Formed With Main Spar Patents (Class 416/226)
  • Patent number: 9816482
    Abstract: A spar cap for a rotor blade of a wind turbine is disclosed. The rotor blade includes a blade root and a blade tip, leading and trailing edges, pressure and suction sides, and at least one spar cap configured on an internal surface of either or both the pressure or suction sides. The spar cap includes one or more layers of a first material and a second conductive material contacting at least one of the layers of the first material. Further, the conductive material is different than the first material. Thus, the conductive material is configured with the first material so as to create an equipotential spar cap.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: November 14, 2017
    Assignee: General Electric Company
    Inventors: Christopher Daniel Caruso, Aaron A. Yarbrough, Richard Allen Hardison
  • Patent number: 9739259
    Abstract: A hybrid turbine blade having a box beam assembly structure and method of designing such a hybrid turbine blade are disclosed. The box beam assembly provides the primary structure for supporting loads on the blade, and comprises oppositely positioned spar caps joined by oppositely positioned shear webs. For a portion of the blade, the box beam assembly further comprises a root buildup. In one embodiment, the shear webs comprise foam core sandwiched between two biaxial fiber-reinforced plastic laminates (FRP), the spar caps comprise uniaxial FRP laminates, and the root buildup comprises triaxial FRP laminates. The blades are designed using a novel inside-out method, wherein the box beam is first designed to support expected loads, and an aerodynamic surface is then designed to be supported by the box beam. The blade may be constructed in segments that are joined with connectors that engage the box beam structure.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: August 22, 2017
    Assignee: The Regents of the University of California
    Inventors: Perry M. Roth-Johnson, Richard E. Wirz
  • Patent number: 9709030
    Abstract: Methods of manufacturing rotor blade components for a wind turbine and rotor blade components produced in accordance with such methods are disclosed. In one embodiment, the method generally includes providing a mold of the rotor blade component; coating at least a portion of an interior surface of the mold with an elastomeric material; inserting impletion material within the mold so as to at least partially reduce an open internal volume within the mold; inserting a foam material within the mold; and, removing the rotor blade component from the mold, wherein the elastomeric material forms a cover skin around at least a portion of the rotor blade component. In an alternative embodiment, the method includes providing at least one support member defining a profile for the rotor blade component on a mold surface; coating at least a portion of the support member with an elastomeric material; and, allowing the elastomeric material to cure on the mold surface so as to form the rotor blade component.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: July 18, 2017
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: James Robert Tobin, Thomas Joseph Fischetti, William Max Gobeli
  • Patent number: 9701407
    Abstract: Disclosed is a drone having at least one rotor. The at least one rotor comprises a mast and at least two blades having a proximal end and a distal end. The at least two blades are arranged in connection with the mast by their proximal ends. The at least one of the blades comprises an electrically conductive element extending a distance D between its distal end and its proximal end. The electrically conductive element is electrically coupled with means for stopping the blades, thus forming an electrical circuit. The means for stopping the blades is arranged to be actioned when at least one electrical property of the electrical circuit change.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: July 11, 2017
    Assignee: Sharper Shape Oy
    Inventors: Atte Korhonen, Tero Heinonen
  • Patent number: 9677538
    Abstract: A wind turbine rotor blade assembly and associated method include a rotor blade having a pressure side, a suction side, a leading edge, and a trailing edge extending in a generally span-wise direction between a tip and a root. An edge extension panel is attached along either of the leading edge or trailing edge (or along both edges) in a generally span-wise direction from adjacent the root towards the tip. The edge extension panels include a cured and hardened viscous material continuous core formed onto the leading or trailing edge with a contoured generally aerodynamic outer surface.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: June 13, 2017
    Assignee: General Electric Company
    Inventors: Aaron John Mashue, Bruce Clark Busbey, Christian A. Carroll
  • Patent number: 9638165
    Abstract: It is described a blade for a wind turbine for converting wind energy into electric energy, including: a blade structure longitudinally extending along a blade axis (X1) and including a blade tip, an opposite blade root, a longitudinal leading edge portion and a longitudinal trailing edge portion which are extended between the blade root and the blade tip; and an outer aerodynamic shell defining an airfoil including an airfoil leading edge, an airfoil trailing edge and an airfoil suction side and an airfoil pressure side between the airfoil leading and trailing edges.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: May 2, 2017
    Assignee: ENEL GREEN POWER, S.P.A.
