Bearing protection method and device for wind driven generator

Abstract

The invention discloses a bearing protection method for a wind driven generator. A bearing is arranged between a stator spindle of the wind driven generator and a rotor shaft of a generator rotor, and the stator spindle, the bearing and the rotor shaft form a shaft system of the wind driven generator; a heat source is arranged at the position corresponding to the bearing in the radial direction of the shaft system. The bearing protection method comprises the steps that when the wind driven generator is continuously stopped for a preset time and the environmental temperature is within a preset temperature range, the heat source is started to build a temperature field in the radial direction of the shaft system, the temperature of the temperature field is sequentially increased from the rotor shaft and the bearing to the stator spindle, and through control over the temperature field, lubricating grease of the bearing reaches the set fluidized temperature; the wind driven generator is started. According to the method, bearing wear caused due to the fact that the wind driven generator is started at once when wind comes at a low-temperature environment can be reduced, and the bearing failure rate can be decreased. In addition, the invention further provides a bearing protection device for the wind driven generator.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a bearing protection method and device for a wind power generator. Background technique [0002] The impeller of the wind generator drives the rotor shaft of the connected generator rotor to rotate, and the stator main shaft of the generator is connected to the base of the tower. Rolling bearings are arranged between the rotor shaft and the stator main shaft of the generator rotor to meet the requirements of load transmission and support the relative movement between the stator and rotor to achieve the purpose of electric energy conversion. [0003] Bearings are very important components in the energy transfer system of the entire wind turbine. Due to the impact of variable loads and strong gusts all year round, bearings are also one of the weakest links in wind turbines. [0004] In practical applications, it is found that in winter or in high and low temperature ...

AI Technical Summary

Problems solved by technology

[0004] In practical applications, it is found that in winter or in high and low temperature regions, the bearings of wind turbines are prone to failure due to wear

[0005] The life of the bearing is related to the life of the entire generator. Once the bearing fails, it cannot be replaced in the air. Therefore, once the bearing fails, the replacement cost is huge

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