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Rotor blade for a wind energy turbine

A technology of rotor blades and turbines, applied in wind power generation, wind engines, wind turbine components, etc., can solve problems such as difficulty in combining the internal structure of rotor blades, complex structure of the buffer system, etc., and achieve low additional mass, firm structure, and easy manufacturing and the effect of installing

Active Publication Date: 2007-02-21
LM WIND POWER AS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Known damping systems are complex and difficult to integrate into the internal construction of the rotor blade

Method used

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  • Rotor blade for a wind energy turbine
  • Rotor blade for a wind energy turbine
  • Rotor blade for a wind energy turbine

Examples

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Embodiment Construction

[0021] FIG. 1 shows a front view of a rotor 10 for a wind energy turbine, the rotor 10 comprising a hub 12 and three rotor blades 14 extending radially from the hub 12 . Each rotor blade 14 includes a shell 16 defining a root 18 and a tip 20 that limit the longitudinal dimension of the rotor blade 14 (see also figure 2 ). The casing 16 of each rotor blade 14 also defines a leading or forward edge 22 and a trailing or rearward edge 24 relative to the direction of rotation of the rotor 10 (see arrow 26 in FIG. 1 ). The configuration of the casing 16 of each rotor blade 14 also includes a spar 28 having two spar caps 30 , 32 disposed within the casing 16 and extending and connecting the spar caps 30 , 32 within the casing 16 . At least one shear web 34 of . The individual parts of the casing 16 and its spars 28 comprise sandwich and laminate structures that are basically known to those of ordinary skill in the art of manufacturing rotor blades.

[0022] Figures 1 and 2 and i...

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PUM

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Abstract

The rotor blade for a wind energy turbine comprising a longitudinal shell (16) defining a root (18) to be connected to a hub (12) of a rotor (10), a tip (20), a forward edge (22) and a rearward edge (24), the shell (16) having a spar (28) including two spar caps connected via at least one shear web (34) arranged between the forward and rearward edges (22,24) of the shell (16) and extending in the longitudinal direction of the shell (16), and a structural damping system arranged within the shell (16) and having a pendulum (36) including a damped sandwich beam (40) and a mass element (42) located at one end of the beam (40). The beam (40) comprises a sandwich structure including at least three layers comprising at least one damping middle layer (44) arranged between and connected to outer layers (46) of a elastic material. The sandwich beam (40) is connected to the at least one shear web (34) in a cantilevered manner such that the mass element (42) is proximal to the tip (20) of the shell (16) and the beam (40) can be oscillated in a direction (38) towards and away from the forward and rearward edges (22,24) of the shell (16).

Description

technical field [0001] The present invention relates to a passive structural damping system for a wind turbine blade, in particular to a rotor blade for a wind energy turbine comprising damping for damping at least a first edge-wise structural bending mode of the wind turbine blade system. Background technique [0002] The rotor blades of wind energy turbines are subjected to a variety of edge-oriented structural bending modes, which refer to the oscillation of the rotor blades in the plane of rotation. Of these bending modes, the first edge-wise structural bending mode usually has only the poor structural damping effect (only about 1%) caused by typical blade configurations. The first edge-direction structural bending mode typically has a frequency from 1-5 Hz and can be easily excited by wind turbulence. The first edge-direction structural bending mode can generate dynamic loads for all components of the drive shaft of the wind energy turbine, such as high blade root bol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D11/00
CPCF05B2260/96F05B2240/30F16C2360/31F03D11/00Y10S416/50F16F7/104Y02E10/722Y02E10/721F03D1/06F03D80/00Y02E10/72
Inventor L·邦尼特
Owner LM WIND POWER AS
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