    Inventors: Luigi La Pegna, Renzo Piano
  • Patent number: 9611833
    Abstract: A blade (10) for a rotor of a wind turbine having a profiled contour divided into: a root region (30), an airfoil region (34), and a transition region (32) between the root region (30) and the airfoil region (34). A shoulder (40) is located at the boundary between the transition region (32) and the airfoil region (34). The blade's profiled contour comprises a local relative thickness defined as the local ratio between a maximum profile thickness (t) and the chord length (c). The ratio between the shoulder width (W) and the blade length (L) being less than or equal to 0.075, and the relative thickness (t/c) in a blade length interval of 0-0.8 L is at least 22%.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: April 4, 2017
    Assignee: LM GLASFIBER A/S
    Inventors: Jesper Madsen, Christian Frank Andersen, Peter Fuglsang
  • Patent number: 9550332
    Abstract: Tapered layers of pre-cured composite material are integrated into a tapered, highly stressed laminate structure in order to provide improved compressive strength. The pre-cured composite material can advantageously be cured under tension as pultruded material, to further augment compressive strength. The thickness of composite layers can be tapered on their termination edges by mechanically abrading, chemical abrading, or other methods. Especially preferred embodiments include aircraft structural components such as wings, wing spars, wing skins, fuselage skins, rotor blades, propellers, and propeller blades. Preferred laminates can be constructed to have at least 6, 10, 30, 50, or 100 layers of material, and can have a maximum thickness of at least 0.15, 0.25, 0.5, 1.0, or 5.0 inches.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: January 24, 2017
    Inventor: Abe Karem
  • Patent number: 9534580
    Abstract: A fluid turbine blade and method of fabrication are provided. The fluid turbine blade includes a centrally disposed longitudinal spar having a substantially circumferential cross section. The fluid turbine blade also includes at least one chord stiffener coupled to the longitudinal spar. The fluid turbine blade further includes a torsionally compliant segmented skin coupled to the at least one chord stiffener. The centrally disposed longitudinal spar and the torsionally compliant segmented skin are functionally decoupled to relieve the torsionally compliant segmented skin of one or more of a flapwise load condition, an edgewise load condition and a torsional load condition.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: January 3, 2017
    Assignee: General Electric Company
    Inventors: Chandra Sekher Yerramalli, Peggy Lynn Baehmann, Ken Ivcar Salas, Mohammad Salah Attia, Haifeng Zhao
  • Patent number: 9523280
    Abstract: A blade comprises a lightweight core, a composite material disposed on the core, and a skin located on the composite material. The composite material comprises fibers incorporated into a thermoplastic resin matrix in the form of a prepreg sheet or wet layup. The rotor blade may also comprise a front edge member attached along at least a portion of a leading edge of the core, a rear edge member attached along at least a portion of a trailing edge of the core, and a skin located over the core, the front edge member, and the rear edge member. The rotor blade may also comprise a spar extending through the core along a longitudinal axis of the rotor blade, and a skin located over the core and the spar. The edge members and the spars may be fabricated from thermoplastic material.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: December 20, 2016
    Assignee: PolyOne Corporation
    Inventors: Edward Pilpel, Benjamin D. Pilpel, Jr.
  • Patent number: 9506452
    Abstract: A method for installing a shear web insert between a blade segment and a blade insert of a rotor blade assembly is disclosed. The blade segment may include a first shear web and the blade insert may include a second shear web. The method may generally include coupling a first positioning device along an inner surface of a first side of the rotor blade assembly, inserting the shear web insert horizontally between the first and second shear webs until a first side face of the shear web insert engages the first positioning device and coupling a first retention device along the inner surface of the first side of the rotor blade assembly so that the first retention device is positioned adjacent to a second side face of the shear web insert, wherein the second side face is opposite the first side face.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: November 29, 2016
    Assignee: General Electric Company
    Inventors: Willem Jan Bakhuis, Darren John Danielsen
  • Patent number: 9487290
    Abstract: A rotor blade for an aircraft includes a composite portion having fiber-reinforced resin material, the composite portion having an outside surface that forms at least a partial airfoil shape. The weighted portion includes a plurality of weighted material layers and a plurality of fiber-reinforced resin material layers. Weighted material is configured to be compatible with and integrated into composite manufacturing processes used to fabricate the rotor blade. The weighted portion has a higher density than the composite portion and positioned to produce desired mass balance characteristics of the rotor blade.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: November 8, 2016
    Assignee: Textron Innovations Inc.
