风电机组传动链动力响应特性与支撑系统影响

Dynamic response characteristics of wind turbine drivetrain and influence of support system

针对风力发电机组传动链动力学响应问题,以某兆瓦级风电机组为研究对象,建立传动链刚柔耦合的多体动力学仿真模型.分别分析机架柔性、齿轮箱弹性支撑刚度、发电机弹性支撑刚度对传动链动力响应特性(包括传动链模态、谐振与不同风况条件下的振动响应)的影响规律;通过实验室内振动测试,分别从时域和频域上验证模型的有效性.结果表明:支撑系统对振动能量主要分布在发电机壳体、齿轮箱箱体的模态影响最大,合理进行支撑系统刚度设计能够有效降低传动链共振风险.时域分析结果表明,谐振引起的零部件振动速度偏差最大达到120%;增大齿轮箱弹性支撑刚度并降低发电机弹性支撑刚度,有助于降低传动链振动水平.

To investigate the dynamic response of wind turbine drivetrain,a multi-body dynamic simulation model with rigid-flexible coupling drivetrain was established for a certain MW class wind turbine,which was taken as the research object.The influence of frame flexibility,isolator stiffness of gearbox and generator on the dynamic response characteristics of drivetrain,including the modal of drivetrain,the resonance and the dynamic response under different wind conditions,was analyzed respectively.The validity of the model was verified through in-plant vibration test in time domain and frequency domain.Results show that the modals where the vibration energy is mainly distributed in the generator shell and the gearbox housing are affected mostly by the support system.Reasonable stiffness design of the support system can effectively reduce the resonance risk of the drivetrain.The time domain analysis results show that the vibration velocity deviation of components caused by resonance can reach up to 120%.Increasing the isolator stiffness of gearbox and decreasing the isolator stiffness of generator are conducive for reducing the vibration level of drivetrain.