| LM GLASFIBER A/S Patent applications |
| Patent application number | Title | Published |
|---|
| 20120103513 | MOVABLE INJECTION PASSAGES DURING THE MANUFACTURING OF LAMINATES - The present invention relates to a method of manufacturing a laminate with the formation of underpressure between a mould ( | 05-03-2012 |
| 20120090769 | METHOD AND MANUFACTURING LINE FOR MANUFACTURING WIND TURBINE BLADES - A method and a manufacturing line for manufacturing wind turbine blades having a composite shell structure comprising a matrix material and a fibre reinforcement material by use of a resin transfer moulding process. The method comprises a manufacturing line, where wind turbine blades are formed in a number of moulds. Each number of moulds comprising at least a first mould part comprising a first mould cavity. The manufacturing line further comprises a gantry means movable along the manufacturing line. The method comprises the following steps: a) arranging fibre reinforcement material in the first mould cavity of a first mould using the gantry means, b) moving the gantry means along the manufacturing line to a second mould, c) supplying curable matrix material into the first mould cavity of the first mould, while substantially simultaneously arranging fibre reinforcement material in the first mould cavity of a second mould using the gantry means. The manufacturing line comprises a plurality of moulds for forming wind turbine blades. Each of the number of moulds comprising at least a first mould part comprising a first mould cavity. | 04-19-2012 |
| 20120070299 | WIND TURBINE BLADE - A blade for a rotor of a wind turbine has a root region with a substantially circular or elliptical profile closest to the hub and an airfoil region with a lift generating profile furthest away from the hub. A transition region has a base part with an inner dimension that varies linearly in the radial direction of the blade in such a way that an induction factor of the first base part without flow altering devices at a rotor design point deviates from a target induction factor. The first longitudinal segment is provided with a number of first flow altering devices arranged so as to adjust the aerodynamic properties of the first longitudinal segment to substantially meet the target induction factor at the design point. | 03-22-2012 |
| 20120070281 | METHOD OF OPERATING A WIND TURBINE - A wind turbine is operated with a blade in which a transition region is provided between a root region with a substantially circular or elliptical profile closest to a hub and an airfoil region with a lift generating profile furthest away from the hub. The transition region has a base part with an inherent non-ideal aerodynamic design so that a substantial longitudinal part of the base part without flow altering devices at a design point deviates from a target axial induction factor. A pitch of the blade and a rotational speed are adjusted to meet the target axial induction factor of the second longitudinal segment, and flow altering devices are provided so as to meet the target axial induction factor of the first longitudinal segment. | 03-22-2012 |
| 20120067515 | METHOD OF MANUFACTURING A COMPOSITE STRUCTURE WITH PREFABRICATED REINFORCEMENT ELEMENT - A method of manufacturing a longitudinally extending composite structure including a shell part comprising a fibre reinforced polymer material including a polymer matrix and fibre material embedded in the polymer material is described. The shell part is manufactured in a closed mould comprising at least a first outer mould part having a first forming surface and a second outer mould part having a second forming surface. The method comprises the steps of: arranging a first fibre material in the first forming surface of the first outer mould part, arranging a pre-fabricated longitudinally extending reinforcement element, such as a beam or a web, on top of the first fibre material, arranging a second fibre material in the second forming surface of the second outer mould part, and sealing a polymer foil above the second fibre material so as to retain the second fibre material against the second forming surface. | 03-22-2012 |
| 20120063913 | METHOD OF MANUFACTURING A WIND TURBINE BLADE HAVING PREDESIGNED SEGMENT - A blade for a rotor of a wind turbine is manufactured with a root region with a substantially circular or elliptical profile closest to the hub, an airfoil region with a lift generating profile furthest away from the hub and a transition region having a profile gradually changing the root region to the airfoil region. A first blade design is used for the first base part on a first longitudinal section of an airfoil region of a second blade, so that an induction factor of the first base part on the second blade deviates from a target induction factor. The first longitudinal section of the second blade is provided with flow altering devices so as to adjust the aerodynamic properties of the first longitudinal segment to substantially meet the target induction factor at the design point on the second blade. | 03-15-2012 |