    Inventors: Paul B. Sherrill, Frank B. Stamps, Ronald J. Measom
  • Patent number: 9365285
    Abstract: The invention relates to a propeller blade which comprises a hollow casing (1) forming an extrados (5) and an intrados (4) which extend from a blade shank to a free end in the direction of the span, and a framework which is arranged in the hollow casing (1) and comprises a box spar (8), having a plurality of soles (9a, 9b, 10a, 10b) in surface contact with the hollow casing (1) so as to provide structural support for the hollow casing (1), and at least two cavities (15, 16) which are spaced apart in the direction of the chord (25), wherein the propeller blade further comprises at least two reinforcing spars (6, 7) which extend between the framework and the hollow casing.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: June 14, 2016
    Assignee: RATIER FIGEAC
    Inventors: Stanislas Tutaj, Bruno Petellaz
  • Patent number: 9333684
    Abstract: A method of the present disclosure includes of repairing a core stiffened structure with structural foam. Another method includes splicing core members together using structural foam. Another method includes joining a core member to a structure using structural foam. Another method includes using structural foam to stabilize a core member during a machining process. Another method includes stabilizing a core member with structural foam to prevent the core member from crushing in autoclave pressure. The present disclosure further includes a core stiffened structure have a core member with structural foam therein.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: May 10, 2016
    Assignee: Bell Helicopter Textron Inc.
    Inventors: Ramesh Thiagarajan, Robert Mark Chris, John R. McCullough, Suvankar Mishra
  • Patent number: 9302764
    Abstract: A blade (1) provided with a fitting (2) for fastening to a hub and with an airfoil element (10) having a spar (20) extending spanwise from an attachment zone (21) towards a distal zone (22), said attachment zone (21) surrounding a centrifugal force transmission bushing (31) that is connected to said fitting (2) by a through pin (3). The blade comprises a twisting force transmission member (40) provided with a first half-shell (41) and with a second half-shell (42) that together surround said attachment zone (21), each half-shell (41, 42) having a perforated first portion (43?, 43?) giving visual access to said bushing (31) when said airfoil element is removed from the fitting, and a second portion (44?, 44?) co-operating with a torsion box (50) surrounding said distal zone (22), said transmission member (40) being secured to said fitting in rotation about a torsion axis (AX) of the blade (1).
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: April 5, 2016
    Assignee: AIRBUS HELICOPTERS
    Inventors: Laurent Bianchi, Nicolas Isidore, Jacques Gaffiero, Bernard Michel
  • Patent number: 9290941
    Abstract: A modular fiber reinforced plastic flange for a structural composite beam which comprises a body formed of a plurality of elongate elements arranged in an array, wherein the dimensions of the body are substantially determined by the number and arrangement of the elongate elements in the array, and a skin member at least partially surrounding the array. Also, a structural composite beam comprising the modular fiber reinforced plastic flange and a shear web connected to the skin member of the modular flange. A method of making the modular flange and beams, and a kit of parts for making the modular flange are also disclosed.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: March 22, 2016
    Assignee: Blade Dynamics Limited
    Inventors: Paul Trevor Hayden, Harald Behmer
  • Patent number: 9249851
    Abstract: A method and apparatus for reducing a vibratory response in a structure using a tuning object. A selected mass may be identified for the tuning object. A plurality of channels may be formed in a workpiece having a mass greater than the selected mass to form the tuning object having the selected mass. The tuning object may be bonded to the structure using an adhesive bond to reduce the vibratory response of the structure.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: February 2, 2016
    Assignee: THE BOEING COMPANY
    Inventors: Frank Joseph Gill, III, Russell Eddy Fay
  • Patent number: 9221120
    Abstract: An airfoil includes, among other possible things, a main body extending between a leading edge and a trailing edge. Channels are formed into the main body, with a plurality of ribs extending intermediate the channels. A cover skin is attached to the main body. The cover skin is welded to the main body at outer edges. An adhesive is placed between inner surfaces of the cover skin and the main body. The adhesive is deposited inwardly of the outer edges of the cover skin.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: December 29, 2015
    Assignee: United Technologies Corporation
    Inventors: Frederick M. Schwarz, Michael A. Weisse
  • Patent number: 9169732
    Abstract: A wind turbine blade may include a plurality of longitudinal composite members each having a fiber and resin layer around a predetermined cross-sectional shape and each comprising at least one longitudinal outer surface and at least one longitudinal mounting surface, each of the outer surfaces of the plurality of longitudinal composite members corresponding to a different portion of a desired airfoil shape, the plurality of longitudinal composite members assembled such that the outer surfaces of the composite members form at least a majority of the airfoil shape. An outer skin may be provided. The composite members may be made up of transportable segments. A method of assembly may include transporting the segments to a desired location such as an installation site for assembly of the wind turbine blade at the installation site.
