Wind turbine wind pressure variable-pitch whole-process control device

A control device and pitch variable technology, which is applied in the control of wind turbines, engine control, wind turbines, etc., can solve the problems that the wind turbine cannot be fully controlled, elastic materials are prone to fatigue failure, and the pitch angle adjustment range is small. Achieve excellent anti-gale performance, compact structure, and adapt to a wide range of wind speeds

Inactive Publication Date: 2017-06-13
赵福盛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The overall translational wind pressure and pitch mechanism of the wind wheel has a large inertia of the wind wheel, slow response to changes in wind speed and pressure, severe wear and tear of parts, and cannot realize the full control of the pitch of the wind turbine from 0° to 90°; The wind pressure variable pitch structure with the elastic material at the root of the blade is bent, the pitch angle adjustment range is small, the elastic material is prone to fatigue failure, and the operating life is short

Method used

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  • Wind turbine wind pressure variable-pitch whole-process control device
  • Wind turbine wind pressure variable-pitch whole-process control device
  • Wind turbine wind pressure variable-pitch whole-process control device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 As shown, the wind pressure variable pitch control device of the present invention includes a hub 4, a blade 1 and a pitch actuator, and the hub includes a left end face, a right end face and three evenly distributed hollow disc-shaped circular end faces. A spoke sleeve 3 is fixed on each circular end surface, and a paddle shaft 2 is installed in the spoke sleeve. The paddle shaft and the spoke sleeve are coaxial, and the paddle shaft can rotate flexibly in the spoke sleeve. The rocker arm 5 that can rotate the blade shaft is installed, and the flange plate connecting the blade is installed on the outer end. The blade is fixed on the flange plate. There is a certain angle between 25 and the blade shaft axis 24, such as figure 2 As shown, the included angle is 3 degrees in this embodiment.

[0038] Such as figure 1 , 3As shown, the pitch actuator includes a pitch mechanism seat 11, a pull rod 6, a synchronous disk 7 and a shear elastic balance unit,...

Embodiment 2

[0054] The difference between this embodiment and Embodiment 1 is that the hub includes a left end face, a right end face, and four evenly distributed hollow disk-shaped circular end faces, that is to say, there are four blades, and the distance between the chord line of the blade and the axis of the blade shaft after assembly is The included angle between them is 5 degrees, and the compression rod I, the compression rod II and the tension spring (or torsion spring) in the shear elastic balance unit are configured in 5 groups.

[0055] All the other are identical with embodiment 1.

Embodiment 3

[0057] The difference between this embodiment and Embodiment 1 is that the hub includes a left end face, a right end face, and six evenly distributed hollow disc-shaped circular end faces, that is to say, there are six blades, and the distance between the chord line of the blade and the axis of the blade shaft after assembly is The included angle between them is 8 degrees, and there are 8 sets of compression rod I, compression rod II and tension spring (or torsion spring) configuration components in the shear elastic balance unit.

[0058] All the other are identical with embodiment 1.

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Abstract

The invention relates to the field of wind turbine rotation speed and output power regulating control devices, and discloses a wind turbine wind pressure variable-pitch whole-process control device, which comprises a hub, a paddle and a variable-pitch actuator. The variable-pitch actuator comprises a variable-pitch device base, a pull rod, a synchronous plate and a shear elastic force balance unit; the variable-pitch device base is fixed on the left end face of the hub; a guide pipe is arranged on the variable-pitch device base; the synchronous plate is arranged on the guide pipe; the shear elastic force balance unit comprises a fixed support I, a fixed support II, a pressing rod I, a pressing rod II and a balance spring. The wind turbine wind pressure variable-pitch whole-process control device provided by the invention is applicable to a small wind turbine, can realize whole-process automatic regulating control on variable-pitch from 0 to 90 degrees during wind turbine operation, and can carry out automatically feathering halt without the need for watching over and maintaining when disastrous gale (larger than 25m/s) occurs; the wind turbine provided with the device is wide in adaptive wind speed range, can efficiently, stably and safely operate within the working wind speed range (3 to 25m/s), and is low in noise and high in annual energy output.

Description

technical field [0001] The invention relates to the field of adjustment and control devices for the rotational speed and output power of a wind turbine, in particular to a wind pressure variable pitch full-range control device for a wind turbine. Background technique [0002] The working wind speed range of the wind turbine is usually 3-25m / s. In the working wind speed range, the safe operation speed and stable output power should be ensured. When the wind speed is greater than 25m / s, it must be automatically shut down. The speed and output power of the wind turbine will increase with the increase of wind speed, if it exceeds the allowable range, it may cause fatal damage to the wind turbine. In order to prevent the over-speed and over-power of the wind turbine, it must be regulated. The control methods include wind rotor deviation from the wind direction, constant pitch stall, and changing the blade pitch angle. Changing the blade pitch angle is a more advanced and reasonab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/02F03D7/04
CPCF03D7/0224F03D7/0268F03D7/04F05B2270/1014F05B2270/1033F05B2270/32F05B2270/508Y02E10/72
Inventor 赵福盛
Owner 赵福盛
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