| 20120063910 | WIND TURBINE BLADE WITH BASE PART HAVING INHERENT NON-IDEAL TWIST - A blade for a rotor of a wind turbine is divided into a root region closest to the hub and an airfoil region with a lift generating profile furthest away from the hub. A transition region has a profile gradually changing in the radial direction from the circular or elliptical profile of the root region to the lift generating profile of the airfoil region, and includes at least a first longitudinal segment extending along at least 20% of a longitudinal extent of the airfoil region. A base part has an inherent non-ideal twist, such as no twist, or a reduced twist compared to a target blade twist, so that an axial induction factor of the first base part at a design point deviates from a target axial induction factor. A number of flow altering devices are arranged so as to adjust the aerodynamic properties of the first longitudinal segment. | 03-15-2012 |
| 20120061007 | METHOD OF STRENGTHENING A WIND TURBINE BLADE AND THE STRENGTHENED BLADE - A method of repairing a wind turbine blade is described. The blade comprises a shell body comprising a fibre-reinforced polymer material. The blade is strengthened by use of a UV curable prepreg material having a first side and a second side. The method comprises the steps of: a) applying the UV curable, fibre-reinforced prepreg material to an area of application on an outer surface or an inner surface of the wind turbine blade with the first side of the prepreg material facing the area of application, and b) exposing the prepreg material to UV radiation for a predetermined amount of time so as to allow the prepreg to cure. | 03-15-2012 |
| 20120057987 | WIND TURBINE BLADE WITH BASE PART HAVING NON-POSITIVE CAMBER - A blade, for a rotor of a wind turbine has a profiled contour in a radial direction is divided into a root region with a substantially circular or elliptical profile closest to the hub and an airfoil region with a lift generating profile furthest away from the hub. A transition region between the root region and the airfoil region has a profile gradually changing in the radial direction from the circular or elliptical profile of the root region to the lift generating profile of the airfoil region, and the airfoil region comprises at least a first longitudinal segment extending at least 20% of a longitudinal extent of the airfoil region. The first longitudinal segment has a first base part with a cross-sectional profile such that, when impacted by an incident airflow at an angle of attack of 0 degrees has a lift coefficient, which is 0 or less. | 03-08-2012 |
| 20120057984 | WIND TURBINE BLADE PROVIDED WITH FLOW ALTERING DEVICES - A blade for a rotor of a wind turbine is divided into a root region closest to the hub and an airfoil region with a lift generating profile furthest away from the hub and a transition region. A base part of the transition region has an axial induction factor, which without flow altering device deviates at least 5% from a target axial induction factor. A number of first flow altering devices are arranged so as to adjust the aerodynamic properties of a longitudinal segment of the transition region to substantially meet the target axial induction factor. | 03-08-2012 |
| 20120024122 | METHOD AND APPARATUS FOR CUTTING OUT BALSA BLANKET PARTS - Method and apparatus for cutting out balsa blanket parts comprising the following steps: providing on a surface of a conveyor ( | 02-02-2012 |
| 20120021131 | METHOD OF APPLYING GELCOAT AND AN ARRANGEMENT PERFORMING SAID METHOD - The present invention relates in general to a method of manufacturing fibre-reinforced parts for a wind power plant, such as a blade, in an open mould. More specifically the invention relates to a process step of applying at least one layer of gelcoat on a interior surface of said open mould prior to arranging at least one layer of material comprising fibre and to an arrangement that can be used in performing said method. The process step comprises to apply the gelcoat from a first end portion of the mould and to a second end portion of the mould and to cover the open mould from said first end portion to said second end portion gradually as gelcoat is applied. The arrangement comprises means for applying gelcoat to the interior surface of the mould ( | 01-26-2012 |
