兆瓦级风机偏航系统低速抖动运动学特性  

Characteristics of low jitter kinematic for megawatt wind power yaw system

作　　者：李晓光[1,2] 赵萍[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1期89-94,共6页Journal of Central South University:Science and Technology

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

摘　　要：针对兆瓦级风机偏航动作时低速抖动问题,采用机理建模的方法建立兆瓦级风机偏航系统低速抖动运动学特性模型并对其进行相应求解。研究结果表明:扭转刚度、偏航驱动转速、动静摩擦因数差、系统阻尼比和正压力是导致偏航系统产生低速抖动现象的主要因素,而较高的偏航系统刚度、不小于临界速度的合适驱动转速、合理的范围动静摩擦因数之差、较大的系统阻尼比、较小的安全预紧力矩等有利于消除兆瓦级风机偏航系统低速抖动现象。Aimed at the low jitter phenomenon for yaw motion, a novel low jitter kinematic model of yaw system in the megawatt wind power was put forward by using the method of mechanism modeling, and its corresponding solutions were gotten. The results show that some factors such as torsional stiffness, yaw drive speed, friction coefficient difference, damping ratio and pressure are the major leading causes of low jitter for yaw system in the megawatt wind power. And it is conducive to the elimination of low jitter phenomenon, and yaw motion is caused by some factors such as the higher stiffness, suitable driving speed which is not less than the critical velocity, reasonable friction coefficient difference, higher damping ratio and smaller tightening,

关 键 词：兆瓦级风力发电机组 滑动轴承 运动学特性 摩擦 低速抖动现象 

分 类 号：TH138.51[机械工程—机械制造及自动化]