Patents by Inventor Sebastien Boufflert
Sebastien Boufflert 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: 11578729Abstract: A rotor for a turbomachine includes a disc and a plurality of blades fixed to the disc. Each blade of the plurality of blades is fixed to the disc via a lattice structure configured so that a tensile force applied to the lattice structure induces a change in the angle of incidence of the blade. The blades and the lattice structures are configured so that: (i) when the rotor is stationary, the distribution of the angles of incidence of the blades around the disc is aperiodic, and (ii) when the rotor is rotating at a predetermined rotational speed, the angles of incidence of the blades are identical.Type: GrantFiled: February 12, 2019Date of Patent: February 14, 2023Assignee: ARIANEGROUP SASInventors: Cyril Bernard Loiseau, Alexandre Michel Stéphane Brial, Sébastien Boufflert, François André Adrien Moser
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Publication number: 20200378400Abstract: A rotor for a turbomachine includes a disc and a plurality of blades fixed to the disc. Each blade of the plurality of blades is fixed to the disc via a lattice structure configured so that a tensile force applied to the lattice structure induces a change in the angle of incidence of the blade. The blades and the lattice structures are configured so that: (i) when the rotor is stationary, the distribution of the angles of incidence of the blades around the disc is aperiodic, and (ii) when the rotor is rotating at a predetermined rotational speed, the angles of incidence of the blades are identical.Type: ApplicationFiled: February 12, 2019Publication date: December 3, 2020Applicant: ARIANEGROUP SASInventors: Cyril Bernard LOISEAU, Alexandre Michel Stéphane BRIAL, Sébastien BOUFFLERT, François André Adrien MOSER
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Publication number: 20170030372Abstract: A fluid transfer device including a rotor having two centrifugal wheels, and a stator incorporating a set of continuous axi symmetric return channels conveying the fluid from the first wheel to the second wheel. Each of the return channels includes in succession a diffusing portion that guides the fluid in a centrifugal direction, a bend portion that redirects the fluid stream in a centripetal direction, a return portion that guides the fluid along a centripetal path, and then an outlet portion formed in a first non-tubular part that guides the fluid towards the second wheel. In these channels, the diffusing portion and the bend portion are distinct parts, and the diffusing portion is formed in a second non-tubular part secured to the first non-tubular part. A method of fabricating the device.Type: ApplicationFiled: April 8, 2015Publication date: February 2, 2017Applicant: AIRBUS SAFRAN LAUNCHERS SASInventors: Sebastien BOUFFLERT, Philippe BOURDIN, Fabien TESSIER, Vincent LANGLOIS
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Patent number: 9482271Abstract: In a disengageable axial thrust bearing for a rotary machine, an outer ring has first and second outer half-rings (114A, 114B) centered in a casing (116) and clamped in the axial direction between a stationary thrust member (118) and a first pre-loading system (120) exerting a first predetermined axial force such that, so long as the axial load exerted on the axial thrust bearing via a synchronization element (106) is greater than a determined threshold value, rolling elements (110) with oblique contacts present respective single lines (130) having two points of contact (130A, 130B) with an inner ring (102) and with the first outer half-ring (114A), the second outer half-ring (114B) being spaced apart from the first by a second predetermined axial force exerted by a second pre-loading system (126) inserted in the axial direction between the first and second outer half-rings, and such that the inner ring (102) is driven in rotation by the synchronization element, whereas, when the axial load exerted on the axiType: GrantFiled: March 25, 2014Date of Patent: November 1, 2016Assignee: SNECMAInventors: Sébastien Boufflert, Philippe Bourdin, Alban Lemaitre, Fabien Tessier
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Patent number: 9435373Abstract: In a rotary machine bearing including an inner ring, an outer ring, and rolling elements between them, one of the inner and outer rings includes first and second half-rings suitable for being clamped in the axial direction between a thrust member and a first pre-loading system exerting a first predetermined axial force, and a second pre-loading system is provided that is inserted in the axial direction between the first and second half-rings and that exerts a second predetermined axial force less than the first predetermined axial force.Type: GrantFiled: March 18, 2014Date of Patent: September 6, 2016Assignee: SNECMAInventors: Sebastien Boufflert, Philippe Bourdin, Alban Lemaitre, Fabien Tessier
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Publication number: 20160040711Abstract: In a rotary machine bearing including an inner ring, an outer ring, and rolling elements between them, one of the inner and outer rings includes first and second half-rings suitable for being clamped in the axial direction between a thrust member and a first pre-loading system exerting a first predetermined axial force, and a second pre-loading system is provided that is inserted in the axial direction between the first and second half-rings and that exerts a second predetermined axial force less than the first predetermined axial force.Type: ApplicationFiled: March 18, 2014Publication date: February 11, 2016Applicant: SNECMAInventors: Sebastien BOUFFLERT, Philippe BOURDIN, Alban LEMAITRE, Fabien TESSIER
