A grounding ring structure of a wind power generator rotor

Abstract

The invention discloses a grounding ring structure of a wind power generator rotor. The grounding ring structure of the wind power generator rotor comprises a main shaft (1), a grounding ring (2) and a ground carbon brush (3). A connection portion of a major diameter section (5) and a minor diameter section (6) of the main shaft (1) forms a step end surface (7). The grounding ring (2) sleeves on the external portion of the minor diameter section (6). The grounding ring (2) is connected to the step end surface (7) of the major diameter section (5) through a connection bolt (10). The ground carbon brush (3) fixedly installed on an outer cover (4) of a bearing is in contact with grounding ring (2). The beneficial effects of grounding ring structure of the wind power generator rotor of the present invention are that: the ground carbon brush is in direct contact with the grounding ring, and a portion, which is in contact with the ground carbon brush, of the main shaft is separated from the main shaft, so that when maintenance or replacing are needed, only the grounding ring needs to be dismounted. Convenience and rapidness are provided. The maintenance period is shortened. The maintenance cost is reduced. The reliability and safety degree of the operation of a generator are raised. The grounding ring structure of the wind power generator rotor is very convenient and effective.

Description

technical field [0001] The invention relates to the technical field of wind power generator grounding devices, in particular to a wind power generator rotor grounding ring structure. Background technique [0002] Doubly-fed asynchronous wind generator is the mainstream type of wind power generation, the safety of the unit is very important, and the reliability of the protective grounding of each part of the motor is particularly important. Due to the uneven distribution of the internal magnetic field of the wind turbine, a shaft voltage will be induced on the main shaft. When the human body touches the rotor, the shaft current generated by the shaft voltage will flow into the ground through the human body, causing great harm to the human body. If the shaft current passes through the bearing, it will cause electrical corrosion to the bearing and damage the bearing. In order to avoid the harm caused by the shaft voltage, it is necessary to install a grounding carbon brush on ...

AI Technical Summary

Problems solved by technology

[0003] The traditional grounding carbon brush is directly in contact with the main shaft, the long-term operation of the generator (20 years design life) the carbon brush will wear the main shaft to a certain extent, and the surface that the main shaft needs to contact is exposed to the air and will be rusted, which will affect the grounding of the product Reliability, only to remove the generator rotor to maintain it, very inconvenient

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