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Device for controlling loading and deformation of wind turbine blade

A technology of wind turbine blades and loads, which is applied in the direction of wind turbines, wind turbines, and control of wind turbines in the same direction as the wind. It can solve the problems of reduced braking efficiency, slow dynamic response, and complicated installation, so as to reduce dynamic imbalance. , small power consumption, effect of reducing load

Active Publication Date: 2014-12-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional mechanical brakes convert kinetic energy into heat energy through the wear of the brake pads, which not only reduces the braking efficiency, but also increases additional energy consumption.
In addition, slow dynamic response and complicated installation are common problems in existing control methods.

Method used

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  • Device for controlling loading and deformation of wind turbine blade
  • Device for controlling loading and deformation of wind turbine blade
  • Device for controlling loading and deformation of wind turbine blade

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Embodiment Construction

[0031] A device for controlling the load and deformation of wind turbine blades proposed by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] like figure 1 , 2 As shown in and 3, a device for controlling the load and deformation of wind turbine blades includes a damping regulator 2, a rotating shaft fixing device 3, a rotating shaft 4, a freely rotating blade 5, a rudder surface 7, a steering gear 6, a transmission rod 8, and a hinge 9. The radial length of the freely rotating blade 5 is 5% to 50% of the radial length of the wind turbine blade 1, and the radial length of the freely rotating blade 5 is determined according to factors such as the use environment and the length of the wind turbine blade 1. Its plane shape is straight form or sharpened form, and the cross-sectional shape of freely rotating blade 5 matches the cross-sectional shape of wind turbine blade 1 top, and the section chord length of freely rot...

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Abstract

The invention discloses a device for controlling loading and deformation of a wind turbine blade. The device is characterized in that the tip of the wind turbine blade is provided with a free rotation-type blade with proper length; a steering engine in the free rotation-type blade is connected with a control plane at the rear through a drive rod; the control plane is driven by the steering engine to rotate, and therefore the aerodynamic configuration of the free rotation-type blade is changed; the free rotation-type blade rotates around the wind turbine blade under the action of aerodynamic moment to change an angle of attack between the free rotation-type blade and incoming flow, and therefore the aerodynamic loading and deformation of the wind turbine blade are controlled. The device disclosed by the invention is broader in application range, and certain modification is performed on the traditional mature commercial wind turbine blade; not only is the precious time saved and the cost of redevelopment reduced but also the aerodynamic performance of the wind turbine blade under different working conditions can be improved; the output power of a wind turbine under different incoming flow conditions is stabilized; the working envelope of the wind turbine is enlarged, and therefore the annual energy output of the wind turbine is advantageously increased, and the safety of the blade and related equipment is also enhanced.

Description

technical field [0001] The invention belongs to the technical field of wind power machines, in particular to a wind power machine auxiliary device. Background technique [0002] As human society enters the 21st century, environmental pollution and the depletion of traditional petrochemical resources are getting more and more attention. The development and use of new energy has become a common task for the whole world. Among them, wind energy, as a kind of renewable clean energy, is being used more and more widely, and large-scale grid-connected horizontal axis wind turbines (hereinafter referred to as wind turbines) have become the main form of utilizing wind energy. [0003] The blades of the wind turbine are used as wind-catching devices to absorb wind energy. The design of the blades directly determines the performance and reliability of the unit. In the last ten years, with the use of new materials and new technologies, the length of blades has increased from more than ...

Claims

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Application Information

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IPC IPC(8): F03D1/06F03D7/04
CPCF03D1/06F03D7/04Y02E10/72
Inventor 顾蕴松李琳恺孙之骏
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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