风电机组膜片联轴器平行不对中动力学特性分析

Dynamic Characteristics Analysis of Parallel Misalignment of Diaphragm Coupling in Wind Turbine

受随机风载、间歇式工作机制、基座变形等耦合因素作用,极易诱发双馈式风电机组高速端膜片联轴器早期不对中潜隐性故障,对此在不对中理论分析基础上,基于SolidWorks与Adams构建仿真模型,利用风速转换公式计算高速端模拟转速,获取不同平行不对中量下的运动响应,借助于机械转子故障模拟试验台搭建测试系统开展实验研究。仿真结果显示:频谱出现1倍频和2倍频,幅值随不对中量的增大而增大,且轴向力的倍频幅值变化明显。实验结果表明:当轴承座时域峭度在4左右,存在冲击性振动,图谱显示径向水平1倍频和2倍频幅值随着转速增加而增大,径向垂直与轴向在不对中量大于0.4mm时,1倍频随转速升高而增大;其与理论分析、仿真结果的倍频特征变化有较好的一致性。

Due to the coupling factors such as random wind load,intermittent working mechanism and base deformation,it is easy to induce the early non-neutralization and latent faults of high-speed end diaphragm coupling of doubly-fed wind turbines.Based on the theoretical analysis of misalignment,a simulation model is built based on SolidWorks and Adams,and the simulated speed of high-speed end is calculated by wind speed conversion formula to obtain the transportation under different parallel misalignment.The dynamic response of the system is tested by means of the mechanical rotor fault simulation test bench.The simulation results show that:The frequency spectrum shows that the magnitude of frequency doubling 1 and 2 increases with the increase of the misalignment,and the magnitude of frequency doubling of the axial force changes obviously.The experimental results show that:The time-domain kurtosis of the bearing seat is about 4,impulsive vibration exists.The maps show that the amplitudes of 1-fold and 2-fold frequencies increase with the increase of rotational speed.When the radial vertical and axial misalignment is greater than 0.4 mm,the 1-fold frequencies increase with the increase of rotational speed.It is in good agreement with the theoretical analysis and simulation results.