    Type: Grant
    Filed: May 6, 2014
    Date of Patent: October 27, 2015
    Assignee: A&P Technology, Inc.
    Inventors: Mike S. Braley, Andrew A. Head, Phillip M. Lariviere, Victor M. Ivers
  • Patent number: 9168998
    Abstract: A method and apparatus comprising a composite spar. The composite spar has a root section and a main section. The root section is closed and has a shape configured to be connected to a blade retention system. The main section has an open channel. The composite spar is configured for placement inside of a blade.
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: October 27, 2015
    Assignee: THE BOEING COMPANY
    Inventor: John Henry Moselage, III
  • Patent number: 9168999
    Abstract: A propeller blade includes a foam core having a slot formed through it from a camber side to a face side, an internal stiffener disposed through the slot and including flanges in contact with both the camber and face sides and a structural layer that surrounds at least a portion of the foam core and in contact with the flanges on both the camber and face sides.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: October 27, 2015
    Assignee: Hamilton Sundstrand Corporation
    Inventors: David P. Nagle, Paul A. Carvalho
  • Patent number: 9144944
    Abstract: Apparatus and methods are disclosed for manufacture of a composite rotor blade spar having non-uniform wall thickness. Tooling for manufacturing include a first mold defining a first mold surface and a second mold comprising a rigid layer and a heated layer secured to the rigid layer and defining a second mold surface. A plurality of heating elements embedded in the second mold are activated according to a plurality of different temperature progressions effective to cure portions of the uncured composite blade spar positioned between the first and second mold surfaces coextensive with each heating element of the plurality of heating elements. In some embodiments, the second mold defines a root portion and first and second branch portions. A shear web is placed between the first and second branch portions and is bonded to a blade spar skin surrounding the second mold during curing of the blade spar skin.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: September 29, 2015
    Assignee: Groen Brothers Aviation, Inc.
    Inventor: Robert Owen White
  • Patent number: 9068559
    Abstract: The invention relates to a rotor blade for a wind turbine. The rotor blade comprises a shell and a spar forming a longitudinally extending hollow structure within the shell and comprising: a leading web, a trailing web, and one or more additional webs. Each additional web defines an intermediate portion between a hub end and a tip end. The intermediate portion of each additional web is spaced apart from the leading and trailing webs and at least one of the tip and the hub ends is connected to or integral with the leading or the trailing web. The invention further relates to a wind turbine comprising the rotor blade, and a method for manufacturing the rotor blade.
    Type: Grant
    Filed: February 15, 2010
    Date of Patent: June 30, 2015
    Assignee: Vestas Wind Systems A/S
    Inventors: Mark Hancock, Andrew Hedges, Rens Christiaan Verhoef, Anton Bech, Tomas Vronsky
  • Patent number: 9045986
    Abstract: A rotor blade (1) provided with an outer covering (2) and with at least one load take-up spar (10) associated with at least one pin-receiving bushing (3). Each spar (10) is a compartmentalized spar comprising centrifugal force take-up means (20) incorporated within a twisting stress take-up casing (30), said centrifugal force take-up means (20) comprising at least two boxes (21, 22), each having said pin-receiving bushing (3) of the spar (10) passing therethrough, each box (21, 22) including a closed retention belt (23) extending in the spanwise direction of the blade, the retention belt (23) of one box (22) surrounding the retention belt (23) of another box (21), each retention belt (23) being provided with unidirectional fibers (24) wound around said pin-receiving bushing (3), said casing (30) being provided with inclined fibers (31) presenting an angle relative to said unidirectional fibers (24).
