With Means Positioning Fluid Current Driven Impeller Relative To Flow Direction Patents (Class 416/9)
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Publication number: 20120251316Abstract: A system and method are provided to increase efficiency of turbines in wind farms. A sensor is configured to detect direction and speed of an inflow of wind. A controller is configured to generate a control signal based the detected direction and speed of the inflow of wind. A pitch adjustment device configured to adjust pitch of a blade of the turbine based on the control signal.Type: ApplicationFiled: June 18, 2012Publication date: October 4, 2012Applicant: CATCH THE WIND, INC.Inventors: Philip L. ROGERS, Frederick C. BELEN, JR., Elizabeth A. DAKIN, Priyavadan MAMIDIPUDI
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Patent number: 8277184Abstract: A wind energy system is provided with said wind energy system including a hub pivotable about a rotation axis, a first bearing connected to said hub, a tapered adapter, a second bearing connected to said first bearing by said adapter, wherein said first and second bearings and said adapter are arranged such that the tilt angle of said rotation axis of said hub is adjustable. Further, a tilt adjustment system for a wind energy system and a method for operating a wind energy system is provided.Type: GrantFiled: April 22, 2010Date of Patent: October 2, 2012Assignee: General Electric CompanyInventors: Jacob Johannes Nies, Shanmuga-Priyan Subramanian
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Publication number: 20120243991Abstract: Infinitely variable motion control (IVMC) provides motion control without any requirement for changing gears or use of a clutch. A spur gear transgear, defined as a system having an input, an output and a control, a variable pitch cam having an eccentric inner and outer cam assembly, a driver and a one-way clutch or ratchet bearing assembly may be used to form a cam controlled speed converter converting a given input to a variable or constant output speeds and further having direction control. All IVMC's, cam controlled IVMC, input compensated IVMC and pitch controlled IVMC may be utilized to form various embodiments of infinitely variable generators, transmissions and compressors/pumps.Type: ApplicationFiled: March 21, 2012Publication date: September 27, 2012Inventor: Kyung Soo Han
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Publication number: 20120243990Abstract: A vertical axis wind turbine is disclosed which includes an upstanding tower. A plurality of radially spaced-apart airfoil supports are rotatably mounted on the tower which extend outwardly therefrom. A generally vertically disposed airfoil blade is pivotally secured, about a vertical axis, to the outer end of each of the airfoil supports. A wind vane is secured to each of the airfoil blades which causes pivotal movement of the associated airfoil blade relative to the associated airfoil support in response to wind direction. A mechanism interconnects each of the airfoil blades to the associated wind vane which causes pivotal displacement of the airfoil blade with respect to the associated wind vane and wind flow with the pivotal displacement being of a magnitude and direction to cause a forward thrust to the airfoil blade from wind acting on the airfoil blade.Type: ApplicationFiled: March 21, 2011Publication date: September 27, 2012Inventor: Alois J. Kosch
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Publication number: 20120224963Abstract: A grease collector is described, which is connectable to a wind turbine nacelle. The grease collector includes a channel with a flexible side portion for providing a sealing between the nacelle and a wind turbine tower. Moreover, a wind turbine nacelle and a wind turbine with a grease collector and a method for collecting excess grease which is emitted from a yaw system of a wind turbine are provided.Type: ApplicationFiled: August 20, 2010Publication date: September 6, 2012Applicant: Siemens AktiengesellschaftInventor: Thorkil Munk-Hansen
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Patent number: 8257019Abstract: A wind energy systems includes a shroud for each turbine. The shroud is adapted to direct and accelerate wind towards the turbine. A strong adaptable support assembly is provided for securing turbines to a structure. An air glide yaw assembly facilitates rotational movement of the structure allowing the turbines to face oncoming wind. The turbine blades are optimized for use with a shroud.Type: GrantFiled: August 27, 2007Date of Patent: September 4, 2012Assignee: Green Energy Technologies, LLCInventors: Mark L. Cironi, John W. Fedor
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Patent number: 8251662Abstract: In one aspect, a wind turbine blade assembly includes a central shaft defining an axis of rotation and a plurality of helically twisted blades supported on the central shaft. The helically twisted blades have an inner edge and an outer edge, and at least a portion of the helically twisted blades is radially spaced apart from the central shaft. In another aspect, a wind turbine apparatus employing the wind turbine blade assembly is provided.Type: GrantFiled: January 22, 2008Date of Patent: August 28, 2012Inventor: Daniel B. Parker