| 20120009064 | WIND TURBINE BLADE WITH VARIABLE TRAILING EDGE - The present invention relates to a wind turbine blade for a rotor of a wind turbine having a substantially horizontal rotor shaft. The blade may comprise a profiled contour comprising a pressure side and a suction side as well as a leading edge and a trailing edge, a chord extending between the leading edge and the trailing edge, and the profiled contour generating a lift when being impacted by an incident airflow. In a cross section of the wind turbine blade perpendicular to a lengthwise direction of the wind turbine blade, a suction side point is defined on the suction side at the trailing edge of the blade, and a pressure side point is defined on the pressure side at the trailing edge of the blade. The suction side point is movable in relation to the pressure side point, and the blade is further provided with a displacement device configured to displace the pressure side point and the suction side point so that a distance between the suction side point and the pressure side point can be varied. The present invention further relates to a wind turbine including such a wind turbine blade and to a method of operating a wind turbine including such a wind turbine blade. | 01-12-2012 |
| 20120007269 | METHOD OF MANUFACTURING PRE-BENT WIND TURBINE BLADES - In a method of manufacturing a blade shell half of a pre-bent wind turbine blade by means of vacuum-assisted resin transfer moulding (VARTM), a fibre lay-up ( | 01-12-2012 |
| 20120003094 | WIND TURBINE BLADE WITH A LIGHTNING PROTECTION SYSTEM - The invention relates to a wind turbine blade with a lightning protection system, where the blade comprises a shell body made of a composite material and comprises a longitudinal direction with a root end and a tip end. The blade further comprises a profiled contour including a pressure side and a suction side, as well as a leading edge and a trailing edge with a chord having a chord length extending there between, the profiled contour, when being impacted by an incident airflow, generating a lift. The lightning protection system comprises at least one lightning receptor arranged freely accessible in or on the shell unit surface at or in the immediate vicinity of the tip of the blade. The lightning protection system further comprises a lightning down conductor made of electrically conductive material extending within the shell body from the lightning receptor to the root end of the blade. The lightning receptor and the lightning down conductor are electrically connected. The shell body comprises at least a first conductive layer extending along at least a longitudinal part of the lightning down conductor in a transverse distance therefrom. The first conductive layer is electrically isolated from the lightning down conductor and from the lightning receptor, and has a sheet resistance in the range 1-5 Mega Ohm per square. | 01-05-2012 |
| 20110316182 | METHOD AND MANUFACTURING LINE FOR MANUFACTURING WIND TURBINE BLADES - A method and a manufacturing line ( | 12-29-2011 |
| 20110297303 | METHOD OF LAYING A LAYER OF FIBRE MATERIAL AND THE RELATED APPARATUS - A method of and an apparatus for, manufacturing fibre-reinforced parts such as blades for wind power plants, whereby a number of layers ( | 12-08-2011 |
| 20110277929 | METHOD OF MANUFACTURING A LAMINATED PART FROM FIBRE MATERIAL - A method of manufacturing fibre-reinforced parts, such as blades, for wind power plants, whereby a number of layers ( | 11-17-2011 |
| 20110259511 | METHOD AND SYSTEM FOR MONITORING AND CONTROLLING THE MANUFACTURING OF PARTS FOR A WIND POWER PLANT - A method for monitoring and controlling that a plurality of layers ( | 10-27-2011 |
| 20110250076 | WIND TURBINE BLADE HAVING A SPOILER WITH EFFECTIVE SEPARATION OF AIRFLOW - A wind turbine blade with a flow guiding device attached to a profiled contour on a pressure side of the blade is described. The flow guiding device extends along at least a longitudinal part of a transition region of the blade and is arranged so as to generate a separation of airflow along at least a central longitudinal portion of the flow guiding device from the pressure side of the blade at a point between the flow guiding device and a trailing edge of the blade, when the blade is impacted by an incident airflow. The inflow surface, in at least the central longitudinal portion, is formed so that, for each transverse cross-section, a end point tangent to the inflow surface at the end point crosses the profiled contour at a crossing point, where the profiled contour has a profile tangent to the profiled contour, and wherein an angle between the profile tangent and the end point tangent is at least 45 degrees. | 10-13-2011 |
| 20110243753 | WIND TURBINE BLADE HAVING A FLOW GUIDING DEVICE WITH OPTIMISED HEIGHT - A wind turbine blade with a flow guiding device attached to a profiled contour on a pressure side of the blade is described. The flow guiding device extends along at least a longitudinal part of a transition region of the blade and is arranged so as to generate a separation of airflow along at least a central longitudinal portion of the flow guiding device from the pressure side of the blade at a point between the flow guiding device and a trailing edge of the blade, when the blade is impacted by an incident airflow. The flow guiding device is arranged at a relative chordal position, seen from the leading edge of the blade, lying in an interval between 40% and 92%. The relative height of the flow guiding device is at least 10% of a maximum thickness of the profiled contour. | 10-06-2011 |