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: June 2, 2015
    Assignee: Airbus Helicopters
    Inventors: Laurent Bianchi, Jacques Gaffiero, Alain Charreyre, Francois Marchand
  • Patent number: 9033672
    Abstract: Wind turbine rotor blades with a reduced radar cross sections include a shell having a leading edge opposite a trailing edge, a structural support member that supports the shell and is disposed internal the wind turbine rotor blade between the leading edge and the trailing edge and extends for at least a portion of a rotor blade span length, wherein the structural support member comprises fiberglass, one or more cavities internal the wind turbine rotor blade, and a lightweight broadband radar absorbing filler material disposed in at least one of the one or more cavities to provide the reduced radar cross section.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: May 19, 2015
    Assignee: General Electric Company
    Inventors: Russell Craig Baucke, John Matthew Prescott, Lesly Sue Walters
  • Patent number: 9032622
    Abstract: An elongate web is attached to the root end of a spar of a wind turbine rotor blade to provide additional support along the width of the blade. The root end is formed by a winding operation, and a recess is then cut into the surface of the spar. The recess is defined by a relatively large first, cylindrical surface, which is coaxial with the longitudinal axis of the root end, and a relatively small second, conical surface. A tapered end of the elongate web is attached within the recess of the root end using a layer of suitable adhesive and an array of pins. Resilient spacer elements are arranged within the recess so as to surround the pins. The large area of the cylindrical surface causes the tensile and compressive stresses which arise along the elongate web in use to be transmitted to the spar as shear stresses.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: May 19, 2015
    Assignee: Vestas Wind Systems A/S
    Inventors: Mark Hancock, Anton Bech, Rens Christiaan Verhoef, Adrian Gill, Karl Gregory
  • Patent number: 9033671
    Abstract: Wind turbine rotor blades include a shell having a leading edge opposite a trailing edge, a structural support member that supports the shell and is disposed internal the wind turbine rotor blade between the leading edge and the trailing edge and extends for at least a portion of a rotor blade span length, and a resistive cellular support structure disposed at least partially about the wind turbine rotor blade that physically supports at least a portion of the wind turbine rotor blade and at least partially absorbs radar energy.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: May 19, 2015
    Assignee: General Electric Company
    Inventor: Russell Craig Baucke
  • Patent number: 9011102
    Abstract: A blade (1) having a working shell (10) defining an inner space (16). The blade has a leading-edge space (31) and at least one filler means (40, 50) in said inner space (16) and a leading-edge fairing (20) protecting the working shell (10). The fairing (20) extends from a pressure-side part (21) to a suction-side part (22) via a central part (23). The working shell (10) has in the first zone (13): a pressure-side portion (131), a central portion (133), and a suction-side portion (132). The pressure-side portion (131) is secured to the pressure-side part (21). The suction-side portion (132) is secured to the suction-side part (22). The blade (10) includes first damper means (60) with damping material.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: April 21, 2015
    Assignee: Airbus Helicopters
    Inventors: Sandrine Lemaire, Robert Leschi, Cédric Lanouette
  • Patent number: 9011103
    Abstract: The invention relates to a rotor blade (10) of a wind power plant and a method for fabricating a rotor blade (10) of a wind power plant and a manufacturing mold (54, 50) for a belt (28-31). The invention is characterized by a belt pair (28, 29, 30, 31) in which two belts (28, 29, 30, 31) are connected together in a form-fit and/or force-fit and material fit connection, where the belts (28-31) have a complementary shape in a joining area (50).
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: April 21, 2015
    Assignee: Senvion SE
    Inventors: Mario Kontis, Jens Kulenkampff
  • Publication number: 20150098833
    Abstract: Prepregs and stacks of prepregs based on reactive epoxy resins that can be cured at lower externally applied temperatures such as from 70° C. to 110° C. with acceptably short cycle times comprise epoxy resins of epoxy equivalent weight from 200 to 500 containing a curing agent but no hardener.
    Type: Application
    Filed: December 21, 2012
    Publication date: April 9, 2015
    Applicant: HEXCEL HOLDING GMBH
    Inventors: Wilhelm Pointer, Thorsten Ganglberger
  • Publication number: 20150064013
    Abstract: A composite assembly has an outer spar component having an outer spar component inner profile, an inner spar component having an inner spar component outer profile substantially complementary to the outer spar component inner profile, and an adhesive disposed between the outer spar component and the inner spar component.
    Type: Application
    Filed: August 30, 2013
    Publication date: March 5, 2015
    Applicant: Bell Helicopter Textron Inc.