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Publication number: 20120207601Abstract: A rotor for a generating system includes a drive shaft, a plurality of support frames mounted on the drive shaft to rotate the drive shaft, and a plurality of blades each pivotally mounted on a respective one of the support frames. When the power touches the blades, the blades are pushed to pivot such that some of the blades are moved to abut the drive shaft and some of the blades are moved to be parallel with the travel direction of the power. Thus, the blades that are moved to abut the drive shaft will be pushed by the power to rotate the drive shaft, while the blades that are moved to be parallel with the power will not produce a drag or resistance to the power.Type: ApplicationFiled: February 11, 2011Publication date: August 16, 2012Inventor: Yu-Han Wang
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Patent number: 8242618Abstract: A wind turbine generator is provided in which a gear having a large diameter is not required in a yaw drive device (30) of a yaw system (10A). The yaw drive device (30) of the yaw system (10A), which revolves a nacelle (3) depending on the wind direction, includes a electric motor (31) which is fixedly provided on a nacelle base plate (12), with an output shaft (31a) substantially aligned with a pivot of the nacelle (3). The output shaft (31a) and a fixed-side support member (2b) provided in the vicinity of an upper end of the tower (2) are coupled by a coupling shaft (33) having couplings (32) provided at both ends thereof.Type: GrantFiled: June 11, 2008Date of Patent: August 14, 2012Assignee: Mitsubishi Heavy Industries, Ltd.Inventor: Tomohiro Numajiri
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Publication number: 20120201675Abstract: A two-bladed partial-pitch wind turbine and a method of controlling such a wind turbine during high wind conditions are described. The turbine is operable to pitch the outer sections of the turbine rotor blades during extreme wind conditions (i.e. high wind loads) such that the outer blade sections are substantially orthogonal to the inner blade sections. This arrangement acts to reduce the extreme thrust loading experienced by the wind turbine structure during severe gusts (e.g. during hurricane or typhoon conditions), and accordingly reduces the risk of damage to the wind turbine in such conditions.Type: ApplicationFiled: February 2, 2012Publication date: August 9, 2012Applicant: Envision Energy (Denmark) ApSInventor: Michael FRIEDRICH
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Publication number: 20120201677Abstract: A more efficient and simple wind turbine generator with a lifting device and method of using the lifting device is disclosed. A wind turbine generator comprises a tower, a nacelle supported by the tower, the nacelle comprising a foundation supporting components of the nacelle, a yawing system comprising a yaw bearing enabling rotation of the nacelle relative to the tower, a lifting device internally in the wind turbine generator and capable of moving an item, a support supporting the lifting device, and wherein the lifting device is moveable in a horizontal direction from a first position to a second position, and at least one of the positions is, in a vertical direction, between a lowermost level of the foundation, such as just above the yaw bearing, and an uppermost level of the tower, such as just below the yaw bearing.Type: ApplicationFiled: December 12, 2011Publication date: August 9, 2012Applicant: VESTAS WIND SYSTEMS A/SInventors: Venkatesh Krishnan, Henning Mortensen
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Publication number: 20120189444Abstract: The invention relates to a wind turbine blade comprising one or more turbulence generating strips, where the strips are placed on a surface of the blade. The blade is characterized in that at least one joint area of the turbulence generating strips and the surface of the blade are completely or partially covered by sealing means. The invention further relates to a pitch controlled wind turbine comprising at least two pitch controlled wind turbine blades and pitch controlling means for pitching the blades. The pitch controlled wind turbine is characterized in that the blades comprises one or more turbulence generating strips, wherein at least one joint area of the turbulence generating strips and a surface of the blades are completely or partially covered by sealing means.Type: ApplicationFiled: April 3, 2012Publication date: July 26, 2012Applicant: VESTAS WIND SYSTEMS A/SInventor: Michael Drachmann Haag
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Publication number: 20120189445Abstract: The present disclosure relates to a rotor for a wind turbine (1), having a rotor hub (8), having at least one rotor blade (9) mounted on the rotor hub (8) so as to be rotatable about a blade axis (11). At least one threaded spindle mechanism (13) is positioned between the rotor hub (8) and the rotor blade (9) and is connected both to the rotor hub (8) and the rotor blade (9). The rotor blade (9) is adapted to be rotated relative to the rotor hub (8) about the blade axis (11) by means of an actuation of the threaded spindle mechanism (13). The threaded spindle mechanism (13) has a drive (22), an actuating element (31), a spindle nut (18) detachably coupled to the actuating element (31), and a threaded spindle (19) which can be rotated about the longitudinal axis (25) thereof by means of the drive (22) and which is detachably coupled to the drive (22), such that the threaded spindle (19) and the spindle nut (18) can be separated from the threaded spindle mechanism (13).Type: ApplicationFiled: October 3, 2010Publication date: July 26, 2012Applicant: SSB Wind Systems GmbH & Co. KGInventor: Fabio Bertolotti
