Patent application number | Description | Published |
20080317583 | Offshore Wind Turbine with Device for Ice Prevention - Offshore wind turbine ( | 12-25-2008 |
20090104038 | Airfoil Family for a Blade of a Wind Turbine - A wind turbine rotor blade comprising a series of profiles is presented, which series of profiles comprises a number of profiles describing the outline of the blade transversally of its longitudinal axis, wherein some of the profiles of the series of profiles comprise approximately the same profile rear edge which describes at least a portion of the rear edge of the blade. The rear edge of the blade is configured in one piece and/or of a flexible material. Moreover a method of designing a series of profiles for a wind turbine rotor blade is presented. | 04-23-2009 |
20090129927 | Wind Power Plant with Lightning Protection Arrangement - A wind power plant ( | 05-21-2009 |
20090232656 | Blade for a wind Turbine Rotor | 09-17-2009 |
20090285691 | Blade for a Wind Turbine Rotor | 11-19-2009 |
20090295164 | Wind Turbine With Flow Surfaces - The present invention relates to a method of increasing the output of a wind turbine, wherein one or more flow surfaces are placed at a wind turbine. At lower wind speeds, the flow surfaces are set to guide the wind up towards and/or out from the rotor of the wind turbine and hence use the venturi effect in the rotor to advantage. At higher wind speeds, the flow surfaces are completely or partially taken out of the flow of the wind. Moreover, the flow surfaces can be adjusted around the wind turbine based on measurements of the speed of the wind and direction of the wind and/or the power signal of the wind turbine. | 12-03-2009 |
20100014970 | WIND TURBINE BLADE WITH LIFT-REGULATING MEANS IN FORM OF SLOTS OR HOLES | 01-21-2010 |
20100129229 | Attachment Devices on a Wind Turbine Blade and a Method of Servicing Utilising these Device - the present invention relates to a table for a wind turbine equipped with attachment devices | 05-27-2010 |
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 |
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 |
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 |
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 |
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 |
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 |
20120134825 | PITCH SYSTEM BALANCING - A balancing method and system for a partial pitch rotor blade for a wind turbine is described. Balancing elements are mounted to the pitch system of the rotor blade, which remove the need for complicated balancing operations to be performed which may affect the structural stability of the rotor blade body. A method is described wherein a suitable compensating balancing weight for mounting to the pitch system may be used, the weight chosen based on the known tip and root weights of standard blade extender and rotor blade parts used. | 05-31-2012 |
20120156051 | WIND TURBINE BLADE - A wind turbine blade is described wherein the blade comprises a hinged flap provided at the leading edge of the blade. The flap is arranged to hinge when the angle of attack of the incident airflow falls below a pre-defined angle, so that the aerodynamic profile of the blade is altered to reduce the magnitude of the negative lift coefficient of the blade. This reduces strain on the blade in such conditions, and associated fatigue loads on the blade and the wind turbine structure. The flap utilises simple biasing means, and does not require complicated sensor or actuation systems. | 06-21-2012 |
20120201689 | WIND TURBINE BLADE WITH LONGITUDINALLY EXTENDING FLOW GUIDING DEVICE HAVING A PLATE-SHAPED ELEMENT - A wind turbine blade ( | 08-09-2012 |
20120201690 | WIND TURBINE BLADE HAVING A FORWARDLY ORIENTED FLOW GUIDING DEVICE - 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 has a front surface facing toward an oncoming airflow and comprises at least a first portion, which is angled towards the oncoming airflow and a leading edge of the wind turbine blade. | 08-09-2012 |
20120243992 | WIND TURBINE BLADE - A partial pitch wind turbine blade in which the pitch system of the blade functions as a lightning receptor. As the pitch system is of a relatively large dimension, it is able to dissipate the effects of a lightning strike without damage, and removes the needs for additional blade features normally used to conduct lightning around or away from the pitch system. | 09-27-2012 |
20120257982 | BLADE FOR A WIND TURBINE ROTOR - Provided is a blade for a rotor of a wind turbine having a substantially horizontal rotor shaft, said rotor comprising a hub, from which the blade extends substantially radially when mounted, said blade having a chord plane extending between a leading edge and a trailing edge of said blade, a root area closest to the hub, an airfoil area furthest away from the hub, a transition area between the root area and the airfoil area, a first airfoil extending substantially along the entire airfoil area, and a second airfoil separately mounted to the blade, said second airfoil arranged at a mutual distance transverse to the chord plane and extending along the root area of the blades. | 10-11-2012 |
20120288371 | WIND TURBINE AND AN ASSOCIATED CONTROL METHOD - A partial pitch wind turbine and an associated control method are described wherein the wind turbine blade comprises an inner blade section designed as a stall-controlled blade and an outer blade section designed as a pitch-controlled blade. During operation of the wind turbine, the outer blade sections are pitched out of the wind to reduce the lift force generated in the outer blade sections, thereby reducing the blade root moments due to reduced moment arms. Meanwhile, the inner blade sections continually produce increasing power output for increasing wind speed, thereby allowing for nominal power output to be maintained while effectively de-rating the outer blade sections. | 11-15-2012 |
