兆瓦级风力发电机组传动系统动态特性研究  

Dynamic characteristics of a MW class wind turbine drive system

作　　者：罗勇水 周民强 陈棋 崔峰 刘伟江 

机构地区：[1]浙江运达风电股份有限公司,风力发电系统国家重点实验室,杭州310012

出　　处：《振动与冲击》2015年第21期113-118,共6页Journal of Vibration and Shock

摘　　要：基于集中参数质量法建立风力发电机组四质量块柔性传动模型,在综合考虑外部风载、齿轮副啮合刚度、啮合阻尼和综合啮合误差激励条件下建立齿轮箱内部各级齿轮副动力学方程。以1.5MW风力发电机组为计算对象,计算柔性传动系统固有频率和齿轮箱各级齿轮动态啮合力,通过雨流计数法对齿轮动态啮合力进行统计分析,结果显示动态啮合力具有很强的时变特性,此研究方法为齿轮和轴承设计、寿命预估建模提供依据。并对传动系统稳定性进行分析,结果显示传动系统一阶扭振频率与风轮面内一阶摆振频率偏差为7.5%,通过降低主轴重量约8.5%,提高了传动系统一阶扭转频率值5%,提高后的频率值与风轮面内一阶摆阵频率偏差达11.9%,大于规范推荐值10%,为风力发电机组传动系统设计和可靠性研究提供参考。Based on the lumped parameter mass standard,a 4-mass wind turbine flexible drive system model was established.Considering external wind load,gear mesh stiffness,mesh damping and meshing error excitation,its gearbox dynamic equations were built.A 1.5 MW wind turbine was taken as a calculation object,the natural frequencies of the flexible drive system and the dynamic meshing forces of the gearbox＇s gear pairs were computed.The statistical analysis was mad for the gear dynamic meshing forces with the rain flow count method.The results showed that the dynamic meshing forces have strong time-varying characteristics,the proposed method provides a guide for gear and bearing design, and their life forecast modeling.The stability of the flexible drive system was also analysed,the results showed that the deviation between the first order torsional vibration frequency of the drive system and the first order shimmy frequency of the wind turbine rotor is 7.5%,through reducing the weight of the main shaft about 8.5%,the first order torsional vibration frequency of the drive system increases 5%,then the deviation mentioned above is 11.9%,it is 10% larger than the specification value recommended.All results provided a theoretical foundation for wind turbine drive system design and its reliability study.

关 键 词：风力发电 柔性传动系统 动态特性 动力学方程 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]