摘要
针对MW级风力发电机组轮毂强度安全问题,使用有限元分析软件ANSYS和疲劳分析软件FE-safe,在考虑变桨轴承非线性影响情况下,采用风轮总体模型与轮毂子模型相结合以及临界平面法与最大主应力算法相结合的计算方法,对某大型风力发电机组轮毂的极限强度与疲劳强度进行了评估;为使叶片变桨时准确停留在顺桨位置,在轮毂装配系统中设计了变桨缓冲装置,并对装置组成件变桨挡块和挡块凸台在顺桨工况下的极限强度进行了分析。研究结果表明:轮毂的极限和疲劳强度以及变桨挡块和挡块凸台的极限强度均能满足设计要求,为风电机组轮毂和变桨缓冲装置的设计提供了参考依据。
Aiming at the strength safety problem of MW wind turbine hub,the ultimate and fatigue strength of a certain high level wind turbine hub were analyzed,by method of combination of the global model rotor and the sub-model hub,and integration of critical plane method and maximum principal stress algorithm,using the finite element analysis software ANSYS and the fatigue analysis software FE-safe,with consideration of the nonlinear effects of pitch bearings. A pitch cushioning device was designed in the hub assembly system to stay the blade at feathering position,and the ultimate strengths of the pitch stop and the stop notch,components of the pitch cushioning device,under feathering conditions were analyzed. The results indicate that the ultimate and fatigue strength of the hub,and the ultimate strengths of the pitch stop and the stop notch can all meet the design requirements,which provide a certain reference for the design of the hub and the pitch cushioning device.
引文
[1]甘槐樟,周鑫盛.风电场风机变桨系统故障分析[J].湖南电力,2012,32(6):35-37.
[2]孙传宗,姚兴佳,单光坤,等. MW级风力发电机轮毂强度分析[J].沈阳工业大学学报,2008,30(1):46-49.
[3] BURTON T,SHARPE D,JENKINS N. Wind energy handbook[M]. London:John Wiley&Sons Ltd.,2001.
[4]郑甲红,杜翠. MW级风力发电机轮毂有限元分析[J].制造业自动化,2010,32(9):55-56.
[5]邓良,刘平.大型风力发电机组轮毂强度数值分析[J].电气技术,2009(8):75-78.
[6]张峥,陈欣.风力机疲劳问题分析[J].华北水利水电学院学报,2008,29(3):41-43.
[7]邹磊,贾涛,宁新宇,等.低风速风力发电机轮毂强度与疲劳寿命分析[J].可再生能源,2011,29(5):28-31.
[8]张晓琳,刘衍选,栗荫帅,等.风力发电机组的轮毂强度与疲劳寿命分析[J].机械管理开发,2016,31(6):25-27.
[9]陈严,田鹏,刘雄,等.水平轴风力机轮毂强度分析方法研究[J].太阳能学报. 2010,31(7):912-916.
[10] Germanischer Lloyd. Rules and guidelines industrial services:guideline for the certification of wind turbines[M].Hamburg:Germanischer Lloyd,2010.
[11]周勃,张亚楠,王琳琳,等.基于流固耦合的风力机叶片裂纹扩展机理研究[J].流体机械,2017(8):19-23.
[12]马冬,柳彦虎,宋斌,等.基于ANSYS workbench的轮毂过盈配合疲劳优化设计[J].机械,2017(2):10-13.
[13]刘雄辉,李德源,吕文阁,等.水平轴风力机轮毂强度和疲劳寿命分析方法研究[J].太阳能学报,2012,33(5):763-767.