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Publication number: 20120177492Abstract: Disclosed is a wind turbine having a nacelle (20), a rotor (1) that is mounted on the nacelle (20) so as to be rotatable about a rotor axis (12). The rotor (1) includes a rotor hub (2) and multiple rotor blades (3, 4, 5), each of which extends in the direction of a blade axis (13, 14, 15) running transversely or substantially transversely to the rotor axis (12) and is mounted on the rotor hub (2) so as to be rotatable about the respective blade axis (13, 14, 15). The rotor (1) further includes at least one switchgear cubicle (9, 10, 11) per rotor blade (3, 4, 5). An electric circuit (23, 24, 25) for actuating at least one blade angle adjustment drive (26, 27, 28), by means of which the respective rotor blade (3, 4, 5) can be rotated about the blade axis (13, 14, 15) thereof, is arranged in said at least one switchgear cabinets (9, 10, 11). The switchgear cabinets (9, 10, 11) are combined to form a compact switchgear cabinet assembly (22) which sits radially centered within the rotor hub (2).Type: ApplicationFiled: September 12, 2010Publication date: July 12, 2012Applicant: SSB Wind Systems GmbH & Co. KGInventors: Ulrich Schomakers, Hendrik Wensing
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Publication number: 20120171034Abstract: The invention allows orientation of the platform (1) in order to obtain conditions of maximum efficiency in the wind turbine (16). It comprises first sensors (8) for detecting an effective rotation axis angle (?) formed between the rotation axis (2) and a horizontal plane (24); second sensors (9) for detecting wind direction (23); platform orientation means (11) for modifying the effective rotation axis angle (?); and at least one control unit (12) adapted for receiving a first input (13) from the first sensors (8) and a second input (14) from the second sensors (9) and, based on said inputs (13, 14), transmitting orders to the platform orientation means (11) and yaw mechanism.Type: ApplicationFiled: December 29, 2011Publication date: July 5, 2012Applicant: Acciona Windpower, S.A.Inventors: Teresa Arlabán Gabeiras, José Miguel García Sayés, Miguel Núñez Polo
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Publication number: 20120153631Abstract: Biasing unit, a spindle member, and a link mechanism of a windmill for a wind power generator vary an angle of a blade in a first stage where the angle is made nearly parallel to the wind so that the blade easily rotates in light winds, a second stage where the angle is made nearly perpendicular to the wind so that the blade easily rotates at high speed when the wind speed increases, and a third stage where the blade is pushed back from the state of being nearly perpendicular to the wind to the state of being nearly parallel to the wind so as to prevent the excessive rotation in strong winds, without electrical control being not required. Accordingly this wind power generator has an excellent starting performance and can control the excessive rotation at low cost.Type: ApplicationFiled: November 9, 2010Publication date: June 21, 2012Applicant: Birumen Kagoshima Co., Ltd.Inventors: Kazuki Nomoto, Kazuomi Nomoto, Manabu Yagi
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Publication number: 20120156032Abstract: A system comprises a main shaft configured to rotate about a main shaft axis, the main shaft comprising a hub. A first axle couples to the hub and rotates about a first axle axis in a first range of motion. A first wing couples to the first axle wherein the first range of motion orients the first wing within a range of attitudes bounded by and including a first attitude and a second attitude. The first attitude presents a first cross sectional surface area relative to a predetermined fluid flow direction and the second attitude presents a second cross sectional surface area relative to the predetermined fluid flow direction. The first cross sectional surface area is larger than the second cross sectional surface area. A second axle couples to the hub and rotates about a second axle axis in a second range of motion. The second axle axis is parallel to first axle axis and a second wing couples to the second axle.Type: ApplicationFiled: July 23, 2010Publication date: June 21, 2012Applicant: Just the 4 of US, LLCInventors: Gary L. Durham, H. Stephen Durham
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Patent number: 8186949Abstract: A method in connection with a wind turbine installation for damping tower vibrations, in particular a floating wind turbine installation comprising a floating cell, a tower arranged over the floating cell, a generator mounted on the tower that is rotatable in relation to the wind direction and fitted with a wind turbine, and an anchor line arrangement connected to anchors or foundations on the sea bed. The tower's eigenvibrations, ?eig, are damped by, in addition to control with the controller in the constant power or RPM range of the wind turbine, an increment, ??, being added to the blade angle of the turbine blades on the basis of the tower velocities, ?Z, so that the eigenvibrations are counteracted.Type: GrantFiled: October 30, 2006Date of Patent: May 29, 2012Assignee: StatoilHydro ASAInventors: Finn Gunnar Nielsen, Bjorn Skaare, John Olav G. Tande, Ian Norheim, Kjetil Uhlen
