风电齿轮箱高速轴圆锥滚子轴承动态特性分析

Dynamic Characteristic Analysis of Conical Roller Bearings of High-speed Shafts of Wind Turbine Gearboxes

齿轮箱是风电机组故障率最高的部件之一,其中高达50%的故障停机源于高速轴轴承的过早失效。外部变风载激励和齿轮箱内部激励下,高速轴轴承动载增大,将加速高速轴轴承破坏失效。以某750kW风电齿轮箱高速轴圆锥滚子轴承为分析对象,采用ADAMS软件建立圆锥滚子轴承的多体动力学仿真分析模型,研究轴向载荷和径向载荷变化对轴承动态响应特性的影响,基于美国Spectra Quest转子实验台开展圆锥滚子轴承振动响应特性实验,掌握了圆锥滚子轴承的动态接触力与振动响应变化规律,将为风电齿轮箱高速轴圆锥滚子轴承选型与齿轮箱设计提供理论依据。

Gearbox is one of the components with the highest failure rate of wind turbines,and up to 50 % of the downtime is caused by the premature failure of high-speed shaft bearings.Under variable wind load and internal excitation of the gearbox,the dynamic load of the high speed shaft bearing is increased,which will accelerate the failure of the bearing.In this study,with the conical roller bearing of a 750 kW wind turbine gearbox as an example,its multibody dynamic model is established by using ADAMS.The effects of axial and radial loads on the dynamic characteristics of the conical roller bearing are investigated.The relationship between the dynamic loads and the dynamic contact force is established.The results may provide theoretical bases to selection of the high-speed bearings and the design of gearboxes.