大型风力发电机组变桨距机构分析与实验研究

Pitch-regulated mechanism analysis and experiment of large wind turbine

旨在确定变桨距机构的结构形式,通过精炼设计校核变桨距机构的技术参数,论证变桨距机构的合理性,确保兆瓦级风力发电机组在60 m高空稳定工作.通过不同的变桨距机构方案的对比,找出各种变桨距机构的优缺点,完成兆瓦级风力发电机组变桨距结构的确定;利用数值算法进行变桨距机构参数的精炼设计;利用实验装置验证变桨距机构的合理性.最终,兆瓦级风力发电机组采用了液压变桨距结构形式,由数值算法给出了液压变桨距结构的最大负载力矩;并利用实验装置验证完成了在地面上的变桨距机构的调试工作,证明了变桨距机构在额定工况下能正常工作.在兆瓦级风力发电机组的调试过程中变桨距机构工作正常、稳定,达到了预期设计的目标.

The research is to determine the pitch-regulated mechanism of a large wind turbine, check the technical parameters of pitch-regulated mechanism by refine design, and demonstrate the rationality of pitch-regulated mechanism, which will ensure the stable operation of the wind turbine on the tower of 60 meters. The different pitch-regulated mechanisms were compared to determine their advantages and shortcomings and select the best mechanism. The refine design for the technical parameters of pitchregulated mechanism was done by numerical analysis method. The rationality of pitch-regulated mechanism was demonstrated by experiments. At last, a hydraulic pitch-regulated mechanism was selected for the megawatt wind turbine. The maximum load moment of pitch-regulated mechanism was given by numerical analysis method, and the regulation and＇ test on the ground were carried out. The pitch-regulated mechanism operates normally under rated condition and the desired results have been achieved.