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Patent number: 8147195Abstract: A water current generating device is provided that consists of a main body and a horizontal axis rotor attached by a mechanical connection to a fixed support structure. Under the action of one or more hydrodynamic thrusters, the main body of the turbine is rotated about a desired axis of rotation to face the oncoming current flow. The mechanical connection incorporates an appropriate degree of freedom to allow this re-orientation to take place.Type: GrantFiled: September 7, 2007Date of Patent: April 3, 2012Assignee: Tidal Generation LimitedInventor: Paul Vigars
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Publication number: 20120045332Abstract: A turbine head comprising: a rotatable member; a plurality of laminar blades each including a surface, the blades being rotatably mounted to the rotatable member such that the blades can each rotate relative to the rotatable member from a first position to a second position, the angle between the first and second positions being less than 180 degrees; wherein each blade is rotatably mounted to the rotatable member about an axis that is near the centre of the blade such that, if a force is applied to the blade in a direction that is perpendicular to the surface, the difference in force between the force exerted on a portion of the surface on one side of the axis and the force exerted on a portion of the surface extending to the other side of the axis is sufficient to cause the blade to rotate from the first position towards the second position.Type: ApplicationFiled: March 9, 2010Publication date: February 23, 2012Applicant: WINDJOULE LTDInventor: Robert Fraser Morris
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Patent number: 8109722Abstract: A turbine for use with a turbine generator, the turbine including at least one turbine blade for positioning in a flowpath, a hub mounting the at least one turbine blade, and a rotatable shaft in operational communication with the hub via a hinge assembly, an axis of the hub being independent of an axis of the shaft. The hinge assembly is disposed between the shaft and the hub and configured to adjust an angle therebetween. A controller assembly is configured to adjust at least one operational characteristic of the hinge assembly during turbine operation. In one embodiment the operational characteristic is a teeter angle of the hinge assembly. In one embodiment operational characteristic is a stiffness or damping force. Methods for using and controlling a fluid turbine are also disclosed.Type: GrantFiled: March 24, 2009Date of Patent: February 7, 2012Assignee: Nordic Windpower Ltd.Inventors: Charles R. Gamble, Steve Taber
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Patent number: 8106528Abstract: A horizontal axis wind turbine with rotatable tower including nacelle and blades. The tower, the blades, and the nacelle are rotatable by following the shift of wind direction so as to align the blades to be facing with the wind direction for enhancing performances thereof. Also can eliminate the gearbox, as compared to the conventional horizontal axis wind turbine that the nacelle is not completely fixed with tower, the present invention is easy to manufacture with reduced costs.Type: GrantFiled: July 8, 2009Date of Patent: January 31, 2012Assignee: Houly Co., Ltd.Inventor: Kuo-Shen Liu
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Publication number: 20120020788Abstract: Wind energy systems comprise a wind accelerator having a support assembly and an outer structure surrounding the support assembly. The wind accelerator has a front region and a rear region. The rear region is substantially wider than the front region, and the outer structure tapers from the rear region to the front region. One or more turbines are mounted on the support assembly at or near the rear region of the wind accelerator or at or near the widest point of the wind accelerator.Type: ApplicationFiled: September 29, 2011Publication date: January 26, 2012Applicant: The Green Electric Company, A Massachusetts CorporationInventor: Dan Lucy
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Publication number: 20120009063Abstract: Provided is a wind turbine generator in which, the specifications of the gears can be designed for the level of a maximum load during driving without decreasing the necessary strength and durability. A wind turbine generator in which a nacelle is installed at an upper end of a tower that is vertically erected on a foundation includes a yaw driving unit that yaws the nacelle and/or a pitch driving unit that controls pitch angles of the wind turbine blades, wherein a drive mechanism of the yaw driving unit and/or the pitch driving unit, which are equipped with an engaging portion of a slewing bearing (20) having internal teeth or external teeth and a pinion gear is equipped with a clutch mechanism, at the engaging portion, that slides when receiving an input larger than a maximum load during driving.Type: ApplicationFiled: August 26, 2011Publication date: January 12, 2012Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Yoshitomo NODA, Seita SEKI, Akihiko YANO