    Inventors: Ronald J. Measom, Mitchell Elvin Rains
  • Patent number: 8967976
    Abstract: A wind turbine blade transversely divided in an inboard module (13) and an outboard module (33) provided on their end sections with connecting means, comprising, respectively, an inboard spar (15), an inboard upper shell (17) and an inboard lower shell (19); an outboard spar (35), an outboard upper shell (37) and an outboard lower shell (39); and arranged so that the aerodynamic profile of said inboard and outboard modules (13, 33) is defined by said upper and lower shells (17, 19; 37, 39), in which the inboard spar (15) is composed of two cap prefabricated panels (21, 23) and two web prefabricated panels (25, 27), and the outboard spar (35) is composed of first and second prefabricated panels (41, 43) integrating its caps (45, 47) and webs (49, 51). The invention also refers to a method of fabricating said wind turbine blade.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: March 3, 2015
    Assignee: Gamesa Innovation & Technology, S.L.
    Inventors: Eneko Sanz Pascual, Ion Arocena De La Rua, Victor Isla Valles, Sandra Arroz Collado, Luis Alberto Mayor Moreno, Iñaki Hermosilla Azanza, Andoni Rosende Moreno
  • Fan
    Patent number: 8961109
    Abstract: A fan includes a frame, rotor supported by this frame and having a central hub and a number of blades and a drive mechanism for rotatably driving the rotor, in addition to a ring to which the end zones of the blades are connected. The ring is assembled from two part-rings of the same form which each include a circular strip of sheet material, the free ends of which are mutually connected to form the outer surface of a truncated cone, and a third part-ring which mutually connects the inner edges of the first two part-rings. The end zones of the blades are connected to the third part-ring. The ring has a diameter of more than about 1.50 m. The number of blades amounts to at least eight. The blades are hollow and include a framework structure which is provided with a skin connected thereto.
    Type: Grant
    Filed: October 6, 2008
    Date of Patent: February 24, 2015
    Assignee: Bronswerk Heat Transfer B.V.
    Inventor: Augustinus Wilhelmus Maria Bertels
  • Patent number: 8961143
    Abstract: A rotor blade of a wind power plant in which the rotor blade has a longitudinal extension that extends from a rotor blade root substantially to a rotor blade tip. At least in one region of the rotor blade, an aerodynamic cross-sectional profile is provided, which has a leading edge (nose) and a trailing edge, which are connected via a suction side and a pressure side of the cross-sectional profile. The rotor blade is subdivided at least in a longitudinally extended section into a front rotor blade section with the leading edge and a rear rotor blade section with the trailing edge. The rear region of the front rotor blade section and the adjacent front region of the rear rotor blade section are connected through an I-beam.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: February 24, 2015
    Assignee: Repower Systems AG
    Inventors: Jens Kulenkampff, Claus Weegen, Mario Kontis
  • Publication number: 20150050156
    Abstract: Embodiments of the present application generally provide for wind turbine blade spar caps comprising composite materials prepared using a low viscosity resin system and a high density fabric and methods for their manufacture. In particular embodiment, the low viscosity resin system has a viscosity in the range of about 1 to about 100 centipoises at a temperature in the range of about 0° C. to about 125° C. during the preparation of the composite material. By using low viscosity resin systems, composite materials have been prepared having a fiber volume fraction of greater than about 65% and a composite modulus of greater than 48000 MPa.
    Type: Application
    Filed: October 29, 2014
    Publication date: February 19, 2015
    Inventors: Wendy Lin, Rainer Koeniger, Rachel Marie Suffield, Mohamad Sultan, Jason Testa
  • Patent number: 8956115
    Abstract: A rotor blade assembly for a wind turbine, and a method for installing a rotor blade assembly on a wind turbine, are disclosed. The rotor blade assembly includes a rotor blade having exterior surfaces defining an aerodynamic profile including a pressure side and a suction side extending between a leading edge and a trailing edge. The rotor blade further extends in a generally span-wise direction between a root and a tip. The rotor blade assembly further includes a blade extension extending in the generally span-wise direction from the root towards the tip, and a plurality of connection devices connecting the blade extension to the rotor blade. Each of the plurality of connection devices includes a mechanical fastener extending through the root in the generally span-wise direction for connecting the rotor blade to a hub of the wind turbine.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: February 17, 2015
    Assignee: General Electric Company
    Inventors: James Robert Tobin, Aaron John Mashue
  • Patent number: 8956105
    Abstract: A turbine vane for a gas turbine engine may include a composite airfoil structure. The composite airfoil structure may have an opening. The turbine vane may include a spar. The spar may have a body, which may be disposed within the opening. A standoff structure may be disposed within the opening. In some non-limiting embodiments, a cooling air gap may be defined between the body and an internal surface of the composite airfoil structure.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: February 17, 2015
    Assignee: Rolls-Royce North American Technologies, Inc.
