Patents by Inventor Alain Gendraud
Alain Gendraud has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8905710Abstract: A turbomachine rotor wheel including blades made of composite material; an annular mounting plate; a plurality of composite material blades mounted on the mounting plate, each blade also including a top platform at its tip carrying radial labyrinth teeth; an orientation disk fastened coaxially around the mounting plate and including at its outer periphery a plurality of axial slots that are open at one end, each slot presenting a cross-section that matches the cross-section of a blade root so as to hold it angularly in position by co-operation of shapes; and a variable-diameter spring ring housed in part in an axial notch formed in each blade root and projecting axially relative thereto, the spring ring to come into radial abutment against an inside surface of the orientation disk during radial outward movement of the blades relative to the mounting plate.Type: GrantFiled: December 22, 2009Date of Patent: December 9, 2014Assignee: SNECMAInventors: Stephane Blanchard, Alain Gendraud
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Publication number: 20110268561Abstract: A turbomachine rotor wheel including blades made of composite material; an annular mounting plate; a plurality of composite material blades mounted on the mounting plate, each blade also including a top platform at its tip carrying radial labyrinth teeth; an orientation disk fastened coaxially around the mounting plate and including at its outer periphery a plurality of axial slots that are open at one end, each slot presenting a cross-section that matches the cross-section of a blade root so as to hold it angularly in position by co-operation of shapes; and a variable-diameter spring ring housed in part in an axial notch formed in each blade root and projecting axially relative thereto, the spring ring to come into radial abutment against an inside surface of the orientation disk during radial outward movement of the blades relative to the mounting plate.Type: ApplicationFiled: December 22, 2009Publication date: November 3, 2011Applicant: SNECMAInventors: Stephane Blanchard, Alain Gendraud
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Patent number: 7360987Abstract: A method of assembling sectored elements of an annular stator of a high-pressure turbine of a turbomachine about a longitudinal axis of said turbine, in which method an angular distribution pattern is defined for distributing elements of the stator over a predetermined angular sector, said pattern being defined so as to prevent inter-sector zones of stator elements being in radial alignment, said zones being defined between two adjacent sectors of the same stator element, and so as to repeat said distribution pattern around the entire circumference of the stator.Type: GrantFiled: March 7, 2005Date of Patent: April 22, 2008Assignee: SnecmaInventors: Anne-Marie Arraitz, Thierry Fachat, Jerome Friedel, Alain Gendraud, Delphine Roussin
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Patent number: 7309209Abstract: A device for tuning clearance at rotor blade tips in a gas turbine rotor, the device comprising at least one annular air flow duct that is mounted around the circumference of an annular casing of a stator of the turbine, the annular air flow duct being designed to discharge air onto the casing in order to modify the temperature thereof. A tubular air manifold is disposed around the air flow duct(s). There are also disposed an air feed tube to supply the tubular air manifold with air and an air pipe opening in the tubular air manifold and opening out into the air flow duct(s). The air pipe is provided with a balancing diaphragm for balancing the air flowing through the pipe.Type: GrantFiled: March 7, 2005Date of Patent: December 18, 2007Assignee: Snecma MoteursInventors: Denis Amiot, Anne-Marie Arraitz, Thierry Fachat, Alain Gendraud, Delphine Roussin
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Publication number: 20070264120Abstract: A device for tuning clearance at rotor blade tips in a gas turbine rotor, the device comprising at least one annular air flow duct that is mounted around the circumference of an annular casing of a stator of the turbine, the annular air flow duct being designed to discharge air onto the casing in order to modify the temperature thereof. A tubular air manifold is disposed around the air flow duct(s). There are also disposed an air feed tube to supply the tubular air manifold with air and an air pipe opening in the tubular air manifold and opening out into the air flow duct(s). The air pipe is provided with a balancing diaphragm for balancing the air flowing through the pipe.Type: ApplicationFiled: March 7, 2005Publication date: November 15, 2007Applicant: SNECMA MOTEURSInventors: Denis Amiot, Anne-Marie Arraitz, Thierry Fachat, Alain Gendraud, Delphine Roussin