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Publication number: 20110318178Abstract: A wind turbine yaw system is provided that includes a yaw gear, at least two pinion gears, and at least two drive units, each of which is associated to one of the pinion gears for driving that pinion gear. The yaw system also includes a control system with a controller for generating a drive unit control signal for each drive unit for controlling the respective drive unit according to a reference signal having a desired operational parameter value for the respective drive unit, so as to realize the desired operational parameter value in the respective drive unit. The control system includes a feedback loop for each drive unit feeding a drive unit feedback signal including at least the actual value of one operational parameter of the respective drive unit back to the controller. The controller generates the drive unit control signals based on the reference signal and the feedback signals.Type: ApplicationFiled: June 22, 2011Publication date: December 29, 2011Inventor: Kurt Andersen
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Publication number: 20110299986Abstract: The object of the invention is to provide a control apparatus C of a horizontal axis wind turbine apparatus WTG that calculates the value en of a pitch angle command for each blade based on the rate of change ?D of the azimuth angle ? of a Nacelle N and the rotor azimuth angle ? of the blades B1, B2 and B3, causes the rotor to generate torque around the yaw axis by periodically controlling the angle change of the pitch angle of the blades, and using that torque, controls the rate of change of the azimuth angle of the nacelle. The value of that angle change is calculated as a value that increases as the inputted value of the rate of change ?D increases.Type: ApplicationFiled: June 3, 2011Publication date: December 8, 2011Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventor: Shigeo Yoshida
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Patent number: 8061963Abstract: A wind turbine system includes a kite positioned upstream to a turbine to direct wind to the turbine, thereby increasing revolutions per minutes and power output of the turbine.Type: GrantFiled: June 15, 2009Date of Patent: November 22, 2011Inventor: Franklin F K Chen
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Publication number: 20110268568Abstract: The present disclosure relates to a hydraulic pressure system for providing fluid pressure to actuate at least one hydraulic yaw motor for adjusting the yaw of a nacelle of a wind energy system independently of electrical power. The hydraulic pressure system includes a connection portion connectable to a main drive train of the wind energy system, the main drive train transmitting kinetic energy generated by wind energy. The hydraulic pressure system is adapted to be driven by the kinetic energy of the main drive train via the connection portion to provide the fluid pressure. The present disclosure further relates to a hydraulic yaw adjustment system for adjusting the yaw of a nacelle of a wind energy system independently of electrical power, the hydraulic yaw adjustment system including the hydraulic pressure system.Type: ApplicationFiled: June 29, 2010Publication date: November 3, 2011Inventor: Hartmut SCHOLTE-WASSINK
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Patent number: 8043055Abstract: A wind turbine generator system is provided with a nacelle supporting a wind turbine rotor, a nacelle rotation mechanism, an anemometer, and a control apparatus controlling the nacelle rotation mechanism. Said control apparatus calculates the wind direction deviation from the wind direction measured by the anemometer and the direction of the wind turbine rotor. Said control apparatus performs a yaw rotation of the nacelle by the nacelle rotation mechanism when any of conditions (1) and (2) is satisfied; the condition (1) is a condition under which a state where the absolute value of said wind direction deviation is equal to or more than a first threshold value continues for a first duration predetermined, and the condition (2) is a condition under which a state where the absolute value of said wind direction deviation is equal to or more than a second threshold value larger than said first threshold value continues for a second duration shorter than said first duration.Type: GrantFiled: March 24, 2008Date of Patent: October 25, 2011Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Atsushi Matsuo, Koji Fukami, Toshihide Noguchi, Kazuki Hayashida, Teppei Fujitsuka, Yuji Yatomi
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Patent number: 8021101Abstract: A method of assembling a wind turbine is provided. The method includes coupling a support flange to an inner surface of a tower, and positioning a yaw bearing on the support flange. The yaw bearing includes a plurality of horizontally oriented rollers. A base of a nacelle assembly is positioned on the yaw bearing such that the base is rotatable with respect to the tower.Type: GrantFiled: December 15, 2008Date of Patent: September 20, 2011Assignee: General Electric CompanyInventors: Eugenio Yegro Segovia, Pedro Luis Benito Santiago
