风电齿轮箱油温高原因分析及解决方法

针对某1.5 MW风电齿轮箱普遍存在油温高的问题,通过对齿轮箱润滑油冷却系统进行理论计算,分析与对比同机型不同风电场热交换器的实际冷却效果,分析与研究同台机组不同运行状态下的实际冷却效果,认为引起该风电齿轮箱润滑油温度高的因素有:翅片结构选型不适、机舱密封不严等因素引起的翅片堵塞问题,润滑油设计流量偏低的问题,以及温控阀失效、油温传感器失效、发电机水冷缺水等元件问题。在排除元件问题的基础上,通过改变散热器翅片结构,增加热交换器换热面积和增加换热器冷却风扇流量等方法,彻底解决了齿轮箱油温高问题。工程实际应用表明,该方法可在该系列齿轮箱油温高技术改造上推广使用,同时也可为后续产品技术升级提供参考依据。

CAUSE ANALYSIS AND SOLVING MEASURES OF HIGH OIL TEMPERATURE IN A SERIES OF WIND TURBINE GEARBOXES

Aiming at the high oil temperature problem in one 1.5 MW wind turbine gearbox,through calculating theoretically the heat transfer in the lubricating oil heat exchanger of the gearbox,the actual cooling effect in different wind farm heat exchangers of the same model and in the same unit under different operating conditions is analyzed and compared in this paper. It can be found that the factors causing lubricating oil high temperature may be as follows: the inappropriateness of the fin structure selection,the lack of improper sealing of the nacelle,low design flow rate of lubricating oil,temperature control valve or oil temperature sensor becoming invalid and generator cooling water lack,etc.Therefore,on the basis of excluding the component problem,the problem of high oil temperature is completely solved by changing the structure of the radiator fin,increasing the heat exchanger area and the flow rate of the cooling fan in heat exchanger. The practical application of the project shows that the method proposed in this paper can be used to solve the problem of high oil temperature for this series of gearboxes,and also provides reference for the technical upgrade of subsequent products.