Patent application number | Description | Published |
20090016884 | DEVICE AND METHOD FOR ADJUSTING ANGLE-OF-ATTACK OF WIND BLADES IN LIFT-TYPE VERTICAL AXIS WIND TURBINE - A device for adjusting an angle-of-attack (δ) of blades in a lift-type vertical axis turbine comprising a vertical rotating axis, a rotatable cantilever support wing fixed on the vertical rotating axis, a wind rotor comprising a plurality of blades mounted on the cantilever support wing, at least one cam disposed along an axial direction of the vertical rotating axis, the axial direction of the cam being parallel to the rotating axis, and for any point in a contour line of the cam, the angle of attack δ being set according to the following formula: δ=β−α, wherein δ is the angle of attack; β is an azimuth angle; α is a rotating angle for blades; and δ, β, and α are preset values. | 01-15-2009 |
20090016892 | VERTICAL SHAFT WIND TURBINE AND METHOD OF INSTALLING BLADES THEREIN - This invention relates to a vertical shaft wind turbine, and particularly to an installation method of blades that can effectively improve the efficiency of a vertical shaft wind turbine. A supporting plane is connected to vertical shaft and a blade is installed on supporting plane. The airfoil of the blade is an asymmetrical camber airfoil. The convex surface of blade is installed facing the vertical shaft. The blade rotary angle is in the range of 0-15 degrees. This invention represents a remarkable progress in the field of wind power generation and is applicable industrially. | 01-15-2009 |
20090100676 | VERTICAL AXIS WIND TURBINE AND METHOD OF INSTALLING BLADES THEREIN - A vertical axis wind turbine comprising: a plurality of support arms ( | 04-23-2009 |
20090196753 | BLADE SUPPORT LIMB FOR VERTICAL AXIS WIND TURBINE - A blade support limb structure of vertical axis wind power generator includes a fixed support limb ( | 08-06-2009 |
20110076154 | SUPPORT FOR A LARGE VERTICAL AXIS WIND TURBINE - A support for a large vertical axis wind turbine including a tower frame, a platform, a vertical central axis, and a vertical axis windmill including a plurality of blades and supporting arms. The platform is disposed on the tower frame for installing and fixing a generator. The vertical central axis and the vertical axis windmill are supported by the tower frame. The tower frame is a truss structure and includes at least three sub-tower frames which are in parallel with each other and form a regular polygon from top view. The sub-tower frames are a hollow truss structure. The ratio of a diameter of the vertical axis windmill to a distance between two adjacent sub-tower frames is between 2.5 and 6. The ratio of the diameter of the vertical axis windmill to a height of the tower frame is between 3 and 0.5. | 03-31-2011 |
20110239460 | APPARATUS AND METHOD FOR TRANSPORTING VERTICAL AXIS WIND TURBINE - The invention relates to a vertical axis wind turbine, and in particular to an apparatus and method for transporting the vertical axis wind turbine. The method for transporting the vertical axis wind turbine, including the steps of: employing an apparatus to be a box or frame; situating a generator horizontally in the apparatus; fixing an upper flange and lower flange to a vertical shaft; fixing the base of the generator on the corresponding surface of the apparatus through holes at the base of the generator; and supporting the other end of the vertical shaft by a supporting object. | 10-06-2011 |
20110248510 | VERTICAL AXIS WIND TURBINE - A vertical axis wind turbine including: a vertical axis wind mill having a vertical shaft and a generator having a generator rotor shaft, wherein the vertical shaft of the wind mill share the same shaft with the generator rotor shaft. This arrangement simplifies the structure and increases the stability, reliability, and service lifetime of vertical axis wind turbines by making on-site assembly easy and cutting the on-site workload and cost, without undermining the wind resistance capability and safety prompting wider application of vertical axis wind turbines. | 10-13-2011 |
20110272224 | BRAKE SYSTEM FOR AND METHOD FOR BRAKING OF VERTICAL AXIS WIND TURBINE - A brake system for a vertical axis wind turbine including a brake device ( | 11-10-2011 |
20120003092 | WIND MILL STRUCTURE OF LIFT-TYPE VERTICAL AXIS WIND TURBINE - A wind mill structure of a lift-type vertical axis wind turbine. The lift-type vertical axis wind turbine includes a vertical shaft and the wind mill includes a plurality of blades and supporting arms. The supporting arms hold the blades, and the blades are connected to the vertical shaft via the supporting arms. A setting angle, formed by a chord of the blades and a tangent line that goes through the center of the blades, ranges from −12° to 12°. An angle, formed by the chord of the blade and the rotatable supporting arm, ranges from 7° to 100°. The wind mill can maintain relatively stable rotation speeds under wind speeds exceeding the rated wind speed by adjusting the angle of the supporting arms, thereby ensuring stable output from the vertical axis wind turbine. | 01-05-2012 |