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Publication number: 20110211956Abstract: A parallel-connected matrix integrated wind power generation system, which includes: a plurality of Savonius wind turbines and a plurality of phase angle positioning components among wind turbines and a plurality of distance positioning components among wind turbines; meanwhile, the phase angle positioning components among wind turbines also have the function to transfer the mechanical energy of wind turbine, and the plurality of Savonius wind turbines are arranged in parallel way; the distance positioning components among wind turbines are connected to those plurality of Savonius wind turbines so that fixed distances are maintained among the plurality of Savonius wind turbines; moreover, the phase angle positioning components among wind turbines are connected to the plurality of Savonius wind turbines so that fixed phase angle differences are maintained among the plurality of Savonius wind turbines; furthermore, Savonius wind turbine of this system is further installed with flow-guiding plate, and the structType: ApplicationFiled: February 23, 2011Publication date: September 1, 2011Inventor: Chin-Lien TSENG
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Publication number: 20110211955Abstract: A wind turbine having a nacelle being rotatably disposed on a tower is proposed. The nacelle has a first cavity, a generator housing portion disposed upstream to the nacelle having a second cavity, a hub disposed upstream to the generator housing portion with attached rotor blades at it having a third cavity. The first, second and third cavities communicates with one another. A rail-system has at least one rail-element having a device for lifting and/or transporting. The device for lifting and/or transporting is movable along the rail-system. The rail-system at least partially extends through at least two adjacent cavities.Type: ApplicationFiled: February 22, 2011Publication date: September 1, 2011Inventors: Uffe Eriksen, Thorkil Munk-Hansen
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Patent number: 8002516Abstract: A wind harnessing system comprises a substantially helical structure including at least a portion of a spiraling groove and at least one energy converter positioned at least partially within the portion of the spiraling groove. In other embodiments, wind grooves formed by adjacent bands which are fixed with respect to one another, carry energy converters which are moveable with respect to these fixed bands.Type: GrantFiled: April 7, 2009Date of Patent: August 23, 2011Assignee: Cleveland State UniversityInventor: Majid Rashidi
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Publication number: 20110198857Abstract: A wind turbine captures energy from a flowing fluid medium using drum-shaped drive elements that spin while traveling along a continuous orbiting course around a base. Attached roller bearings engaging stationary raceways can guide the drive elements. Means for spinning the drive elements can include toothed belts engaging drive element cog wheels. Spinning can provide Magnus effect enhancement. Wind energy is captured by the drive element motion, then transferred to the base cog wheels by a toothed belt and finally fed to an output shaft. The invention includes locating drive elements in a moving fluid medium, spinning the drive elements as they are urged by the wind along a continuous orbiting course and capturing energy by linking the motion of the drive elements to an external device. The method includes adjusting the base's azimuth and the angle of incidence of the wind in response to wind direction and speed.Type: ApplicationFiled: February 14, 2011Publication date: August 18, 2011Inventor: Erwin Martin Becker
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Publication number: 20110171022Abstract: A wind turbine comprising a tower and a nacelle which is rotatably mounted on the tower and whose alignment is adjustable by means of a yaw system, wherein the yaw system has at least one adjusting drive, a rotatable yaw bearing, at least one brake disk and at least two brake units which can exert a braking torque on the brake disk, wherein the at least one of the brake units has a first brake pad with a first coefficient of friction, and at least one of the brake units has a second brake pad with a second coefficient of friction, wherein the first and the second coefficient of friction are different from each other.Type: ApplicationFiled: September 24, 2010Publication date: July 14, 2011Applicant: Nordex Energy GmbHInventors: Merten Behnke, André Sievers
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Publication number: 20110171026Abstract: A gear assembly is disclosed. The gear assemble includes a ring gear and at least one pinion gear. The ring gear includes a surface which is coated with an abrasion resistant coating and the surface of the at least one pinion gear has a lower hardness than the surface of the ring gear.Type: ApplicationFiled: January 14, 2011Publication date: July 14, 2011Inventors: Helmut KÖLPIN, Matthias WOHLLEB
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Patent number: 7976267Abstract: A helical turbine with a circular member attached to one end for redirecting axially flowing fluid into perpendicularly flowing fluid. A fluid diverter for redirecting substantially perpendicular flowing fluid into axially flowing fluid. A hollow circular member attached to an opposite end of the turbine allowing substantially axial flowing fluid into one end of turbine. A drive shaft of at least one generator is in continuous contact with the peripheral edge of the solid or hollow circular member producing faster rpm. A turbine assembly mounted on a rooftop utilizing accelerated wind. Fluid diverters increasing fluid flow into the helical turbine's receding blades. A fluid diverter preventing fluid from hitting turbine's oncoming blades. A tail section for maintaining optimal direction into oncoming fluid. Two counter rotating turbines where the attached circular member's edges are in continuous contact.Type: GrantFiled: August 10, 2010Date of Patent: July 12, 2011Inventor: James W. Burrell, IV
