Safe feathering system of wind driven power generator

Abstract

The invention discloses a safe feathering system of a wind driven power generator. The safe feathering system comprises an electricity energy feathering device and a mechanical feathering device which is installed on a wheel hub, wherein the mechanical feathering device is mainly composed of a pinion, a transmission shaft, a clockwork spring and a clockwork box; the pinion is meshed with a pitch bearing gear on the wheel hub; one end of the transmission shaft is connected with the pinion, and the other end of the transmission shaft extends into the clockwork box through a bearing; the clockwork spring is arranged in the clockwork box; the outer end of the clockwork spring is fixed on the clockwork box, and the inner end of the clockwork spring is fixed on the transmission shaft; when a blade on the pitch bearing is at the feathering state, the clockwork spring is at the free state; and when the blade on the pitch bearing is at the operation state, the clockwork spring stores energy. According to the invention, the mechanical feathering device is added on the basis of the electricity energy feathering device, thus the mechanical feathering device and the electricity energy feathering device form redundancy design, the reliability of emergent feathering is improved further, and the wind driven power generator is ensured to operate stably, reliably and safely.

Description

technical field [0001] The invention relates to a wind power generator, in particular to a safe feathering system for a wind power generator. Background technique [0002] In recent years, with the commercial operation of a large number of wind turbines, wind power technology has made unprecedented significant progress. [0003] In the process of wind power generation, blade pitch is one of the most important basic technologies, and its success is directly related to the output power of the unit and the safety of the unit operation. [0004] At present, the pitch of the blades of the wind generator is realized by an electric feathering device, which includes a pitch gear, a pitch motor, and a power supply. The pitch gear meshes with the pitch bearing gear on the hub, and the output of the pitch motor The shaft is connected with the pitch gear and used to drive the pitch gear. The power supply provides the power for the pitch motor. Under the control of the main control syst...

AI Technical Summary

Problems solved by technology

However, due to the low stability of the storage battery itself, there are often defects such as reduced charging capacity, prolonged charging time, and insufficient discharge capacity during operation, and its reliability is poor. As a result, the blades of the wind turbine cannot be feathered in an emergency and safely, which may easily cause the blades to break or the whole machine to be damaged, and the safety and reliability are still insufficient.

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