| 20110225796 | PROVIDING A TRANSVERSE FILLING INSIDE AND ELONGATED NARROW CAVITY - A method for performing a task in a tight place in an elongated profile, preferably in a wing blade with an outer shell for a wind power plant, whereby at least one barrier is formed transversely of at least one elongated channel in the profile and a balloon for use in performing the task. The method may include the following steps: establishing a number of inspection and mounting holes in the surface of the shell, mounting at least one inflatable balloons in the at least one channel, filling the balloon(s) with air, and applying at least one first material layer between the sidewalls of the elongated channel and across the balloon(s), the layer preferably being expanding polyurethane foam. The applied layer of material fills cracks and gaps between balloons and wing parts, providing a load-bearing layer between these parts. An additional layer may subsequently be laid upon the former layer. | 09-22-2011 |
| 20110180209 | METHOD OF MANUFACTURING A WIND TURBINE BLADE SHELL PART COMPRISING A MAGNETISABLE MATERIAL - A method of manufacturing a wind turbine blade shell part comprising fibre material impregnated with cured resin is described. The method comprises the steps of: a) providing a first mould part having a first forming surface with a contour that defines at least a part of an outer surface of turbine blade shell part, b) arranging fibre material in the first mould part, the fibre material comprising fibres of a magnetisable material, c) providing a resin in the first mould part simultaneous with and/or subsequent to step b), and d) curing the resin in order to form the wind turbine blade shell part or wind turbine blade. The fibre material is retained against the first forming surface by use of magnet means during step b) and/or step c). | 07-28-2011 |
| 20110164987 | METHOD OF MANUFACTURING A WIND TURBINE BLADE COMPRISING STEEL WIRE REINFORCED MATRIX MATERIAL - A method of manufacturing a shell construction part of a wind turbine blade, the shell construction part being made of a fibre reinforced polymer material including a polymer matrix and fibre reinforcement material embedded in the polymer matrix. The method comprises the steps of a) providing a forming structure comprising a mould cavity and having a longitudinal direction, b) placing the fibre reinforcement material in mould cavity, c) providing a resin in the mould cavity simultaneously with and/or subsequently to step b), and d) curing the resin in order to form the composite structure, wherein at least 20% by volume of the fibre reinforcement material consists of metallic wires. | 07-07-2011 |
| 20110164984 | BLADE SECTION FOR A WIND TURBINE BLADE - A blade section for a wind turbine blade, the blade section extending along a longitudinal axis and having at least a first end, the blade section comprising a main blade section with a contour having an outer surface. The main blade section at the first end is provided with a number of connection elements, each connection element being pivotally engaged with the main blade section about a rotational axis. Each of the connection elements being provided with a joining means for anchoring each of the connection element to another blade section. The joining means of each of the number of connection elements is arranged in a distance from the rotational axis. | 07-07-2011 |
| 20110129646 | REGENERATING SURFACE PROPERTIES FOR COMPOSITES - This invention relates to a method for manufacturing a composite member, where a number of different material layers including at least one layer of gelcoat are applied in a mould, and where resin is applied for joining of the layers. The method is new in that particles are added to the gelcoat, whereby the gelcoat comprising such particles forms an outermost layer on at least a part of the manufactured composite member. Hereby is obtained a composite with a hydrophobic and lotus-like surface yielding good self-cleaning properties and which is on the same time self-regenerating. The invention furthermore relates to composite members comprising such a gelcoat layer with particles and to the use of gelcoat comprising particles for giving regenerating self-cleaning properties. | 06-02-2011 |
| 20110116929 | LIGHTNING DIVERTER FOR CONDUCTING A LIGHTNING-INDUCED ELECTRICAL CURRENT AND A METHOD OF PRODUCING THE SAME - The present invention concerns a method of producing a lightning diverter for conducting a lightning-induced electrical current, which is to be placed on structures such as wings on wind turbines, aircraft components, radomes and the like with the purpose of lightning protection. The method comprises the steps of making a plurality of holes in a plate of an electrically conductive material, filling said holes at least partly with one or more electrically non-conductive materials, and then finally dividing the plate—preferably into strips. The lightning diverter obtained hereby consists of a layer of electrically non-conductive material with a plurality of isolated segments of electrically conductive material. | 05-19-2011 |