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Publication number: 20110142626Abstract: A wind turbine yaw brake apparatus includes a circular rotation support base having an inner and an outer cylinder wall. The circular rotation support base is mounted to a top face of a wind turbine tower and a nacelle such that the nacelle can rotate relative to the wind turbine tower. A plurality of brake lining elements are removably mounted to the circular rotation support base. A disc brake unit acts upon the brake aligning elements.Type: ApplicationFiled: August 26, 2009Publication date: June 16, 2011Inventors: Jesse M. Hanson, Ehren W. Van Schmus, Carl G. Wood, Brad D. Banwarth
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Publication number: 20110070083Abstract: A wind turbine body and a wind turbine are disclosed. The wind turbine body has a curved body and a plurality of blades. The curved body includes a front portion, a rear portion, and a middle portion between the front portion and the rear portion. The curved body is configured such that at least the middle portion rotates about an axis of rotation. A diameter of the curved body gradually increases from the front portion to the middle portion, and gradually decreases from the middle portion to the rear portion. The blades are attached to and around the middle portion about the axis of rotation. The blades are configured to convert an airflow into rotational motion of the middle portion. The wind turbine includes a wind turbine body and a fin at the rear portion. The fin is configured to steer the wind turbine about a steering axis so that the front portion faces the airflow.Type: ApplicationFiled: September 17, 2010Publication date: March 24, 2011Inventor: Salomo Murtonen
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Publication number: 20110044811Abstract: A method of wind turbine control includes determining wind tangential velocity, averaged over a rotor swept plane, from an instantaneous measurement of a rotor azimuth angle and a rotor teeter angle.Type: ApplicationFiled: August 20, 2009Publication date: February 24, 2011Inventor: Fabio P. Bertolotti
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Publication number: 20110044815Abstract: A stream energy extraction device including endless ropes running around sheaves, there being connected, along at least one rope, submerged sail- or vane-like elements. Flowing water causes the sail- or vane-like elements to be moved through the water, whereby at least a portion of the stream energy of the water is transmitted to the rope. A channel encloses at least a portion of the rope that is traveling in an upstream direction.Type: ApplicationFiled: February 11, 2009Publication date: February 24, 2011Inventor: Are Borgesen
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Publication number: 20110033293Abstract: The disclosure provides a retractable wind turbine apparatus for generating power. When required, the mast and blades of the retractable wind turbine apparatus are designed to retract and become non-visible to an observer. The retractable wind turbine apparatus will enable power generation in locations where aesthetic issues are of a concern. Power generation may be stopped during designated periods such as tourist season or daylight hours. In these situations, the wind turbine apparatus will be retracted and hidden from view.Type: ApplicationFiled: August 10, 2009Publication date: February 10, 2011Inventor: Lincoln Joseph Cavalieri
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Patent number: 7883318Abstract: Apparatus for harvesting power from the wind, mounted on a vertical support or pole, has two linear “power harvesting devices” arranged in V-shaped configuration with the apex of the “V” mounted for rotation in a horizontal plane about the vertical support. The two power harvesting devices move under the influence of incoming wind to orient themselves such that the apex of its “V”-shape structure always faces the incoming wind. The power harvesting devices are each provided with blades attached for movement with a linear endless drive conveyor. With the apex of the “V” facing the wind, the blades are oriented to intercept this wind and to cause movement of the conveyor drive to which they are attached.Type: GrantFiled: August 15, 2007Date of Patent: February 8, 2011Inventor: Joseph Voves
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Patent number: 7855882Abstract: The described embodiments relate to fan units. One exemplary fan unit includes a housing supporting a motor. The fan unit also includes an impeller coupled to the motor and configured to be rotated by the motor. The impeller comprises at least a first structure configured to move air past the housing and at least one second different structure configured to force air into the housing.Type: GrantFiled: December 24, 2008Date of Patent: December 21, 2010Assignee: Hewlett-Packard Development Company, L.P.Inventor: John P. Franz
