Anti-noise wind-powered generator

A technology for wind turbines and mechanical devices, which is applied in the directions of wind turbines, control of wind turbines, motors, etc., can solve problems such as the inability to guarantee compliance with the standard of the maximum noise level of wind turbines, reliability problems, etc.

Inactive Publication Date: 2009-04-15
GAMESA INNOVATION & TECH SA
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  • Abstract
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Problems solved by technology

[0007] These solutions have reliability issues and using only one method does not guarantee compliance with the maximum noise level for wind turbines

Method used

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  • Anti-noise wind-powered generator

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Embodiment Construction

[0016] The wind turbine 11 according to the invention comprises a rotor with at least one blade 13 having an aerodynamic profile on the leading and trailing edges, combined into a cyclic control system that allows the lift of each blade 13 to be adjusted. The azimuthal distribution over its radius R or only over a portion of its length L from the tip can be achieved by various mechanical means as described below.

[0017] Because the wind turbine has these characteristics, the measurement according to the Sirocco project implementation method can effectively reduce the noise emission. The noise caused by the wind turbine 11 is mainly generated in the area 15 on the fan-shaped part S defined by the rotor plane between the two hypothetical radii, According to the direction of blade rotation, the blade reaches the maximum height at the assumed radius of 10° to 170°, so the control method is to reduce the lift force of the blade in this region only (especially in the noisy sector o...

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Abstract

Wind-powered generator (11) that comprises a blade rotor that actuates an electric generator and means for controlling said rotor, in which the blades (13) include means that allow reduction of their lift over a length L, measured from their tip, less than or equal to their radius R, and said control means allow cyclic activation of said lift-reduction means during the passage of each blade over a circular sector S that is less than or equal to 160 DEG . The invention also relates to a method for operating said wind-powered generator in which said lift-reduction means are actuated cyclically during the passage of each blade over a circular sector S delimited between two hypothetical radii located, according to the direction of rotation of the blades, at 10 DEG and 170 DEG with respect to the hypothetical radius on which a blade (13) achieves maximum height.

Description

technical field [0001] The present invention relates to a wind turbine with a blade rotor having a mechanism for reducing aerodynamic noise generated by the rotor rotation during wind power generation. Background technique [0002] Wind turbines are a major source of noise, as their blades generate aerodynamic noise due to the interaction of the boundary layer at the trailing edge of the blades. [0003] The prior art proposes to reduce said noise by equipping rotor blades with toothed elements on the trailing edge. [0004] Patent EP0652367 proposes to equip rotor blades with different types of toothed trailing edges. [0005] Patent EP1314885 proposes to equip rotor blades with panels having a toothed shape at the trailing edge. [0006] Patent EP1338793 proposes to equip blades with a toothed trailing edge, the length of the teeth and the spacing between the teeth along the length of the blade are variable. [0007] There are reliability issues with these solutions, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00
CPCY02E10/723F05B2260/96F05B2260/962F03D7/022F05B2240/31F05B2270/32F05B2260/78Y02E10/721F03D7/0296Y02E10/72F03D7/0224
Inventor 阿尔瓦罗·马特桑斯希尔
Owner GAMESA INNOVATION & TECH SA
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