| 20110104323 | FILTER FOR A RESIN VESSEL - A resin vessel including a sealed container ( | 05-05-2011 |
| 20110094428 | SEABORNE TRANSPORTATION OF WIND TURBINE BLADES - The present invention relates to a method for transporting a blade for a wind turbine, comprising the steps of lowering said wind turbine blade into water, whereby it floats, and transporting said blade in the water. The invention further relates to a wind turbine blade with its holes sealed, making the blade transportable by floating, and a blade comprising a keel, propeller and a rudder. | 04-28-2011 |
| 20110031763 | UPWIND WIND TURBINE WITH BLADES SUPPORTED ON THE LEEWARD SIDE - A wind turbine comprising a number of blades extending substantially radially from a rigid hub on a main shaft having a substantially horizontal axis. The blades together with the hub constituting a rotor with a rotor plane, which can be put into rotation by wind. The main shaft is pivotally mounted in a nacelle mounted on top of a tower, the nacelle being able to pivot around a vertical axis in relation to the tower, hereby being able to adjust the rotor plane of the blades in relation to a direction of the wind. The wind turbine is an upwind machine in that the rotor during normal use of the wind turbine is positioned on the upwind side of the tower. The rotor during normal use of the wind turbine having a windward side and a leeward side, and each blade having an innermost part comprising a root section of the blade and an outermost part comprising a tip section of the blade. Each blade is supported on the leeward side by at least a first leeward supporting means having a first end and a second end, the first end being connected to the blade at a first leeward mounting point positioned in a radial distance from the horizontal axis, and the second end being connected to a second leeward mounting point at a rotatable part of the wind turbine, the second leeward mounting point being positioned in an axial distance from the rotor plane on the leeward side of the rotor. | 02-10-2011 |
| 20110020128 | WIND TURBINE BLADE WITH AN AUXILIARY AIRFOIL - A blade for a rotor of a wind turbine having a substantially horizontal rotor shaft, the rotor comprising a hub, from which the blade extends substantially in a radial direction when mounted to the hub. The blade comprises a main blade part having a profiled contour comprising a pressure side and a suction side as well as a leading edge and a trailing edge with a chord extending between the leading edge and the trailing edge. The profiled contour generates a lift when being impacted by an incident airflow. The profiled contour is divided in the radial direction into a root region with a substantially circular or elliptical profile closest to the hub, the substantially circular or elliptical profile having a diameter, an airfoil region with a lift generating profile furthest away from the hub, and a transition region between the root region and the airfoil region. The profile of the transition region gradually changes in the radial direction from the circular or elliptical profile of the root region to the lift generating profile of the airfoil region. The blade further comprises a first auxiliary airfoil having a first pressure side and a first suction side as well as a first chord extending between a first leading edge and a first trailing edge. The first chord has a length that is 75% or less of the diameter of the substantially circular or elliptical profile in the root region and the first auxiliary airfoil is arranged so that it extends in the radial direction along at least a part of the root region of the main blade part with a distance there between. | 01-27-2011 |
| 20100326584 | METHOD AND APPARATUS FOR DETECTING LEAK IN A VARTM PROCESS - A method for producing a composite structure comprising fibre reinforced material by means of vacuum assisted resin transfer moulding is described. The fibre material is impregnated with liquid resin, and the method comprising the steps of: a) providing a forming structure comprising a rigid mould part and a second mould part, b) placing the fibre material in the rigid mould part, c) sealing the second mould part against the rigid mould part to form a mould cavity, d) connecting a source of uncured fluid resin to at least one resin inlet communicating with the mould cavity, e) connecting at least one vacuum outlet communicating with the mould cavity, f) evacuating the interior of the forming structure through the at least one vacuum outlet, g) supplying uncured resin from the source of uncured resin to the mould cavity through the at least one resin inlet so as to fill the mould cavity with resin, and h) curing the resin in order to form the composite structure. During the evacuation process of step f), an airflow level through the at least one vacuum outlet is measured. | 12-30-2010 |
