大唐托克托电厂1号汽轮机转子寿命损耗在线监测系统的研究

发布时间：2018-05-03 14:20

本文选题：汽轮机转子 + ANSYS软件　；参考：《长沙理工大学》2014年硕士论文

【摘要】：受国家节能减排政策的影响,关停小机组、新建大机组已成为电力行业发展的必然趋势,这将造成电网峰谷差的矛盾日益突出。为了稳定电网的运行,越来越多的火电机组将承担调峰任务。为了保证机组的安全运行,提高火电机组的调峰性能,对汽轮机转子的寿命损耗进行在线监测就显得尤为重要。以大唐托克托电厂1号汽轮机转子为研究对象。介绍了有限元法的温度场和热应力场的数学模型,在此基础上建立转子的数学计算模型。用ANSYS软件对汽轮机的冷态启动、温态启动、热态启动以及滑参数停机四个过程中的温度场和热应力场进行瞬间热分析,确定转子的最大应力点,作为监测部位,并对监测部位的温度与热应力进行仿真计算。研究了材料的疲劳损伤与蠕变损伤,拟合出收集到的本机组相关的现场运行参数之间的逻辑关系。通过计算,得到转子运行时产生的疲劳损耗与蠕变损耗的数值,两者之和就是转子的总寿命损耗。最后,根据分析与计算的结果,选择了适用性广的LabVIEW软件开发转子寿命损耗在线监测系统,详细介绍了该系统。该系统具有数据采集、数据分析、数据在线处理、历史数据查询、温差与热应力报警等功能,能为机组的优化运行提供有效参考。
[Abstract]:Under the influence of the national policy of energy saving and emission reduction, shutting down small units and building new large units has become an inevitable trend in the development of power industry, which will cause the contradiction of peak and valley difference in power grid to become increasingly prominent. In order to stabilize the operation of the power grid, more and more thermal power units will take the task of peak-shaving. In order to ensure the safe operation of the unit and improve the peak-shaving performance of the thermal power unit, it is particularly important to monitor the life loss of the turbine rotor on line. The rotor of No. 1 steam turbine in Datang toketo Power Plant is taken as the research object. The mathematical models of the temperature field and the thermal stress field of the finite element method are introduced, and the mathematical model of the rotor is established. The temperature field and thermal stress field of steam turbine during cold start, warm start, hot start and slip parameter shutdown are analyzed by ANSYS software, and the maximum stress point of rotor is determined as the monitoring position. The temperature and thermal stress of monitoring site are simulated and calculated. The fatigue damage and creep damage of the material are studied, and the logical relationship between the relevant field operation parameters of the unit is fitted out. By calculation, the values of fatigue loss and creep loss are obtained, and the sum of them is the total life loss of rotor. Finally, according to the results of analysis and calculation, the on-line monitoring system of rotor life loss is developed with LabVIEW software, and the system is introduced in detail. The system has the functions of data acquisition, data analysis, online data processing, historical data query, temperature difference and thermal stress alarm, and can provide an effective reference for the optimal operation of the unit.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM621

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