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Publication number: 20160032964Abstract: In a disengageable axial thrust bearing for a rotary machine, an outer ring has first and second outer half-rings (114A, 114B) centered in a casing (116) and clamped in the axial direction between a stationary thrust member (118) and a first pre-loading system (120) exerting a first predetermined axial force such that, so long as the axial load exerted on the axial thrust bearing via a synchronization element (106) is greater than a determined threshold value, rolling elements (110) with oblique contacts present respective single lines (130) having two points of contact (130A, 130B) with an inner ring (102) and with the first outer half-ring (114A), the second outer half-ring (114B) being spaced apart from the first by a second predetermined axial force exerted by a second pre-loading system (126) inserted in the axial direction between the first and second outer half-rings, and such that the inner ring (102) is driven in rotation by the synchronization element, whereas, when the axial load exerted on the axiType: ApplicationFiled: March 25, 2014Publication date: February 4, 2016Applicant: SNECMAInventors: Sébastien BOUFFLERT, Philippe BOURDIN, Alban LEMAITRE, Fabien TESSIER
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Patent number: 9109606Abstract: The pump includes a stator and a rotor having an impeller in which a fluid duct passes. An axial balancing device arranged on this wheel includes a rear balancing chamber and a passage arranged between the wheel and the stator, enabling evacuation of fluid from the fluid duct to the balancing chamber. The pressure of fluid in the balancing chamber compensates the pressures exerted by the fluid on the rest of the rotor allowing axial balancing of the rotor. The passage includes an upstream nozzle and a downstream nozzle, as well as an intermediate annular chamber, arranged between walls of the wheel and of the stator, the intermediate chamber being arranged downstream of the upstream nozzle and upstream of the downstream nozzle.Type: GrantFiled: January 8, 2010Date of Patent: August 18, 2015Assignee: SNECMAInventors: Sébastien Boufflert, Nicolas Juhel, Patrice Fayolle, Stéphane Laffite
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Patent number: 9086077Abstract: The sealing of a turbine casing is reinforced by decoupling a fastening flange from a remainder of a housing. The casing includes a body that is externally reinforced by axial ribs that are connected to an annular rib and the fastening flange is attached to the annular rib by an annular wall portion that is thinner than the annular rib and than the flange.Type: GrantFiled: July 21, 2010Date of Patent: July 21, 2015Assignee: SNECMAInventors: Sebastien Boufflert, Philippe Bourdin, Vincent Langlois, Patrice Fayolle
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Publication number: 20120230816Abstract: The sealing of a turbine casing is reinforced by decoupling a fastening flange from a remainder of a housing. The casing includes a body that is externally reinforced by axial ribs that are connected to an annular rib and the fastening flange is attached to the annular rib by an annular wall portion that is thinner than the annular rib and than the flange.Type: ApplicationFiled: July 21, 2010Publication date: September 13, 2012Applicant: SNECMAInventors: Sebastien Boufflert, Philippe Bourdin, Vincent Langlois, Patrice Fayolle
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Publication number: 20120148384Abstract: The pump comprises a stator (112) and a rotor comprising a impeller in which a fluid duct (114) passes. An axial balancing device arranged on this wheel (111) comprises a rear balancing chamber (118) and a passage (120) arranged between the wheel (111) and the stator (112), enabling evacuation of fluid from the fluid duct (114) to the balancing chamber (118). The pressure of fluid in the balancing chamber (118) compensates the pressures exerted by the fluid on the rest of the rotor (111) allowing axial balancing of the rotor. The passage (120) comprises an upstream nozzle (140) and a downstream nozzle (160), as well as an intermediate annular chamber (150), arranged between walls (151, 152; 141, 142; 161, 162) of the wheel (111) and of the stator (112), the intermediate chamber being arranged downstream of the upstream nozzle (140) and upstream of the downstream nozzle (160).Type: ApplicationFiled: January 8, 2010Publication date: June 14, 2012Inventors: Sébastien Boufflert, Nicolas Juhel, Patrice Fayolle, Stéphane Laffite
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Patent number: 7789617Abstract: A suction stage for a pump with a centrifugal wheel, the suction stage including a rotational impeller equipped with a hub and arranged upstream of the centrifugal wheel, the suction stage further including a diffuser arranged between the impeller and the centrifugal wheel, the diffuser including a plurality of blades. The hub has a downstream surface extending axially so as to converge toward the centrifugal wheel, and the blades of the diffuser have free ends, the blades protruding radially toward the downstream surface.Type: GrantFiled: October 13, 2006Date of Patent: September 7, 2010Assignee: SNECMAInventors: Fabien Wahl, Jean-Michel Nguyen Duc, Fabien Tessier, Sebastien Boufflert
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Publication number: 20080080973Abstract: The invention relates to a suction stage (12) for a pump (10) with centrifugal wheel, the suction stage (12) comprising a rotational impeller (18) equipped with a hub (20) and arranged upstream of the centrifugal wheel (14), the suction stage (12) further comprising a diffuser (34) arranged between the impeller (18) and the centrifugal wheel (14), the diffuser (34) comprising a plurality of blades (36). The invention is characterised by the fact that the hub (20) has a downstream surface (20b) extending axially so as to converge toward the centrifugal wheel, and in that the blades (36) of the diffuser (34) have free ends, said blades protruding radially toward said downstream surface in such a way that the free ends of the blades make said downstream surface (20b) flush.Type: ApplicationFiled: October 13, 2006Publication date: April 3, 2008Applicant: SNECMAInventors: Fabien Wahl, Jean-Michel N. Guyen Duc, Fabien Tessier, Sebastien Boufflert