A device for controlling the load and deformation of wind turbine blades

A wind turbine blade and load technology, applied in wind turbines, wind turbines, wind turbine control and other directions that are consistent with the wind direction, can solve the problems of reduced braking efficiency, slow dynamic response, increased energy consumption, etc. Balanced, low power consumption, effect of suppressing deformation

Active Publication Date: 2017-11-07
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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  • A device for controlling the load and deformation of wind turbine blades
  • A device for controlling the load and deformation of wind turbine blades
  • A device for controlling the load and deformation of wind turbine blades

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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] Such as 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 ...

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Abstract

Disclosed is an apparatus for controlling the load and deformation of a wind turbine blade. A free rotation type blade (5) of an appropriate length is mounted on a blade tip of a wind turbine blade (1), and a steering engine (6) inside the free rotation type blade (5) is connected to a rear control plane (7) through a transmission rod (8); the steering engine (6) drives the control plane (7) to rotate, thereby changing the aerodynamic configuration of the free rotation type blade (5); and the free rotation type blade (5) generates rotation around the wind turbine blade (1) under the action of an aerodynamic moment and changes the angle of attack between an incoming flow and same, thereby controlling the aerodynamic load and deformation of the wind turbine blade (1). The apparatus can improve the aerodynamic performance of the wind turbine blade in different operating conditions, and stabilize the output power of a wind turbine in different incoming flow conditions, thereby expanding the operating envelope of the wind turbine, aiding in increasing the annual power output of the wind turbine, and also improving the safety of the blade and related devices.

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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Patent Type & Authority Patents(China)
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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