    Inventors: Richard C. Uskert, Ted Joseph Freeman, David J. Thomas
  • Patent number: 8944365
    Abstract: A rotorcraft may include an airframe and a rotor connected to the airframe. The rotor may include a hub and a rotor blade connected to the hub to extend radially away therefrom. The rotor blade may include biasing fibers, oriented to increase the twist of the rotor blade in response to an increase in the speed of rotation of the rotor corresponding to a mission, task, or maneuver.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: February 3, 2015
    Assignee: Groen Brothers Aviation, Inc.
    Inventor: David L. Groen
  • Publication number: 20150023799
    Abstract: Disclosed is an engineered structure which includes pultrusions usable for resisting a bending load.
    Type: Application
    Filed: July 19, 2013
    Publication date: January 22, 2015
    Inventors: Kyle K. Wetzel, Ryan Michael Barnhart, Teeyana S. Wullenschneider, Alexander R. Tran, Ken T. Lee
  • Patent number: 8918997
    Abstract: A method provides for assembling a wind turbine blade from at least two blade segments, with each of the blade segments having a pressure side shell member, a suction side shell member, internal support structure, and ends with joint sections that are offset span-wise from the pressure side shell member to the suction side shell member. The blade segments are aligned in an end-to-end orientation and moved into a mating configuration with relative movement that includes overlapping the respective joint sections of adjacent blade segments. The overlapped joint sections are subsequently moved into engagement with each other and joined along respective joint profiles at a chord-wise joint.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: December 30, 2014
    Assignee: General Electric Company
    Inventors: Steven Alan Kyriakides, Scott Gabell Riddell, Alan Majors Walker
  • Publication number: 20140377076
    Abstract: A joint assembly is provided. The joint assembly includes a first component formed from a first material and a second component including a portion that extends at least partially into the first component and that has an uneven outer profile. The first material is configured to form the first component into a shape that is substantially complementary to a shape of the portion to facilitate restricting movement of the second component in an axial direction.
    Type: Application
    Filed: June 25, 2013
    Publication date: December 25, 2014
    Inventors: Dennis K. Kennedy, Zach K. Stahlecker, Saul Opie
  • Publication number: 20140363303
    Abstract: A hybrid turbine blade having a box beam assembly structure and method of designing such a hybrid turbine blade are disclosed. The box beam assembly provides the primary structure for supporting loads on the blade, and comprises oppositely positioned spar caps joined by oppositely positioned shear webs. For a portion of the blade, the box beam assembly further comprises a root buildup. In one embodiment, the shear webs comprise foam core sandwiched between two biaxial fiber-reinforced plastic laminates (FRP), the spar caps comprise uniaxial FRP laminates, and the root buildup comprises triaxial FRP laminates. The blades are designed using a novel inside-out method, wherein the box beam is first designed to support expected loads, and an aerodynamic surface is then designed to be supported by the box beam. The blade may be constructed in segments that are joined with connectors that engage the box beam structure.
    Type: Application
    Filed: June 4, 2014
    Publication date: December 11, 2014
    Applicant: The Regents of the University of California
    Inventors: Perry M. Roth-Johnson, Richard E. Wirz
  • Patent number: 8898901
    Abstract: A method for manufacturing a blade spar for a wind turbine blade includes positioning a first spar segment having a first adhering portion; positioning a second spar segment having a second adhering portion at the first spar segment such that the first adhering portion and the second adhering portion are at least partially overlapping, wherein an adhesive is at least partially provided between the overlapping adhering portions; providing at least one fiber layer impregnated with an uncured resin on the outer surfaces of the first and second spar segments at least in the joint region of the first and second spar segments; and simultaneously curing the adhesive and the resin, thereby fixating the first and the second spar segments to each other.