| 20100304170 | METHOD OF PRODUCING A COMPOSITE STRUCTURE VIA INTERMEDIATE PRODUCTS, THE RELATED APPARATUS AND A COMPOSITE STRUCTURE OBTAINABLE BY THE METHOD - A method of producing a composite structure comprising fibre reinforced material and having a longitudinal direction is described. The method comprises the following steps: a) manufacturing a first structure comprising a first cured composite part having a first thickness and a longitudinal direction with a first end, and a number of first fibre layers extending from the first end, b) manufacturing a second structure comprising a second cured composite part having a second thickness and a longitudinal direction with a second end, and a number of second fibre layers extending from the second end, and c) arranging the first structure and the second structure so that the first end faces towards the second end, and arranging the first fibre layers and the second fibre layers so that at least a part of the first fibre layers overlap at least a part of the second fibre layers in the longitudinal direction, d) supplying liquid resin in order to impregnate the first fibre layers and the second fibre layers, and e) curing the liquid resin in order to form the composite structure comprising the first cured composite part, the second cured composite part, and an intermediate composite part including the first fibre layers and the second fibre layers. | 12-02-2010 |
| 20100290912 | WIND TURBINE BLADE AND HUB ASSEMBLY - This invention relates to a wind turbine blade with at least two connection members such as bushings and/or threaded bars in the root of the blade for attaching the blade to a hub. The connection members are placed along the blade surface and at least some of the connection members are non-parallel and hence oriented in different directions. Hereby is obtained that the root section of the blade can be shortened and the maximum chord of the wind turbine blade can be moved closer to the hub, whereby the part of the blade exploiting the wind is increased and the power output similarly increased. | 11-18-2010 |
| 20100278657 | WIND TURBINE BLADE AND BLADE ELEMENT COMBINATION AND METHOD OF CHANGING THE AERODYNAMIC PROFILE OF A WIND TURBINE BLADE - A blade element ( | 11-04-2010 |
| 20100260614 | WIND TURBINE BLADE WITH SUBMERGED BOUNDARY LAYER CONTROL MEANS COMPRISING CROSSING SUB-CHANNELS - A wind turbine blade having a longitudinal direction with a root end and a tip end as well as a chord extending in a transverse direction between a leading edge and a trailing edge is described. The blade comprises a flow control surface with a suction side and a pressure side. A number of boundary layer control means is formed in the flow control surface. The boundary layer control means include a channel submerged in the flow control surface with a first end facing towards the leading edge and a second end facing towards the trailing edge of the blade. The channel further comprises a bottom surface extending from the first end to the second end. The channel at the first end comprises a first channel zone comprising a first sub-channel having a first cross-sectional area and a second sub-channel having a second cross-sectional area, the first sub-channel and the second sub-channel crossing each other at a point of crossing. | 10-14-2010 |
| 20100209651 | METHOD FOR PRODUCING A COMPOSITE STRUCTURE AND A COMPOSITE STRUCTURE - A method for producing a composite structure and a composite structure obtained by the method is described. The method comprises the following steps: a) providing a mold comprising a rigid mold part and a flexible vacuum bag, b) placing a fiber insertion in the mold part, the fiber insertion including a plurality of fiber layers and, when placed in the mold part, having an upper surface and a lower surface as well as a first side and a second side, the fiber insertion including a first zone at the first side and a second zone at the second side, the first zone and the second zone being separated by an intermediate zone, c) placing an upper distribution medium above the intermediate zone of the fiber insertion, the distribution medium comprising a resin distribution network for distributing resin along the upper distribution medium, d) placing a number of resin inlet channels above the upper distribution medium for supplying liquid resin to the resin distribution network, e) placing a first vacuum outlet at least partially overlapping the first zone of the fiber insertion and a second outlet at least partially overlapping the second zone of the fiber insertion, f) placing the vacuum bag on top of the mold part, thus sealing the vacuum bag against the mold part to define a mold cavity, g) evacuating the mold cavity, h) connecting a source of uncured fluid resin to the resin inlet channels so as to feed uncured resin to the resin distribution network in order to fill the mold cavity and to impregnate at least the fiber insertion and the upper distribution medium with uncured resin, and i) allowing the resin to cure in order to form the composite structure. | 08-19-2010 |
