Wind power generator set and yawing-braking magnetic thixotropic flexible braking device of wind power generator set

Abstract

The invention discloses a wind power generator set and a yawing-braking magnetic thixotropic flexible braking device of the wind power generator set. The braking device comprises an outer ring, an inner ring, a magnetic yoke, a coil winding, a braking wheel and a magnetic thixotropic adhesive, wherein the outer ring and the inner ring are connected with each other through the magnetic yoke and can be fixed on a tower flange of the wind power generator set; the braking wheel comprises a fixed part and a braking part and can be fixed on a cabin seat; the outer ring and the inner ring are connected to form a braking slot for accommodating the braking part of the braking wheel and a coil winding slot for accommodating the coil winding; the braking part of the braking wheel is arranged in the braking slot in a rotatable manner, and a clearance is formed between the braking part and each of the inner ring and the outer ring; and the magnetic thixotropic adhesive is accommodated in the clearances. According to the braking device, abrasion and spot corrosion of wheel teeth of a yawing driving system are effectively reduced, the braking noise and the vibration during yawing braking are reduced, the service life of a gear box is effectively prolonged, and the running cost of a fan is reduced.

Description

technical field [0001] The invention relates to wind power equipment, in particular to a flexible braking device for a yaw braking system of a wind turbine. Background technique [0002] For horizontal axis wind turbines, the yaw braking device of the wind turbine is an important part for the wind turbine's impeller to face the wind accurately, improve the wind energy capture rate and operate safely. The yaw system of the wind turbine mainly includes yaw motor, yaw reducer, yaw bearing, yaw counter, yaw brake and hydraulic circuit, especially the yaw brake, because the braking performance of the yaw brake directly affects the performance of the wind turbine. The yaw braking system of wind turbines has always been one of the core technologies of wind turbines for key parameters such as machine vibration and safety life. [0003] During the yaw process, the wind turbine mainly realizes the following three functions: facing the wind, damping yaw motion and locking. The purpos...

AI Technical Summary

Problems solved by technology

This kind of braking device can achieve the functions of yaw and locking of the unit by uniformly distributing the brakes on the circumference, but due to the discrete arrangement of the brakes and the rigid contact between the brakes and the friction discs, during the yaw braking process The problems of uneven force on the friction disc and unstable braking torque are unavoidable. When the frictional braking force on the rigid contact surface is too large, it is easy to cause the brake block to crawl on the friction disc, resulting in severe vibration of the tower. Vibration, this kind of rigid braking is likely to cause increased mechanical friction noise, pitting and wear on the tooth surface of the yaw bearing and the gear teeth of the drive reducer

The high-pressure hydraulic system provided for locking is easy to cause problems such as leakage and pipeline failure, which requires high sealing performance of the system and high technical cost

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