摘要
现有理论方法不能随着旋转机械的运行实时地调整扭振模型,且准确性较差。因此,根据轴系机头、机尾测速齿轮的实时监测数据,分析得到轴系的扭振固有频率,并将其与计算所得的扭振固有频率进行比较,得到固有频率变化与扭转刚度变化的关系方程组;求解该方程组后,在线自适应调整轴系的扭转刚度,即可得到准确的扭振固有频率。将此方法应用于汽轮发电机组,在机组运行工况改变、扭振模型误差、汽缸内蒸汽温度变化、轴系扭振固有特性发生偏移的情况下,可准确获得机组轴系扭振固有频率。提出了一种实时在线自适应调整轴系扭振模型的方法,使扭振模型反映的固有特性与旋转机械的实际情况相符。
Existing theory methods could not adjust torsional vibration model when rotating machinery running real-timely, and the accuracy of existing methods were poor. Therefore, according to the real-time monitor data of machine head and machine tail＇s measure speed gears in shafting, the torsional vibration natural frequency was gained by analyzed, and it was compared with the calculational torsional vibration natural frequency, and the relative equations between the change of natural frequency and torsional stiffness were gained. The torsional stiffness of shafting was adjusted online self-adaption after the equations were solved, and then the exact torsional vibration natural frequency was gained. This method was used for turbo generator set, the shafting＇s torsional vibration natural frequency was gained accurately, on the condition of change of unit＇s operating condition,deviation of torsional vibration model, change of inner casing＇s steam temperature, excursion of shafting＇s torsional vibration natural frequency.
出处
《汽轮机技术》
北大核心
2016年第5期370-372,376,共4页
Turbine Technology
关键词
旋转机械
汽轮发电机组
扭转振动
在线自适应调整
扭振模型
rotating machinery
turbo generator set
torsional vibration
online self-adaption
torsional vibrationmodel
