主动偏航过程兆瓦级风机偏航系统失稳振动特性  

Characteristics of unstable vibration for megawatt wind power yaw system in process of active yaw

作　　者：李晓光[1,2] 赵萍[2] 韩德海[2] 

机构地区：[1]中南大学机电工程学院,湖南长沙410083 [2]南车株洲电力机车研究所有限公司,湖南株洲412001

出　　处：《中南大学学报（自然科学版）》2013年第3期949-954,共6页Journal of Central South University:Science and Technology

基　　金：国家高技术研究发展计划("863"计划)项目(2008AA05Z410)

摘　　要：根据兆瓦级风机偏航系统主动偏航原理,建立兆瓦级风机偏航系统振动模型,并在引入摩擦失稳阻尼比的基础上对主动偏航过程兆瓦级风机偏航系统摩擦失稳进行仿真研究和实验验证。研究结果表明:过大的预紧力矩和过大的静摩擦因数是导致偏航系统产生失稳振动现象的主要因素,而较合理的静摩擦因数和预紧力矩可有效避免主动偏航过程兆瓦级风机偏航系统摩擦失稳现象发生。According to the active yaw theory of a megawatt-class draught fan,a vibration model of the yaw system of megawatt-class draught fan was built and simulation analysis and experiments on the yaw system friction instability generating in the course of active yaw were conducted based on the damping ratio of friction instability.The results show that over preloaded torque and static friction coefficient mainly cause the instability vibration phenomenon of the yaw system,and a reasonable value of preloaded torque and static friction coefficient can avoid the phenomenon effectively occurring in the active yaw course.

关 键 词：兆瓦级风力发电机组 主动偏航 运动学特性 摩擦 失稳振动 

分 类 号：TH138.51[机械工程—机械制造及自动化]