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Electro-hydraulic actuator for controlling the pitch of a blade of a wind turbine

A technology of wind turbines and actuators, which is applied in wind power generation, wind power engines, engine control, etc., and can solve problems such as short service life

Inactive Publication Date: 2010-12-15
MOOG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

additionally, such an arrangement would require the use of large main gears and various hoses in the rotor hub
Due to excessive wear on the main gear due to wind speed changes, the life of the machine of this construction is only as short as about four years

Method used

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  • Electro-hydraulic actuator for controlling the pitch of a blade of a wind turbine
  • Electro-hydraulic actuator for controlling the pitch of a blade of a wind turbine
  • Electro-hydraulic actuator for controlling the pitch of a blade of a wind turbine

Examples

Experimental program
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Embodiment Construction

[0033] At the outset, it should be clearly understood that reference numerals are used to consistently identify the same structural elements, parts or surfaces in the various drawings as these elements, parts or surfaces may be further described or explained throughout the specification, Their detailed description is an integral part throughout the specification. Unless otherwise stated, the drawings should be read in conjunction with the embodiments (eg, cross-hatching, placement of parts, proportions, angles, etc.), and should be considered a part of the description of the present invention. In the description that follows, the words "horizontal," "vertical," "left," "right," "upper," "lower," and their adverb forms (e.g., "horizontally," "rightward," "upward ", etc.) simply refers to the orientation of the structure when a particular drawing is facing the reader. Similarly, "inwardly" and "outwardly" refer generally to the orientation of the surface relative to its axis of...

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PUM

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Abstract

The present invention provides an improvement for use in a wind turbine (20) having a plurality of variable-pitch blades (24) mounted on a hub (23) for rotation relative to a nacelle (22). The improvement broadly includes: a electro-hydraulic actuator (25) for controlling the pitch of one of the blades, the actuator including: a motor (26) adapted to be supplied with a current; a pump (27) drivenby the motor and arranged to provide a hydraulic output as a function of the current supplied to the motor; and a hydraulic actuator (28) operatively arranged to selectively vary the pitch of the associated blade as a function of the hydraulic output of the pump; and wherein the motor, pump and actuator are physically arranged within the hub of the wind turbine.

Description

technical field [0001] The present invention relates to the field of wind turbines, and in particular to an improved wind turbine with a plurality of electro-hydraulic actuators mounted on the rotatable rotor hub of the wind turbine for controlling the same number of The pitch of each blade can be controlled independently. Background technique [0002] Of course, wind turbines are known. In recent years, many problems related to the synchronization of the power supply of wind turbines with the grid have been raised and solved. [0003] Modern wind turbines are relatively advanced. They are usually tower mounted and have multiple (usually three) blades mounted on the rotor hub that rotate about a horizontal axis relative to the nacelle. The nacelle may be oriented in the direction of the incoming wind. Typically each blade has a variable pitch, and the pitch of each blade can be controlled independently of the other blades. These vanes are usually spaced 120° apart. Whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/02
CPCY02E10/723F05B2260/76F05B2270/604F03D7/0224Y02E10/72
Inventor D·盖格
Owner MOOG INC
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