摘要
扭转振动是弹性转轴在动态扭矩作用下引起的角振动。轴系的旋转运动和扭转振动具有相同的量纲,因此转角和扭角可以实现同源测量。利用旋转轴系角运动的矢量叠加原理,得出转轴各质点的线运动具有相位调制现象。提出了脉冲信号输出的广义增量编码器模型,并给出了瞬时角速度计算的扭振测量方法的一般流程。编码器的原理是通过定角度戳记转轴角运动的时间分量,相当于建立了角度和时间的离散关系,从这一角度分析并给出了该方法的扭振信号采样定理的理论适用条件和实用公式。通过仿真与实验分别对上述模型和方法的正确性和准确度进行验证,并将其封装为功能模块嵌入工程样机中,应用于国内两台1000 MW核电半速汽轮发电机组的扭振在线监测。
Torsional vibration is the angular vibration caused by the elastic rotation shaft under the action of dynamic torque.The rotational motion and torsional vibration of shafting system have the same dimension,so the rotation angle and torsional angle can be measured homologically.Using the vector superposition principle of the rotating shaft system angular motion,it is concluded that the linear motion of the mass points of the rotating shaft has a phase modulation phenomenon.The pulse signal output type generalized incremental encoder model is proposed,and the general flow of the torsional vibration measurement method for instantaneous angular velocity calculation is given.The measurement principle of the encoder is to stamp the time component of the rotating shaft angular motion in a fixed angle,which is equivalent to establish the discrete relationship between angle and time.From this point of view,the theoretical application conditions and practical formulas of the torsional vibration signal sampling theorem of this method are analyzed and given.The correctness and accuracy of the above model and method were verified by simulation and experiment,which were packaged as a functional module and embedded in an engineering prototype,and applied to the on-line torsional vibration monitoring of two 1000 MW nuclear power half speed steam turbine generator units.
作者
张玉皓
顾煜炯
马晓腾
赵鹏程
杨昆
Zhang Yuhao;Gu Yujiong;Ma Xiaoteng;Zhao Pengcheng;Yang Kun(National Thermal Power Engineering Technology Research Center,School of Energy Power and Mechanical Engineering,North China Electric Power University,Beijing 102200,China;China Huaneng Group Clean Energy Research Institute,Beijing 102209,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2020年第10期187-195,共9页
Chinese Journal of Scientific Instrument
基金
国家重点研发计划(2017YFB0603904-4)
中央高校基金青年培养项目(JB2018109)资助
关键词
旋转轴系
扭振
瞬时角速度
增量编码器
rotating shafting system
torsional vibration
instantaneous angular speed
incremental encoder
