齿轮箱油对发电机影响研究及应用

Research and Application of Gearbox Oil s Influence on Generator

中速永磁风力发电机组的发电机与齿轮箱高度集成,共用高速轴和端盖。若端盖密封失效会导致油液、油雾进入发电机内部。由于端盖密封的寿命未经过长期老化验证,因此亟需研究油液、油雾对发电机绕组绝缘和防腐等功能的影响。然而,齿轮箱漏油程度等环境工况无法量化,故在研究过程中通过常规试验项目提高试验严苛等级,提出了“高温长时油膜+高温长时浸油”的发电机绝缘及防腐耐油测试方法,完成了发电机绝缘的系统级防腐体系的油雾耐受性试验,为发电机的可靠性设计提供了重要依据。

The generator and gearbox of the medium-speed permanent magnet wind turbine are highly integrated,sharing the high-speed shaft and end cover.If the seal of the end cover fails,oil and oil mist will enter the generator.Since the life of the end cover seal has not been verified by long-term aging,it is urgent to study the influence of oil and oil mist on the insulation and anti-corrosion of the generator winding.However,the environmental conditions such as the amount of oil leakage of the gearbox cannot be quantified.Therefore,in the process of research,conventional test items were used to improve the test severity level,and the generator insulation and anti-corrosion oil resistance test method of“high temperature and long time oil film+high temperature and long time oil immersion”was proposed.The oil mist resistance test of the system-level anti-corrosion system of the generator insulation was completed,which provided an important basis for the reliability design of the generator.