20120294723 | WIND TURBINE AND WIND TURBINE BLADE - A partial pitch wind turbine is described wherein the wind turbine blade has an inner blade section designed for stall-controlled operation and an outer blade section designed for pitch-controlled operation. The different blade profiles for the different sections allow for the efficient operation of the blade while providing for the control of the wind turbine to effectively reduce blade root moments. The outer blade sections can be pitched out of the wind to reduce root moments due to the outer blade sections, while the increasing power capture of the inner blade section maintains nominal power output. | 11-22-2012 |
20120321471 | WIND TURBINE BLADE - A wind turbine blade is described having a pitch system coupling which is adapted to allow fasteners, such as bolts, of such a coupling to be tightened from the inside of the blade. This removes the need for relatively difficult and expensive external maintenance operations to tighten pitch coupling bolts. The coupling is arranged to present first and second internal bearing surfaces, against which the bolts of the pitch coupling can be tightened. The coupling may comprise a shaped end portion of an inner blade section, and/or the pitch system may comprise an additional bolting collar to facilitate this arrangement. | 12-20-2012 |
20120321482 | WIND TURBINE BLADE - A blade for a partial pitch wind turbine is described, wherein the blade has a truncated aerodynamic profile provided at the pitch junction of the blade. The truncated trailing edge acts to prevent the formation of a trailing edge gap during pitching between the trailing edges of the inner and outer blade sections of a partial pitch blade, thereby reducing the negative impact of air leakage, etc., when pitching a partial pitch blade. | 12-20-2012 |
20130004312 | WIND TURBINE AND AN ASSOCIATED YAW CONTROL METHOD - A method of controlling the yawing of two-bladed wind turbine is described. The yaw speed of the turbine is increased when the wind turbine rotor blades are in a substantially vertical position, and the yaw speed may be reduced when the blades are substantially horizontal. By modulating the yaw rate based on the rotational angle of the blades, the effect of the yaw moments on the wind turbine structure is reduced, and the wind turbine may be designed to take into account such reduced forces. | 01-03-2013 |
20130028734 | MAGNETIC ACTIVE FLAP - The present invention relates to a wind turbine blade for a rotor of a wind turbine having a substantially horizontal rotor shaft and a hub connected to the rotor shaft, the blade extending in a substantially radial direction from the hub, when mounted to the hub, wherein the blade comprises: a profiled contour comprising a pressure side and a suction side and a leading edge and a trailing edge connecting the pressure side and the suction side, a lift regulating device, and an operation device comprising an electromagnet configured to operate the lift regulating device between a first state and a second state. The lift regulating device comprises a magnetisable material. | 01-31-2013 |
20130272891 | BLADE FOR A WIND TURBINE ROTOR - Provided is a blade for a rotor of a wind turbine having a substantially horizontal rotor shaft, said rotor comprising a hub, from which the blade extends substantially radially when mounted, said blade having a chord plane extending between a leading edge and a trailing edge of said blade, a root area closest to the hub, an airfoil area furthest away from the hub, a transition area between the root area and the airfoil area, a first airfoil extending substantially along the entire airfoil area, and a second airfoil separately mounted to the blade, said second airfoil arranged at a mutual distance transverse to the chord plane and extending along the root area of the blades. | 10-17-2013 |
20130323070 | TRAILING EDGE TAPE - A wind turbine rotor blade for a wind turbine having a length extending from a first end, a leading edge and a trailing edge, where a pressure side and a suction side extend between the leading edge and the trailing edge and thus define an airfoil shaped cross section. At least along a part of the length of the wind turbine rotor blade, the trailing edge comprises a trailing edge part having a first and a second installation flange, each of which has a width. The installation flanges are arranged in connection with a trailing edge extender, the first and second installation flanges both having an inner surface for installation on the pressure side and the suction side of the wind turbine blade. Also, method for fitting a wind turbine rotor blade with a trailing edge part is provided. | 12-05-2013 |
20140017079 | METHOD AND SYSTEM TO ACTIVELY PITCH TO REDUCE EXTREME LOADS ON WIND TURBINE - The present invention relates to a method of controlling an idling wind turbine in which wind condition data and wind turbine position data are collected by a sensor system, a control system computes an optimal pitch angle for a rotor blade of the wind turbine, and a pitching system continuously turns the rotor blades in the same direction in multiples of 360 degrees. The present invention further relates to a wind turbine with a sensor system including a wind sensor that measures wind condition data in the vicinity of the wind turbine, and a control system including a computer that executes a control algorithm and processes sensor input from the sensor system to compute an optimal pitch angle value for a rotor blade on the hub. This allows pitching the rotor blade into angle in which the mechanical loads of that rotor blade are reduced to a minimum when idling. | 01-16-2014 |