Variable pre-taper angle device for wind wheel of wind turbine generator and use method

A technology of wind turbines and pre-cone angles, which is applied to wind turbines, wind power generation, wind turbines, etc. in the same direction as the wind. It can solve problems such as reducing power generation, tower collisions, and blade deformation, and achieve reduced maintenance costs. The effect of increasing the service life

Active Publication Date: 2021-08-06
HUANENG CLEAN ENERGY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the pre-cone angle of the wind rotor of the conventional wind turbine is fixed, when the large-scale development of the wind turbine, the deformation of the long flexible blade tip of the large-scale wind turbine can reach 7-8 meters, if the design is too small to meet the clearance requirements, it will cause blade deformation and tower If the design is too large, it will affect the effective sweeping area of ​​the wind rotor and reduce the power generation

Method used

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  • Variable pre-taper angle device for wind wheel of wind turbine generator and use method
  • Variable pre-taper angle device for wind wheel of wind turbine generator and use method
  • Variable pre-taper angle device for wind wheel of wind turbine generator and use method

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Embodiment 1

[0037] see Figure 1 to Figure 7 , the present invention provides a variable pre-cone angle device for a wind turbine of a wind turbine, comprising a tower 1, a nacelle 2 is installed on the top of the tower 1, a main shaft 3 is installed on the nacelle 2, and a connecting seat 9 is connected to the other end of the main shaft 3 The hub 4 is installed on the outside of the connecting seat 9, the hub 4 is connected with the blade root connection section 5, the blade root connection section 5 is connected with the blade root 7, and the blade root 7 is connected with the blade 6.

[0038] The connecting seat 9 is arranged in a Y shape, including three protrusions 91; the three protrusions 91 are evenly arranged, and the angle between them is 120°. The top of the boss 91 is provided with a gear ring 10, and the inner wall of the gear ring 10 is provided with a fixing groove 21, through which the pitch bearing 11 is installed in the gear ring 10, and the pitch bearing 11 is provide...

Embodiment 2

[0046] The present invention also provides a method for using a variable pre-cone angle device for a wind turbine rotor, comprising the following steps:

[0047] Step 1: Use the power supply after power generation to provide the required electric energy to the internal electrical appliances. After the installation of each device is completed, the blades 6 are rotated by the blowing of wind energy, and the rotation of the blades 6 causes the hub 4 and the main shaft 3 to rotate. , so that the main shaft 3 converts the kinetic energy transmission into electric energy for use.

[0048] Step 2: Adjust the pre-cone angle of the blade 6 according to different situations. When in use, according to the different wind directions, the motor 18 drives the toothed roller 19 to rotate. The moving blade root 7 makes the blade 6 rotate on the pitch bearing 11 through the fixed disk 13 to adjust the angle; the pitch bearing 11 rotates inside the fixed groove 21 through the fixed rod 23 and th...

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Abstract

The invention provides a variable pre-taper angle device for a wind wheel of a wind turbine generator and a using method. The variable pre-taper angle device comprises a connecting seat, a hub, blade roots and blades; the hub is installed outside the connecting seat, a blade root connecting section is connected to the hub, the blade roots are connected to the blade root connecting section, and the blades are connected to the blade roots; three convex columns are uniformly distributed on the connecting seat; a gear ring is arranged at the top of each convex column, a fixing groove is formed in the inner wall of each gear ring, and variable pitch bearings are installed in the gear rings through the fixing grooves; the blade roots are fixed to the variable pitch bearings; slots are formed in the blade roots, fixing plates are installed in the slots, the fixing plates are connected with motor bases located on the outer side of the slots, and motors are installed on the motor bases; and an output shaft of each motor is connected with a tooth roller, and the tooth rollers mesh with the gear rings. When the wind speed is small, the cone angle of the blades can be reduced, the wind sweeping area is increased, and the productivity efficiency is improved; and when the wind speed is large or the blade deformation is large, the blade taper angle is increased, and the blades are prevented from damaging equipment and colliding with a tower due to deformation.

Description

technical field [0001] The invention belongs to the field of horizontal-axis wind turbine equipment, and in particular relates to a variable pre-cone angle device and a use method of a wind wheel of a wind turbine. Background technique [0002] Energy is the main material basis of social economy and human life, and the driving force of social development. However, the reserves of non-renewable energy such as petroleum, coal, and natural gas, which are the main pillars of world energy, are decreasing day by day. Many countries in the world are developing wind power generation. As a new energy source, wind power generation has formed a relatively mature scale. [0003] The wind wheel is one of the most important components for absorbing wind energy. When the wind flows through the blade, the surface of the blade disturbs the flow, forming torque and thrust, and the blade deforms accordingly. When the wind speed changes, the torque changes, and the blade clearance also changes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D1/06F03D7/04
CPCF03D1/0658F03D1/0675F03D7/022F03D7/0224F03D7/042F05B2270/321Y02E10/72
Inventor 李媛蔡安民林伟荣张林伟郑磊许扬蔺雪峰
Owner HUANENG CLEAN ENERGY RES INST
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