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Publication number: 20100226772Abstract: A wind turbine system for blade control which employs means for adjusting the pitch and yaw of the blades rotating about an axis and the resulting speed of the blades powering a wind turbine. The control system selectively resists movement of said blades to a different incline position based on a comparison of the measured rotational speed with a target speed value, the target speed value being determined based on an energy output level for said turbine. The control system includes at least one adjustable hydraulic actuator for movement of said blades to a different incline position.Type: ApplicationFiled: March 5, 2010Publication date: September 9, 2010Inventor: Kenneth James Deering
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Publication number: 20100221109Abstract: A wind turbine apparatus includes a unit structure that is coupled to a central hub by way of an in-tension cable. The unit structure includes a first set of struts, wherein each strut in the first set of struts includes first and second ends, the first ends of the first set of struts are coupled to a first node and the first set of struts extend from the first node towards the central hub. The unit structure also includes a second set of struts, wherein each strut in the second set of struts includes first and second ends, the first ends of the second set of struts are coupled to the first node and the second set of struts extend from the first node away from the central hub.Type: ApplicationFiled: September 14, 2007Publication date: September 2, 2010Inventor: Theodore Radisek
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Patent number: 7753644Abstract: A vertical axis multi-phased wind turbine power generating system is disclosed. An adjustable air scoop directs air from a first phase of the prevailing wind into an air turbine for efficient power generation. An exit section, which uses a second phase of the prevailing wind in combination with an optional and adjustable exit section drag curtain or barrier, provides for efficient re-entrainment of this first stage of power generating air back into the downstream prevailing wind. The adjustable air scoop and adjustable exit drag curtain or barrier, where utilized, is automatically rotated in a self correcting manner to be suitably and optimally oriented to the prevailing wind direction. The design provides for a second stage of power generation to be accomplished by additionally utilizing a portion of the second phase of prevailing wind to directly or indirectly drive the turbine in a second stage of power production.Type: GrantFiled: January 16, 2009Date of Patent: July 13, 2010Inventor: Brett C. Krippene
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Patent number: 7744345Abstract: A vertical axis wind turbine provides a rotor assembly which rotates on bearing assemblies affixed to a rotor shaft supported by a base, the rotor assembly having vertical blades mounted between top and bottom plates, and power takeoff means to provide power by direct mechanical linkage or to drive an electrical generator. The rotor assembly is partially enclosed by a housing. Attached to the side of the housing is a wind vane. Attached to the bottom side of the housing are rollers. The wind vane, in combination with the rollers, act to rotate the housing to a position that will permit the wind to act upon the exposed vertical blades.Type: GrantFiled: June 18, 2007Date of Patent: June 29, 2010Inventor: Victor E. Pohribnak
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Publication number: 20100135797Abstract: A wind turbine includes a tower member a yaw system, and a wind energy collection system. The wind energy collection system includes a central hub and a plurality of blade members. The wind turbine further includes a component manipulating system operatively coupled between at least one of the plurality of blade members and the tower member. The component manipulating system includes a blade member support structure including a first end pivotally connected relative to the tower member that extends to a second end operatively coupled to the one of the plurality of blade members, and a winching system operatively connected to the one of the plurality of blade members and the tower member. The winching system is selectively operated to shift the one of the plurality of blade members relative to the tower member in order to enable serving of the wind turbine.Type: ApplicationFiled: October 6, 2009Publication date: June 3, 2010Applicant: GENERAL ELECTRIC COMPANYInventor: Jacob Johannes Nies
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Publication number: 20100092290Abstract: A device to convert the kinetic energy of wind into kinetic energy in the form of a rotating mass (FIG. 9) and to then selectively harvest and convert the kinetic energy of the rotating mass into electrical energy using both permanent magnet and electromagnet generators (FIG. 33). The conversion of the kinetic energy of wind into mechanical kinetic energy of the rotating mass is maximized through mechanical means by varying the physical moment of inertia of the rotating mass programatically based upon real time sensor data (FIG. 27A,27B). The conversion of the kinetic energy of the rotating mass into electrical energy is maximized through the programatical control of the field coil current of the electromagnet generator based upon real time sensor data (FIG. 62).Type: ApplicationFiled: October 11, 2008Publication date: April 15, 2010Inventor: Michael Scott Aaron