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Patent number: 7287955Abstract: A clearance control device for controlling clearance between rotary blade tips and a stationary bushing of a gas turbine having a casing that is provided with at least two annular ridges, the clearance control device including a circular tuning unit that includes air circulation means for circulating air, said means being made up of at least three ducts; air supply means for supplying air to the air flow ducts; and air discharge means for discharging air on the ridges in order to modify the temperature, the air discharge means for each duct being made up of at least one top row having a number N of perforations disposed facing one of the side faces of the ridges and of at least one bottom row having a number 2N of perforations disposed facing a connection radius that connects the ridges to the casing.Type: GrantFiled: January 10, 2005Date of Patent: October 30, 2007Assignee: Snecma MoteursInventors: Denis Amiot, Anne-Marie Arraitz, Thierry Fachat, Alain Gendraud, Pascal Lefebvre, Delphine Roussin-Moynier
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Patent number: 7201559Abstract: A stationary ring assembly forming a rotor shroud for a gas turbine including a plurality of segments having adjacent side faces that are placed end to end with sealing means interposed therebetween. The sealing means include at least one axial sealing strip and at least one radial sealing strip respectively received in axial slots and in radial slots formed facing one another in the adjacent side faces of the segments. At least one end of each radial slot opens out into the corresponding axial slot, each axial slot of a segment presents a depth that is greater than the depth of the corresponding radial slot, and the axial sealing strip presents a width that is greater than the width of the radial strip.Type: GrantFiled: April 21, 2005Date of Patent: April 10, 2007Assignee: SnecmaInventors: Alain Gendraud, Delphine Roussin-Moynier
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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
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Publication number: 20050248100Abstract: A stationary ring assembly forming a rotor shroud for a gas turbine, the stationary ring assembly comprising a plurality of segments having adjacent side faces that are placed end to end with sealing means interposed therebetween, the sealing means comprising at least one axial sealing strip and at least one radial sealing strip respectively received in axial slots and in radial slots formed facing one another in the adjacent side faces of the segments, at least one end of each radial slot opening out into the corresponding axial slot, each axial slot of a segment presenting a depth that is greater than the depth of the corresponding radial slot, and the axial sealing strip presenting a width that is greater than the width of the radial strip.Type: ApplicationFiled: April 21, 2005Publication date: November 10, 2005Applicant: Snecma MoteursInventors: Alain Gendraud, Delphine Roussin-Moynier
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Publication number: 20050238477Abstract: A method of assembling sectored elements of an annular stator of a high-pressure turbine of a turbomachine about a longitudinal axis of said turbine, in which method an angular distribution pattern is defined for distributing elements of the stator over a predetermined angular sector, said pattern being defined so as to prevent inter-sector zones of stator elements being in radial alignment, said zones being defined between two adjacent sectors of the same stator element, and so as to repeat said distribution pattern around the entire circumference of the stator.Type: ApplicationFiled: March 7, 2005Publication date: October 27, 2005Applicant: SNECMA MOTEURSInventors: Anne-Marie Arraitz, Thierry Fachat, Jerome Friedel, Alain Gendraud, Delphine Roussin
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Publication number: 20050158169Abstract: A clearance control device for controlling clearance between rotary blade tips and a stationary bushing of a gas turbine having a casing that is provided with at least two annular ridges, the clearance control device including a circular tuning unit that includes air circulation means for circulating air, said means being made up of at least three ducts; air supply means for supplying air to the air flow ducts; and air discharge means for discharging air on the ridges in order to modify the temperature, the air discharge means for each duct being made up of at least one top row having a number N of perforations disposed facing one of the side faces of the ridges and of at least one bottom row having a number 2N of perforations disposed facing a connection radius that connects the ridges to the casing.Type: ApplicationFiled: January 10, 2005Publication date: July 21, 2005Applicant: SNECMA MOTEURSInventors: Denis Amiot, Anne-Marie Arraitz, Thierry Fachat, Alain Gendraud, Pascal Lefebvre, Delphine Roussin-Moynier
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Publication number: 20050042080Abstract: 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: ApplicationFiled: July 22, 2004Publication date: February 24, 2005Applicant: SNECMA MOTEURSInventors: Alain Gendraud, Delphine Roussin, David Audeon