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Wind turbine and a method for pitching a blade of a wind turbine

A technology of wind turbine blades and wind turbines, applied in the control of wind engines, wind engines, machines/engines, etc., can solve problems such as unfavorable load distribution, achieve symmetrical and uniform load distribution, reduce strain, and reduce costs

Active Publication Date: 2012-09-12
VESTAS WIND SYST AS
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0007] But these solutions create an unfavorable load distribution

Method used

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  • Wind turbine and a method for pitching a blade of a wind turbine
  • Wind turbine and a method for pitching a blade of a wind turbine
  • Wind turbine and a method for pitching a blade of a wind turbine

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Embodiment Construction

[0095] Detailed description of related technologies

[0096] figure 1 A wind turbine 1 is shown comprising a tower 2 and a wind turbine nacelle 3 on top of the tower 2 . A wind turbine rotor 4 comprising three wind turbine blades 5 is connected to the nacelle 3 via a low speed shaft protruding out of the front of the nacelle 3 .

[0097] figure 2 A wind turbine rotor 4 comprising a hub 7 and three blades 5 is shown seen from the front.

[0098]As shown, a pitch bearing 9 is arranged between the blade 5 and the hub 7 to enable the blade 5 to rotate about its longitudinal axis and transmit forces mainly from three different sources. The blade 5 (and of course the bearing 9 itself) is under the constant influence of gravity. The direction of gravity changes depending on the position of the blade 5 , resulting in different loads on the pitch bearing 9 . When the blade is in motion, the bearing 9 is also subject to centrifugal forces which generate mainly axial tension in the...

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Abstract

The present invention relates to a wind turbine and a method for pitching a blade of a wind turbine. The wind turbine (1) comprises at least one wind turbine blade assembly (28). The blade assembly (28) includes a blade (5) and a pitch bearing arranged between the blade (5) and a hub of the wind turbine, the blade assembly further including two or more hydraulic pitch cylinders for pitching the blade in relation to the hub The wind turbine (1) is characterised in that the two or more hydraulic pitch cylinders (10) are arranged to expand in the same angular direction around the rotational axis of the pitch bearing (9).

Description

technical field [0001] The invention relates to a wind turbine comprising at least one wind turbine blade assembly. The blade assembly includes a blade and a pitch bearing arranged between the blade and a hub of the wind turbine, and also includes two or more hydraulic pitch cylinders for pitching the blade relative to the hub. The invention also relates to a method for pitching a blade of a wind turbine. Background technique [0002] A wind turbine known in the prior art comprises a wind turbine tower and a wind turbine nacelle on top of the tower. The wind turbine rotor with three wind turbine blades is connected to the nacelle via a low-speed shaft, such as figure 1 shown. [0003] Modern wind turbines control the load on the rotor by pitching the blades into and out of the wind. Pitch the blades to optimize power output, or protect wind turbines from overload damage. [0004] For pitching, each blade is provided with a pitching device consisting of a pitch bearing b...

Claims

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Application Information

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IPC IPC(8): F03D1/06F03D7/02
CPCF03D1/0658F03D7/0224F05B2270/604Y02E10/72
Inventor J·L·安德森J·B·马德森
Owner VESTAS WIND SYST AS
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