    Type: Grant
    Filed: March 17, 2011
    Date of Patent: December 2, 2014
    Assignee: Vestas Wind Systems A/S
    Inventors: Jed Richter, Toby Collard, Andrew Hedges, Arne Haahr
  • Patent number: 8899936
    Abstract: The invention provides a method of manufacturing a spar for a wind turbine blade. The method includes providing at least two caps, each cap forming an intermediate portion between two end portions, where the end portions each forms a cap joint surface portion along a longitudinal extending edge of the end portion and the intermediate portion forms an outer surface portion of the spar, providing at least two webs, each web being provided with web joint surface portions along opposite and longitudinally extending edges, and connecting the joint surface portions of the caps with the joint surface portions of the webs to form a tubular configuration of the spar. The caps are provided so that the end portions extend transversely to the intermediate portion and the caps are arranged relative to each other so that the end portions of one cap extend from the intermediate portion towards the end portions of another cap.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: December 2, 2014
    Assignee: Vestas Wind Systems A/S
    Inventors: Mark Hancock, Andrew Hedges, Tomas Vronsky
  • Publication number: 20140348651
    Abstract: The present invention relates to a reinforced blade for a wind turbine, particularly to a blade having at least one elongated reinforcing member connected inside the shell for increasing the strength of the blade, each of the at least one elongated reinforcing member having a first end and a second end and extending in a longitudinal direction between the first end and the second end and wherein the first end is connected to the upper part of the shell and the second end is connected to the lower part of the shell thereby decreasing peeling and shear stresses in the trailing edge of the blade.
    Type: Application
    Filed: August 6, 2014
    Publication date: November 27, 2014
    Inventor: Find Mølholt JENSEN
  • Publication number: 20140341746
    Abstract: A main rotor blade assembly is provided including a spar which comprises a main section. A main core is positioned adjacent a trailing side of the main section of the spar. A tip assembly includes a main tip core and a tip end pocket core. The tip assembly is positioned adjacent an outboard end of the main core and the spar such that the main tip core is substantially aligned with a longitudinal axis of the main core and the tip end pocket core is substantially aligned with a longitudinal axis of the spar. At least a portion of both the main tip core and the tip end pocket core comprises a high density core. An upper composite skin and a lower composite skin extend over the spar, the main core, the main tip core, and the tip end pocket core. A portion of the upper composite skin and the lower composite skin has a thickness sufficient to be load bearing.
    Type: Application
    Filed: May 14, 2013
    Publication date: November 20, 2014
    Applicant: Sikorsky Aircraft Corporation
    Inventors: Kevin P. Leahy, Richard Joseph Simkulak
  • Patent number: 8888463
    Abstract: The invention relates to a rotor blade for wind energy installation, comprising at least one flange running in a longitudinal direction from a rotor blade root to a rotor blade tip, whereby a width of the flange decreases along the longitudinal direction. The invention also relates to a method for producing a rotor blade in that at least one flange with a width decreasing in the longitudinal direction is applied to a rotor blade inner wall, and to a laying assistance device for positioning strips of the flange.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: November 18, 2014
    Assignee: REpower Systems AG
    Inventor: Matthias Schubert
  • Publication number: 20140334930
    Abstract: A blade (10) for a rotor of a wind turbine (2) is disclosed. The blade is assembled from an inboard blade part (50) closest to the hub and an outboard blade part (110) farthest from the hub of the wind turbine. The inboard part (50) comprises a load carrying structure (60) with a first aerodynamic shell (70) fitted to the load carrying structure (60), and the outboard part (110) comprises a blade shell (141, 143) with a load carrying structure (142, 144) integrated in the blade shell (141, 143).
    Type: Application
    Filed: December 20, 2012
    Publication date: November 13, 2014
    Inventors: Fons Rob, Jesper Madsen, Flemming Ejlersen, Peter Quiring
  • Patent number: 8882469
    Abstract: The present invention provides a structural element, in particular for an aircraft or spacecraft, comprising a core, the material density of which varies, at least in portions, in order to optimize the natural vibration behavior of the structural element. The present invention further provides a method for producing a structural element, in particular for an aircraft or spacecraft, comprising the following steps: providing a structural element which has a core; determining the natural vibration behavior of the structural element; and varying the material density of the core of the structural element, at least in portions, in such a way that the natural vibration behavior of the structural element is optimized. The present invention provides still further an aircraft or spacecraft and a rotor blade, in particular for a wind turbine, comprising such a structural element.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: November 11, 2014
    Assignee: Airbus Operations GmbH
    Inventors: Ichwan Zuardy, Karim Grase, Wolfgang Voege, Axel Herrmann
  • Patent number: 8870546
    Abstract: Edgewise stiffness of a wind turbine blade is enhanced by arranging a tension element between anchor points at the ends of a load bearing member in the turbine blade such as a spar or a beam. The tension element is spaced away from the load bearing member on the trailing edge side of the load bearing member by struts and acts as a suspension cable. Several tension elements may be used and a similar tension element may be arranged on the leading edge side of the load bearing member.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: October 28, 2014
    Inventor: Carsten Hein Westergaard