Method for restraining wind turbine blade adopting compound damping structure from vibrating

A technology of wind turbine blades and composite damping, which is applied to wind turbines, wind turbine components, engines, etc., can solve the problems of large flexible blades of wind turbines that are prone to flutter and lack of prevention methods, and achieve good vibration suppression performance and improved Aerodynamic stability, the effect of increasing production costs

Active Publication Date: 2013-09-25
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0013] In order to solve the problem that large flexible blades of wind turbines are prone to flutter and lack effective prevention and c

Method used

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  • Method for restraining wind turbine blade adopting compound damping structure from vibrating
  • Method for restraining wind turbine blade adopting compound damping structure from vibrating
  • Method for restraining wind turbine blade adopting compound damping structure from vibrating

Examples

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Embodiment 1

[0056] Take a certain 2500 kW wind turbine as an example. The wind turbine is mainly used in offshore wind farms. Its design power is 2.5 MW. It adopts the form of three blades. The material of the leaf skin is GRP. The main design parameters are shown in Table 1.

[0057] serial number Design volume design value 1 Number of wind rotor blades 3 2 Speed / rpm 10.5～19.0 3 Rotor diameter / m 80 4 Frontal area / m 2 5 026 5 Power adjustment method variable pitch 6 Start wind speed / m / s 4 7 Rated power wind speed / m / s 15 8 Shutdown wind speed / m / s 25 9 Safe wind speed / m / s 65 10 pitch adjustment single drive 11 Total weight of wind wheel / kg 50 000 12 Blade length / m 38.8 13 Blade weight / kg 8 700 14 blade material GRP

[0058] (1) airfoil selection

[0059] According to the design requirements, the NACA 6413 airfoil is selected for the entire blade, which has a large lift-to...

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Abstract

The invention specifically discloses a method for restraining a wind turbine blade adopting a compound damping structure from vibrating, which solves the problem that vibration easily caused by a large-scale flexible blade cannot be effectively prevented and eliminated by using a method. The method for restraining the wind turbine blade adopting the compound damping structure from vibrating comprises the following specific steps: a co-cured constrained damping layer is arranged on the surface of the blade, and a free damping layer is arranged on the outer surface of a girder; the free damping layer is formed by a single layer of damping material, and damping viscoelastic material, damping alloy or damping compound material is selected; the co-cured formation of the co-cured constrained damping layer is achieved by arranging a compound material layer and a damping material layer in a staggered manner, the compound material layer is made of fibre glass compound material, carbon fibre compound material or glass and carbon fibre compound material, and the damping material layer is made of the damping viscoelastic material. Compared with the prior art, the method has universal applicability, effective vibration restraining performance, economical efficiency and designability.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a vibration suppression method for wind turbine blades using a composite damping structure. Background technique [0002] As environmental issues are getting more and more attention, clean energy has gradually become the mainstream of world energy development. As a renewable clean energy, wind energy has developed rapidly in recent years, and MW-level wind turbines have become the mainstream models of wind turbines. In order to meet the high power output requirements of wind turbines, wind turbine blades are becoming larger and thinner (for example, the length of a single blade produced by a foreign company has reached 55 meters). Large slender blades flutter under complex loads of aerodynamic force, elastic force and inertial force, and the main flutter forms are edgwise vibration and flapwise vibration. The fluttering of the blades not only reduces the power out...

Claims

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Application Information

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IPC IPC(8): F03D11/00
CPCY02E10/72
Inventor 孙大刚李占龙韩斌慧章新宋勇
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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