Overload protection device for power transmission and transformation equipment of wind power farm

Abstract

The invention discloses an overload protection device for power transmission and transformation equipment of a wind power farm. The overload protection device comprises a casing, wherein a variable-pitch head is arranged at the left side of the casing. The overload protection device has the beneficial effects that when the air speed is increased, the leftmost end of a drive plate disengages from the rightmost end of a limiting plate, and a power generator stops working, so as to avoid the load condition of the power generator due to overquick rotation speed of the power generator because of overhigh air speed, and prolong the service lives of the power generator and a speed-variable gearbox; when the air speed is too high, the variable-pitch head is in contact with a sleeve cylinder cover,and is rotated relatively to the sleeve cylinder cover, so as to protect the variable-pitch head; when the air speed is reduced, the drive plate and the limiting plate are re-embedded under the resetaction of a spring, and the power generator generates power again; the right end of the limiting plate is in an arc shape with concave right side, the right end of the limiting plate is of a structure with narrow right part and wide left part, and then the drive plate can easily enter the gap of the limiting plate when the drive plate rotates.

Description

technical field [0001] The invention relates to the technical field of power transmission and transformation equipment, in particular to an overload protection device for wind farm power transmission and transformation equipment. Background technique [0002] With the increase of my country's population, energy consumption is also increasing. Electric energy is an indispensable energy for daily life and industrial production. People's demand for electric energy is increasing day by day. In order to meet the demand and not damage the environment, people Began to study wind farms. Traditional wind farms have large volumes of power transmission and transformation, and the utilization rate of wind energy is low. When a typhoon occurs, the power transmission and transformation equipment of wind farms will be burned out and cannot work normally, and the heat dissipation capacity of the equipment is also low. An important issue to test the service life of equipment. [0003] A Chine...

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Problems solved by technology

[0002] With the increase of my country's population, energy consumption is also increasing. Electric energy is an indispensable energy for daily life and industrial production. People's demand for electric energy is increasing day by day. In order to meet the demand and not damage the environment, people Began to study wind farms. Traditional wind farms have large volumes and low utilization of wind energy. When a typhoon occurs, the power transmission and transformation equipment of wind farms will be burned out and cannot work normally. The heat dissipation capacity of the equipment is also low. An important question to test the service life of equipment

[0003] A Chinese patent with the authorized announcement number CN205533017U discloses a wind power transmission and transformation equipment, which can supply power transmission and transformation in wind farms, but the device has the defect that it cannot automatically perform overload protection

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