| 20100209258 | BLADE FOR A ROTOR OF A WIND TURBINE PROVIDED WITH BARRIER GENERATING MEANS - A blade for a rotor of a wind turbine has a substantially horizontal rotor shaft, the rotor including a hub, from which the blade extends substantially in a radial direction when mounted to the hub. The blade includes a profiled contour including a leading edge and a trailing edge as well as a pressure side and a suction side, the profiled contour when being impacted by an incident airflow generating a lift. The profiled contour is divided into a root region with a substantially circular profile closest to the hub, an airfoil region with a lift generating profile furthest away from the hub, and a transition region between the root region and the airfoil region. The profile of the transition region gradually changes in the radial direction from the circular profile of the root region to the lift generating profile of the airfoil region. The suction side comprises at least a first zone, which extends substantially in the direction of the incident airflow, and which is positioned in a zone of a cross-flow. The first zone includes a first barrier generating means adapted to generating a barrier of airflow, which extends essentially in the direction of the incident airflow, the barrier of airflow being of sufficient strength and length so as to effectively reduce the cross-flow. | 08-19-2010 |
| 20100209257 | WIND TURBINE BLADE WITH SUBMERGED BOUNDARY LAYER CONTROL MEANS - A wind turbine blade having a longitudinal direction with a root end and a tip end as well as a chord extending in a transverse direction between a leading edge and a trailing edge is described. The blade comprises a flow control surface with a suction side and a pressure side. A number of boundary layer control means is formed in the flow control surface. The boundary layer control means include a channel submerged in the flow control surface with a first end facing towards the leading edge and a second end facing towards the trailing edge of the blade. The channel comprises: a bottom surface extending from the first end to the second end, a first sidewall extending between the flow control surface and the bottom surface and extending between the first end and the second end, the first sidewall forming a first sidewall edge between the first side wall and the flow control surface, and a second sidewall extending between the flow control surface and the bottom surface and extending between the first end and the second end, the second sidewall forming a second sidewall edge between the second side wall and the flow control surface. The channel at the first end comprises a first flow accelerating channel zone adapted for accelerating a flow, and at the second end comprises a second channel zone, where the first sidewall and the second sidewall are diverging towards the trailing edge of the blade. | 08-19-2010 |
| 20100201045 | EVACUATION PROCESS FOR USE IN A METHOD FOR PRODUCING A COMPOSITE STRUCTURE - The present invention relates to a method for producing a composite structure comprising fibre reinforced material by means of vacuum assisted resin transfer moulding, where fibre material is impregnated with liquid resin. The method comprises an evacuation process of a mould cavity by initially providing an under-pressure in a part of the mould cavity in order to provide a first vacuum front having a first pressure gradient oriented towards a first side of the forming structure, and a second vacuum front with a second pressure gradient oriented towards a second side of the forming structure, and controlling the first vacuum front and the second front to move towards the first side and the second side of the forming structure, respectively. | 08-12-2010 |
| 20100189973 | Method of Using a Formable Core Block for a Resin Impregnation Process - A use of a core block for an impregnation process as well as a composite structure comprising such a core block is described. The core block has a first surface and a second surface, and a number of first grooves is formed in the first surface of the core. Furthermore, a number of second grooves is formed in the second surface of the core. The first grooves have a first height (h | 07-29-2010 |
| 20100131216 | Power curve of wind power plant for energy network - The invention relates to a method of determining a desired power curve for a wind power plant for use in connection with the subsequent design and positioning of the wind power plant ( | 05-27-2010 |
| 20100121606 | Measuring of geometrical parameters for a wind turbine blade - This invention relates to methods for measuring geometrical parameters of a wind turbine blade, the method comprising placing a surveying instrument with a view to the root of the blade and measuring the blade. Methods are described for measuring parameters such as the blade length, the blade bending, the twist and the alpha-angle of the blade. This is accomplished by the use of a surveying instrument by which is measured a number of points or markings on the root of the blade, the blade tip and/or some reference markings on the blade. The invention further relates to the use of a surveying instrument for measuring and/or marking geometrical parameters on a wind turbine blade and for measuring deformations of a wind turbine blade. | 05-13-2010 |
