Variable-pitch structure of wind turbine

Abstract

The invention relates to the technical field of wind turbines, in particular to a variable-pitch structure of a wind turbine. The variable-pitch structure of the wind turbine comprises a fan main shaft, a rotating shell, a sealing cover plate and fan blades, wherein the rotating shell is fixedly installed at the end of the fan main shaft; the fan main shaft is positioned at the middle position ofthe rotating shell; three groups of holes are formed in the outer wall of the interior of the rotating shell; and variable-pitch rotating rods are inserted into the interiors of the holes. According to the variable-pitch structure of the wind turbine, first conical gears and a second conical gear are arranged, and the second conical gear can drive the three first conical gears to rotate synchronously by controlling the rotation of a transmission motor in the process of pitch change, so that the rotation of the three first conical gears is completed only by controlling one transmission motor torotate, the variable-pitch imbalance of the blades caused by the damage of one transmission motor is effectively avoided, the situation that the blades are damaged is further reduced, meanwhile, theoperation is simple, and the follow-up maintenance and the use are convenient.

Description

technical field [0001] The invention relates to the technical field of wind turbines, in particular to a pitch structure of a wind turbine. Background technique [0002] As one of the core parts of the large-scale wind turbine control system, the pitch control system plays a very important role in the safe, stable and efficient operation of the unit. In simple terms, the pitch control technology is to change the airflow by adjusting the pitch angle of the blades. The angle of attack of the blades, and then control the aerodynamic torque and aerodynamic power captured by the wind wheel. During the grid connection process, the pitch control can also realize fast grid connection without impact. When emergency shutdown, the pitch mechanism adjusts the propeller The blade pitch angle is 90°, so that the blades are reversed, the speed of the wind rotor is reduced, the impact on the load of the wind turbine is reduced, the life of the system is improved, and the use is more conveni...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a wind turbine pitch structure to solve the problem that the angles of the pitch are easy to be different during the process of pitching proposed in the above-mentioned background technology, so that the rotation is likely to be unbalanced during use. , the problem that causes the failure to occur

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