Wind turbine blades, wind turbine cooling devices and wind turbines

Abstract

The invention provides a wind power generator blade, a wind power generator cooling device and a wind power generator unit. The wind power generator blade comprises a blade root and a blade body, and further comprises air inlets, air outlets, blade air channels and backflow prevention devices, wherein the air inlets are formed in the blade root; the air outlets are formed in the outer surface of the blade body; the blade air channels are formed in the blade and enable the air inlets and the air outlets to communicate; and the backflow prevention devices are arranged at the air outlets. According to the wind power generator blade, the blade air channels are arranged in the blade, the air outlets are formed in the outer surface, and accordingly air at the air inlets can be guided to the air outlets through the blade air channels and then discharged. Through the pressure difference generated by the blade during rotating, moving airflow from a cabin to the air outlets of the blade is formed, and then heat in the cabin is dissipated.

Description

technical field [0001] The invention relates to the field of wind power generators, in particular to a wind power generator blade, a wind power generator cooling device and a wind power generator set. Background technique [0002] Generator heat dissipation is the main and important part of wind turbine heat dissipation. Its structure and efficiency determine the capacity, structure, and performance of wind turbine generators. At this stage, high-power (greater than 2MW) permanent magnet direct drive generators are often used for heat dissipation. Although the structure of the active air cooling method is different, the cost, equipment used, and space occupied are roughly the same, and the heat dissipation efficiency varies greatly according to the heat dissipation requirements. [0003] For example: in a heat dissipation device for a wind power generator, the heat dissipation process is to use the exhaust fan to make the hot air in the generator convectively exchange heat w...

AI Technical Summary

Problems solved by technology

[0007] 1. It is necessary to add a motor and a motor control device to drive the air circulation movement, which increases the cost and energy consumption of the wind turbine, and leads to an increase in the weight of the wind turbine;

[0008] 2. Whether it is heat dissipation by heat convection or heat conduction, the heat dissipation range is limited to the nacelle and its surroundings, and cannot effectively dissipate heat from other wind turbine equipment such as converters and main control switch cabinets;

[0009] 3. The cooling device has relatively high requirements on the reliability of the motor. Once the motor of the cooling device fails, it will seriously affect the heat dissipation effect of the wind turbine, which will cause the wind turbine to not work normally, thereby reducing the stability and stability of the wind turbine. reliability

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