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Wind turbine blade with lift-regulating means in form of slots or holes

一种风力涡轮机、调节装置的技术，应用在与风向一致的的风力发动机、风力发动机、风力发动机的控制等方向，能够解决液压技术不适于快速且几乎瞬时的运动、风力涡轮机不能特别快地进行调整等问题

Active Publication Date: 2009-12-16
LM GLASSFIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the wind turbine according to US6361275 has the disadvantage that it cannot be adjusted particularly quickly, for which conventional blade pitch hydraulics are used
This hydraulic technique is not suitable for fast and almost instantaneous movements due to the considerable inertia of wind turbine blades with static loads that can exceed 10 tons

Method used

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  • Wind turbine blade with lift-regulating means in form of slots or holes
  • Wind turbine blade with lift-regulating means in form of slots or holes
  • Wind turbine blade with lift-regulating means in form of slots or holes

Examples

Experimental program
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Effect test

Embodiment Construction

[0043] figure 1 A conventional modern wind turbine is shown having a tower 4 , a nacelle 6 and a rotor comprising a hub 8 and three blades 10 extending from the hub 8 . The blade 10 may be provided with a lift regulating device which can gradually reduce the blade lift in a region extending from the blade tip 14 to a position between the blade tip and the blade root 16 at high wind speeds by activating the actuating device. As a result, at high wind speeds, the blade 10 is unloaded in the region extending inwardly from the blade tip 14 towards the root 16, so that a wind turbine 2 with a given blade 10 can still operate at higher wind speeds than usual. The invention also makes it possible to provide a wind turbine 2 with longer blades 10' than usual, which at increased wind speeds and thus under increased loads are only unloaded by the lift regulating means, so that the turbine and the blades are overloaded be avoided.

[0044] figure 2 A schematic diagram showing a first...

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Abstract

The blade (10) comprises adjustable lift-regulating means extending in the longitudinal direction of the blade (10), and activating means by means of which the lift-regulating means can be adjusted and thus alter the aerodynamic properties of the blade (10). The lift-regulating means are adapted and arranged so that by activation of the activating means, the lift can be reduced in a zone extending in the longitudinal direction of the blade (10) from a first position in proximity to the blade tip (14) to a second position between the first position and the root area (16) and this second position being variable in the longitudinal direction of the blade. The lift-regulating means are formed of at least one slot (12, 13, 15) or a number of holes (42, 43, 45, 52, 53, 55) arranged in at least one longitudinally extending zone, thereby allowing an interior cavity (22, 23, 25) of the blade (10) to communicate with the exterior. The lift-regulating means are adjustable by means of one or more activating means to regulate the amount of air emitted from the interior cavity (22, 23, 25) to the exterior to alter the aerodynamic properties of the blade (10).

Description

technical field [0001] Disclosed is a blade for a wind turbine rotor having a hub body, the blade extending longitudinally along a longitudinal axis and having a root region closest to the hub body and a tip region furthest from the hub body, the blade having a defining wing along at least a part of the longitudinal direction of the blade The airfoil has a pressure side and a suction side in normal operation, and also has a leading edge and a trailing edge, which define a chord line extending therebetween, and the blade is included in the longitudinal direction of the blade An extended adjustable lift regulating device, and an actuating device by which the lift regulating device can be adjusted and thus the aerodynamic properties of the blade can be changed. The lift regulating means are adjusted and arranged to reduce the lift force in a region extending in the longitudinal direction of the blade from a first position close to the blade tip to a second position between the fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00F03D7/02F03D1/06
CPCF05B2270/32Y02E10/721F05B2270/324F05B2270/331Y02E10/723F03D7/0244F05B2260/901F05B2240/30F03D1/0633F03D7/022F05B2270/1011Y02E10/72
Inventor S·博夫P·格拉鲍
Owner LM GLASSFIBER
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