Overload protectors for wind turbines

Abstract

An overload protector for a wind driven generator comprises a torque sensor (2), an electromagnetic clutch (31), a transmission mechanism (32) and a torque converter (4). The torque sensor (2) is mounted on an impeller (1), the torque sensor (2) and the electromagnetic clutch (31) are connected with a programmable control circuit to form a loop, a power generation driving shaft (6), in linkage with a booster engine (5), on the impeller (1) can be in linkage with the transmission mechanism (32) through the electromagnetic clutch (31), and the transmission mechanism (32) drives a turbine in the torque converter (4) to rotate so as to realize energy distribution. Owing to the structure, overload caused by changeful wind speed is absorbed by the hydraulic torque converter, 'fatigue loading' of the booster engine is avoided, and accordingly normality in operation of the generator is guaranteed while service life of the booster engine is prolonged. When the wind speed returns to normal, the torque sensor sends an 'off' signal, the electromagnetic clutch is separated from a hydraulic mechanical device, and the generator continues to operate normally, so that operating life of the wind driven generator is greatly prolonged.

Description

technical field [0001] The invention relates to electrical equipment, in particular to a fast-sensing overload protector for wind power generators. Background technique [0002] The wind turbine has a yaw function, and the blades have a pitch function. This function is to keep the speed of the blades within a certain range as much as possible, so as to ensure the normal operation and power generation of the speed reducer. However, the functions of yaw and pitch change can only guarantee the adjustment within a certain time range. The variable wind speed will appear at any time, and the yaw and pitch change are relatively lagging behind. As a result, the speed increaser often encounters variable overload situations, especially It is the impact load, and the high contact stress exceeds the fatigue limit load of the material, which will cause bearing damage and gear "broken teeth". The applicant proposed a utility model patent to the State Intellectual Property Office in July ...

AI Technical Summary

Problems solved by technology

However, the functions of yaw and pitch change can only guarantee the adjustment within a certain time range. The variable wind speed will appear at any time, and the yaw and pitch change are relatively lagging behind. As a result, the speed increaser often encounters variable overload situations, especially It is an impact load, and the high contact stress exceeds the fatigue limit load of the material, which will cause bearing damage and gear "broken teeth" and other phenomena

The applicant proposed a utility model patent to the State Intellectual Property Office in July 2009. The patent number is 200920233743.8 and the title is "Overload Protection Device for Speed ​​Increaser of Wind Power Generator". However, the disadvantage is that the automatic adjustment is not ideal. For this reason, the applicant made a revolutionary improvement on the basis of the original patent after years of hard work, and achieved a very ideal application effect.

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