Toothed disc type wind power generation lightning arrester

Abstract

The invention relates to a toothed disc type wind power generation lightning arrester. The lightning arrester is characterized in that the lightning arrester comprises an external toothed disc and an internal toothed disc positioned in the center of the external toothed disc; the external toothed disc and the internal toothed disc are oppositely provided with sharp teeth which can achieve a pointdischarge effect toward the side of the moving gap; the center of the internal toothed disc is provided with a hole through which a main shaft of a fan passes; one toothed disc is fixed on a wheel boss of the fan and synchronously rotates along with the wheel boss, and the toothed disc fixed on the wheel boss is electrically connected with a lightning receiving needle fixed on a fan blade; and the other toothed disc is fixed at the front end of a cabin shell and directly connected with a ground wire. By the matching of the sharp teeth of the moving gap of the internal toothed disc and the external toothed disc, the lightning guided by the lightning receiving needle fixed on the fan blade forms the point discharge phenomenon in the sharp tooth structure between the internal toothed disc and the external toothed disc and is quickly and directly discharged to the ground, so that the electric generator or other units avoid lightning surge damage to the maximum extent.

Description

Technical field: [0001] The invention relates to a lightning protection component of a wind power generator, which can be installed on a wind power generator set to improve the lightning protection performance of wind power generation. Background technique: [0002] Wind energy is an inexhaustible clean energy. After several years of rapid development of wind power plants in my country, the total installed capacity has ranked first in Asia. [0003] As we all know, wind turbines should be installed in coastal, plain or hilly areas with abundant wind energy resources. The height of the wind blades can reach more than 100 meters, and the towering wind turbines are easily hit by lightning. The huge energy released by lightning will cause damage to wind turbine blades and bearings, breakdown of generator insulation, and burning of control components. Once a lightning strike occurs, it costs a lot to repair and replace damaged parts of the wind turbine, which is also the main reason wh...

AI Technical Summary

Problems solved by technology

The huge energy released by lightning will cause damage to the blades and bearings of the wind turbine, the breakdown of the generator insulation, and the burning of control components, etc.

Once a lightning strike occurs, it will cost a lot to repair and replace the damaged parts of the wind turbine, which is the main reason why wind power generation is difficult to be widely used

[0004] In the existing wind power lightning protection technology, "blade lightning protection structure without blade tip damper" and "blade lightning protection structure with blade tip damper" are mainly used. There are relatively large defects. Most of the lightning current generated when lightning strikes the blades is introduced into the tower through the low-speed main bearing, which is easy to form erosion spots on the bearing surface, resulting in poor operation of the fan. At the same time, it can cause the generator coil to be broken down, the control components to burn out, etc.

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