousseau

IPC: B23P15/02 ,  B29B11/16 ,  F01D5/28

CPC classification number: B23P15/02 ,  B29B11/16 ,  F01D5/282 ,  Y10T29/49332 ,  Y10T29/49995 ,  Y10T83/141

Abstract: A method for cutting a preform usable for production of a turbomachine part and including a weaving of a plurality of threads, the threads including single threads that are visually identifiable, along a cutting contour calculated based on a preform model in which the threads have a reference arrangement, the method including: taking an image of the preform; processing the image to determine a deviation in an arrangement of the threads which are visually identifiable relative to the reference layout; correcting the cutting contour according to the deviation; and cutting the preform along the corrected cutting contour.

公开(公告)号：US10024240B2

公开(公告)日：2018-07-17

申请号：US14751953

申请日：2015-06-26

Applicant: SNECMA

Inventor： Guilhem Alcide Auguste Foiret

IPC: F02C7/268 ,  F02C7/27 ,  F01D19/00 ,  F02C9/16 ,  F02C9/18 ,  F02C7/057

Abstract: A method of determining a duration of a movement of a starter air valve of a turbine engine, the valve for regulating the passage of a flow of pressurized air from upstream to the downstream of pipework, where the downstream side is connected to a pneumatic starter of the turbine engine, the method including determining an instant of initiation and an instant of completion of a movement of the valve during a movement phase of the valve, determining the duration of the movement of the valve, by subtracting the instant of initiation from the instant of completion, calculating a difference between the determined duration of the movement and a theoretical value of the duration.

公开(公告)号：US10024176B2

公开(公告)日：2018-07-17

申请号：US14918241

申请日：2015-10-20

Applicant: SNECMA

Inventor： Norman Bruno André Jodet ,  Hervé Rolland

IPC: F01D5/28 ,  F01D5/16 ,  F01D5/00 ,  F01D5/14

Abstract: A turbine engine rotor blade having a trailing edge (20A) with a modified surface state (22, 28) enabling the flow speed passing around the blade to be altered so as to modify the acoustic interaction against structural elements (12) that interact with the flow downstream from the rotor blade.

公开(公告)号：US20180195978A1

公开(公告)日：2018-07-12

申请号：US15106154

申请日：2014-12-09

Applicant: SNECMA ,  CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE ,  ECOLE NORMALE SUPERIEURE DE CACHAN

Inventor： Julien SCHNEIDER ,  Francois HILD ,  Hugo LECLERC ,  Stephane ROUX

IPC: G01N23/046 ,  G06T7/00

CPC classification number: G01N23/046 ,  G01N2223/1016 ,  G01N2223/419 ,  G01N2223/425 ,  G01N2223/426 ,  G01N2223/615 ,  G01N2223/63 ,  G01N2223/645 ,  G06K9/00624 ,  G06T7/001 ,  G06T2207/10081 ,  G06T2207/30164

Abstract: A method of characterizing a part including obtaining an X-ray tomography image of the part and then a step of correlating the image with a reference wherein the correlation step includes searching among a predefined set of X-ray tomography image transformations for a transformation that minimizes the difference between the image and the reference in order to characterize the inside of the part.

公开(公告)号：US10012097B2

公开(公告)日：2018-07-03

申请号：US14767183

申请日：2014-02-19

Applicant: Snecma

Inventor： Sébastien Jean Laurent Prestel ,  Denis Aydin ,  Rémi Blanc ,  Hélène Condat ,  Patrice Jean-Marc Rosset

IPC: F01D9/04 ,  F01D25/24 ,  F01D11/00

CPC classification number: F01D9/04 ,  F01D9/042 ,  F01D11/005 ,  F01D25/243 ,  F01D25/246 ,  F05D2220/323 ,  F05D2230/18 ,  F05D2230/238 ,  F05D2230/60 ,  F05D2230/644 ,  F05D2240/125

Abstract: A nozzle sector of an aircraft turbo-machine, including a hooking member (64) having a projection (70, 70a, 70b) radially extending towards the outside of the sector, a recess (72) being provided through at least one part of a distal end of the projection (70, 70a, 70b), the recess (72) being configured to accommodate a shoulder member (74) forming a stop for a surface of an adjacent sector (26).