Noise reduction device of blade of wind generating set

A technology of wind turbines and blades, which is applied in the control of wind turbines, wind turbines, and wind turbines in the same direction as the wind. Wind noise, implementable effects

Inactive Publication Date: 2018-09-14
ZHEJIANG WINDEY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the inability to eliminate low-frequency noise in the existing wind turbine noise reduction methods, the present invention provides a noise reduction device for wind turbine blades, which can reduce the sound power level of blade sweeping noise and suppress noise modulation at the same time. Reduces noise annoyance, has the advantages of simple structure, low cost, and strong implementability

Method used

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  • Noise reduction device of blade of wind generating set
  • Noise reduction device of blade of wind generating set
  • Noise reduction device of blade of wind generating set

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] refer to Figure 1 ~ Figure 3 , a noise reduction device for a blade of a wind power generating set, the noise reducing device is a zigzag strip structure 2, and the zigzag strip structure 2 is installed at the tail of the blade of a wind power generating set with a wingspan of 70%-100% The sawtooth strip structure includes sawtooth and a mounting surface, and the sawtooth height 8 is 10%-20% of the local airfoil chord length 6 of the blade, and fluctuates in a half-sine wave.

[0018] Further, the sawtooth width 7 is 25%-50% of the sawtooth height 8 .

[0019] Still further, the height 9 of the mounting surface is 25%-50% of the sawtooth height 8, not less than 50mm.

[0020] The manufacturing material of the zigzag strip structure 2 is glass fiber composite material or carbon fiber composite material, and the thickness of the zigzag strip structure 2 is not ...

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Abstract

The invention discloses a noise reduction device of a blade of a wind generating set. The noise reduction device is of a sawtooth-shaped strip-shaped structure, the sawtooth-shaped strip-shaped structure is arranged at the trailing edge of 70%-100% of a wingspan of the blade of the wind generating set, the sawtooth-shaped strip-shaped structure comprises saw teeth and a mounting surface, the height of the sawteeth is 10%-20% of the local chord length of the blade, and the saw teeth are in a half-sine wave fluctuation. The noise reduction device for the blade of the wind generating set can reduce the noise sound power level of the blade, meanwhile, noise modulation is inhibited, the noise annoyance degree is reduced, the advantages of being simple in structure and low in cost are achieved,and the feasibility is high.

Description

technical field [0001] The invention belongs to the field of wind power generators and relates to a noise reduction device for blades of wind power generators. Background technique [0002] With the gradual development of wind resources, some wind power generators have been installed in densely populated areas, which has brought about the noise disturbance of wind power generators, which has brought stability to the local residents of the wind farm, and has also increased the development of wind power resources. The difficulty is not conducive to the development of the industry, and the demand for noise reduction of wind turbines is extremely urgent. [0003] The main noise source of wind turbines is blade sweeping noise. It has been patented to install noise reduction devices such as sawtooth bars and brushes on the trailing edge of the blades and optimize the structure. Chinese patent 201610140112.6 optimizes the angle of individual sawtooth. Chinese patent 201610728252.5...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D1/06F03D7/02F03D80/00
CPCF03D1/0633F03D1/0675F03D7/0296F03D80/00Y02E10/72Y02P70/50
Inventor 刘伟江周民强陈棋
Owner ZHEJIANG WINDEY
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