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Hydraulic yaw system and regulation and control method thereof for wind generating set

A yaw system and yaw technology, applied in the control of wind turbines, wind turbines, wind power generation, etc.

Inactive Publication Date: 2013-04-17
CHINA CREATIVE WIND ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]This traditional yaw system responds slowly, and the inertia and instability have a great impact on the yaw gear of the wind turbine, and will affect the wind turbine base. Fatigue strength, resulting in cracking or even destruction of the gearbox base
At the same time, this kind of yaw system requires the yaw brake to be in a locked state for a long time, which will cause great wear and tear on the brake disc, and the brake disc needs to be replaced frequently

Method used

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  • Hydraulic yaw system and regulation and control method thereof for wind generating set
  • Hydraulic yaw system and regulation and control method thereof for wind generating set
  • Hydraulic yaw system and regulation and control method thereof for wind generating set

Examples

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Embodiment 1

[0020] Embodiment 1: This example is suitable for 1.5MW fan, such as figure 1 , figure 2 , Figure 5 As shown, the hydraulic yaw system of the present invention includes three yaw motors 2, 3, 4 that provide normal torque during yaw operation, and three yaw motors 2, 3, 4 that provide reverse torque yaw hydraulic pressure Motor 1, yaw bearing 7 and yaw brake device, yaw hydraulic motor 1 provides reverse torque less than the normal torque provided by three yaw motors 2, 3, 4, yaw hydraulic motor 1 and three yaw motors 2 , 3, 4 output ends are equipped with reducer gear 10 respectively, and described reducer gear 10 all meshes with the external gear of yaw bearing 7, and yaw bearing 7 tops are connected and fixed with gearbox base 9, as image 3 , Figure 4 As shown, the yaw brake device includes a yaw brake friction disc 5 and a yaw brake brake 6, the lower part of the yaw bearing 7 is connected and fixed with the yaw brake friction disc 5, and the yaw brake brake 6 is fi...

Embodiment 2

[0025] Embodiment 2: The difference between this embodiment and Embodiment 1 is that two yaw hydraulic motors and two yaw motors are used in this embodiment, and the direction of torque provided by one yaw hydraulic motor is opposite to that provided by the other yaw motors.

Embodiment 3

[0026] Embodiment 3: The difference between this embodiment and Embodiment 1 is that four yaw hydraulic motors are used in this embodiment, and the torque direction provided by one yaw hydraulic motor is opposite to that provided by the other yaw hydraulic motors.

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Abstract

The invention provides a hydraulic yaw system and a regulation and control method thereof for a wind generating set and belongs to the technical field of wind power. By setting a plurality of yaw motors which provide normal torque and a yaw hydraulic motor which provides reverse torque, the yaw motor and yaw hydraulic motor respectively are connected with a yaw bearing through the gear of a speed reducer. When a yawing happens, the reverse torque provided from the yaw hydraulic motor is less than the normal torque provided from the yaw motor. According to sensing signals, cooperation between a fan and a wind direction is judged; when a wind wheel is perpendicular to the wind direction through the rotation of a fan, and the wind wheel is windward, the torque of the yaw motor and the torque of the hydraulic motor are equal until the yawing ends, then a yaw brake and a yaw brake friction disc stop working, through the engagement between the gear of the reducer and the gear of a yaw bearing, the entire yaw system is balanced. By the hydraulic yaw system and the regulation and control method thereof, the rotation impact of yawing is effectively slowed down, and the yawing is operated gently.

Description

technical field [0001] The invention belongs to the technical field of wind power, and in particular relates to a hydraulic yaw system for a wind power generator set and a control method thereof, and is particularly suitable for the application of the yaw system of a large wind power generator set. technical background [0002] As a clean energy source, wind power generators have been widely used at present. At present, there are mainly the following types of large-scale commercial wind power generators: double-fed variable speed constant frequency wind power generators, semi-direct drive variable speed constant frequency generators and direct drive variable speed constant frequency generators . These wind turbines use an electric yaw system to adjust the rotor and align it with the wind. The yaw system generally includes a wind vane that senses the wind direction, a yaw motor, a yaw planetary gear reducer, a large gear of the gyratory body, etc. Its working principle is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00
CPCY02E10/72
Inventor 王冠一蔡晓峰刘衍选
Owner CHINA CREATIVE WIND ENERGY
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