A wind turbine wind wheel variable pre-cone angle device and using method

Abstract

The invention provides a variable pre-cone angle device for a wind turbine wheel of a wind turbine and a method for using it, including a connecting seat, a hub, a blade root and a blade; The blade root is connected to the blade root, and the blade is connected to the blade root; there are three bosses evenly distributed on the connecting seat; the top of the boss is provided with a gear ring, and a fixing groove is opened on the inner wall of the gear ring, and the pitch bearing is installed on the gear through the fixing groove. the blade root is fixed on the pitch bearing; the blade root has a slot, and a fixing plate is installed inside the slot, and the fixing plate is connected to the motor base located outside the slot, and the motor A motor is installed on the seat; the output shaft of the motor is connected with a toothed roller, and the toothed roller meshes with the gear ring. The invention can reduce the blade cone angle when the wind speed is small, increase the sweeping area, and improve the production efficiency; when the wind speed is high or the blade deformation is large, the blade cone angle can be increased to avoid the deformation of the blade and the tower hit and damage the device.

Description

technical field [0001] The invention belongs to the field of horizontal-axis wind turbine equipment, and particularly relates to a variable pre-cone angle device for a wind wheel of a wind turbine and a method for using the same. Background technique [0002] Energy is the main material basis of social economy and human life, and is the driving force for social development. However, the reserves of non-renewable energy sources such as oil, coal, and natural gas, which are the main pillars of the world's 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. The wind flows through the blade, and the surface of the blade is disturbed to form torque and thrust, and the blade deforms accordingly. When the wind speed changes, the torque changes and the blade cle...

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

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