Pneumatic variable pitch brake system of wind power generator

Abstract

The invention relates to a pneumatic variable pitch brake system of a wind power generator. Fan blades are rotatablely installed on a wheel hub of the wind power generator by a fan blade shaft, the wheel hub is connected with a rotor shaft, one side of the rotor shaft is provided with a disc type brake, the pneumatic variable pitch brake system is arranged at the front end of the wheel hub, and comprises a synchronous disc drive mechanism, a synchronous disc and a variable pitch connecting tumbler connected with the synchronous disc, and the variable pitch connecting tumbler is connected with the fan blade shaft of the fan blades, to drive fan blade variable pitch to be braked. The pneumatic variable pitch brake system is quick in reaction and is suitable for severe environments, is hardly influenced by environment, can be used in moist, dusty, vibratory and over-cold and over-hot environments, furthermore, a drive mechanism is simple in drive, and direct in driving force, so that the failure rate is greatly reduced, and power generation security of the wind power generator is guaranteed. When the pneumatic variable pitch brake system is aerated, the wind power generator normally works, and when the pneumatic variable pitch brake system is deflated, the wind power generator is braked or the variable pitch is performed, so that the wind power generator can be controlled without the sudden interruption or deflation, the variable pitch brake system can be manfully controlled or automatically controlled by a programmable logic controller (PLC), and the manual control is matched with the automatic control, and therefore, the wind power generator is safe and stable to work.

Description

technical field [0001] The invention relates to a wind blade speed control device of a wind generator, in particular to an aerodynamic pitch control system capable of controlling the wind blades of the wind generator to adjust or brake in an emergency according to the wind direction and wind force. Background technique [0002] With the continuous development of the economy, people's demand for energy is increasing, and the reserves of non-renewable resources are seriously threatened. Therefore, people gradually turn their attention to renewable resources. As a clean and renewable energy, wind energy is becoming more and more important. The more and more countries in the world pay attention to it, which promotes the continuous innovation of wind turbines. The most important part of wind turbines is the wind blades that are directly in contact with wind energy and provide power for the generators. In order to better adapt to various wind directions, ensure The safety and serv...

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of the economy, people's demand for energy is increasing, and the reserves of non-renewable resources are seriously threatened. Therefore, people gradually turn their attention to renewable resources. As a clean and renewable energy, wind energy is becoming more and more important. The more and more countries in the world pay attention to it, which promotes the continuous innovation of wind turbines. The most important part of wind turbines is the wind blades that are directly in contact with wind energy and provide power for the generators. In order to better adapt to various wind directions, ensure The safety and service life of wind turbines. Most of the existing wind turbines control the blades through the hydraulic system. The hydraulic control system is easily affected by temperature and is not suitable for overcooling or overheating environments, and the service life is low. There are frequent failures such as oil leakage, which cannot guarantee the safety of wind turbines

The patent number is: 201020249951.X, and the patent name is: The invention patent of the wind turbine aerodynamic pitch braking system introduces a braking system that uses aerodynamic pitch to control the wind turbine, solving the problem of hydraulic braking. However, the above-mentioned patents have the disadvantages of complex transmission mechanism and long transmission distance

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