| 20100115951 | Design of a group of wind power plants - The present invention relates to a group of wind power plants for positioning in approximately the same wind climate, comprising at least a first and at least a second wind power plant, where the first wind power plant exhibits maximised power output within a first interval of wind speeds, and the second wind power plant is designed to exhibit maximised power output within a second interval of wind speeds which is different from and starting from lower wind speeds than the first wind speed interval to the effect that the total power output of the group of wind power plants is increased at lower wind speeds. Moreover, the invention relates to a method of designing a group of wind power plants in accordance with the above. This can be accomplished eg by designing the supplementary wind power plant(s) with a larger rotor area and with a lower cut-out wind speed or, alternatively, by using a wind power plant without power-regulating means. Hereby it is accomplished that the power production of the group becomes more uniform and not so dependent on the current wind speed. The smaller power output from the supplementary wind power plants is completely or partially balanced by, on the one hand, the lower production and operating costs of the turbine and, on the other, the higher price on electricity. | 05-13-2010 |
| 20100092288 | Pitch of Blades on a Wind Power Plant - The present invention relates to a blade for a wind power plant with an assembly face for mounting in a circular pitch bearing, whose pitch axis is angled relative to the longitudinal axis of the blade, and wherein the blade comprises a root part with an approximately elliptic cross-section, in which root part the assembly face is arranged. The invention further relates to a wind power plant in general having a pitch-adjustable blade mounted in a pitch bearing such that the distance between the outermost part of the blade and the tower is increased when the leading edge of the blade is pitched up in the wind. This is accomplished in that the longitudinal axis of the blade is angled in a particular way compared to its pitch axis. The invention also relates to a meth controlling a wind power plant, including to increase the rotor area and/or increasing the distance between the outermost part of at least one blade and the tower by regulating, during operation, the pitch of a blade about a pitch axis which is angled relative to the longitudinal axis of the blade. | 04-15-2010 |
| 20100068058 | BLADE WITH HINGED BLADE TIP - The present invention relates to a blade ( | 03-18-2010 |
| 20100058904 | APPARATUS FOR CUTTING OFF FIBRE MATS - The present invention concerns a method and an apparatus for cutting fibre mats, preferably from a roll, where the cutting is effected with a mechanical automatic tool, where cutting of the fibre mat is effected so that the cut surface on the fibre mat can be varied from an angle greater than 0° to an angle less than 180° in relation to both surfaces on the fibre mat, where it is the variable position of the fibre mat relative to the direction of movement and cutting of the cutting tool that determines the angle of the cut. | 03-11-2010 |
| 20100014970 | WIND TURBINE BLADE WITH LIFT-REGULATING MEANS IN FORM OF SLOTS OR HOLES | 01-21-2010 |
| 20090252614 | Levelling of Root Bushings on Blades for Wind Turbines - The present invention relates to a method of manufacturing a blade for a wind turbine, wherein the blade is made in one or more moulds; and wherein the blade has integrally moulded root bushings in the root of the blade for direct or indirect attachment to a hub in a wind turbine. The novel aspect of the invention is that the root bushings ( | 10-08-2009 |
| 20090139739 | Lightning Protection System for a Wind Turbine Blade - The invention relates to a lightning protection system for a wind turbine blade, where the blade is a shell body made of a composite material and comprises a root area and a tip end. The lightning protection system comprises at least one lightning receptor arranged freely accessible in or on the shell unit surface on or in the immediate vicinity of the tip of the blade, and a lightning conductor made of electrically conductive material extending within the shell body along substantially the entire longitudinal direction of the blade. The lightning receptor and the lightning conductor are electrically connected by means of a connection area. The lightning conductor in its entire longitudinal direction as well as the connection area between the lightning conductor and the lightning receptor are electrically insulated in order to prevent lightning striking through the surface of the blade. | 06-04-2009 |
