Wind power generation device capable of changing pitch angles

Abstract

The invention discloses a wind power generation device capable of changing pitch angles. The wind power generation device is aimed at automatically adjusting the pitch angles of blades in the wind power generation device according to different wind speeds so as to work safely under a strong wind power level condition. Damping paddles are movably arranged on damping paddle supporting plates through pin shafts, the damping paddle supporting plates are fixedly arranged at the left end of a central shaft through first nuts and connecting keys, spring plate supporting seats are fixedly arranged on the central shaft, one ends of the spring plates are fixedly connected on the spring plate supporting seats, and the other ends of the spring plates are provided with annular sleeves; and the left ends of bolt pin shafts are installed in the annular sleeves of the spring plates, the right ends of the bolt pin shafts are fixedly connected on flow guide cover supporting seats, sliding bearings are fixedly arranged on sliding bearing U-shaped supporting seats, flange shafts are fixedly arranged on the sliding bearing U-shaped supporting seats through the sliding bearings, and the blades are fixedly connected on the flange shafts through bolts. According to the wind power generation device, the pitch angles of the blades are adjustable.

Description

technical field [0001] The invention relates to a wind power generating device, in particular to a variable pitch angle wind power generating device. Background technique [0002] As a clean and renewable energy, wind energy has been paid more and more attention by countries all over the world. Its reserves are huge, and the global wind energy is about 2.74×10 9 MW, of which the available wind energy is 2×10 7 MW is 10 times larger than the total amount of water energy that can be developed and utilized on the earth. At present, the energy obtained by burning coal in the world every year is only one-third of the energy provided by wind power in a year. Moreover, wind power generation has no fuel problem, nor does it produce radiation or air pollution, and it is a particularly good way of generating electricity. Therefore, both at home and abroad attach great importance to the use of wind power to generate electricity, and wind power generation is mainly realized by wind ...

AI Technical Summary

Problems solved by technology

At present, the brake device of the common variable pitch wind turbine is expensive, difficult to maintain, the control circuit is complicated, and it also consumes a certain amount of electric energy. The pitch angle of the blades is automatically adjusted by the change of the wind speed. The wind speed is unstable. Under the action of strong winds, the blades will turn faster and faster. If there is no limit, the system may be blown down, and the wind power generation device cannot work normally.

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