發(fā)布時(shí)間：2018-05-03 14:20

  本文選題：汽輪機(jī)轉(zhuǎn)子 + ANSYS軟件��； 參考：《長沙理工大學(xué)》2014年碩士論文

【摘要】：受國家節(jié)能減排政策的影響,關(guān)停小機(jī)組、新建大機(jī)組已成為電力行業(yè)發(fā)展的必然趨勢(shì),這將造成電網(wǎng)峰谷差的矛盾日益突出。為了穩(wěn)定電網(wǎng)的運(yùn)行,越來越多的火電機(jī)組將承擔(dān)調(diào)峰任務(wù)。為了保證機(jī)組的安全運(yùn)行,提高火電機(jī)組的調(diào)峰性能,對(duì)汽輪機(jī)轉(zhuǎn)子的壽命損耗進(jìn)行在線監(jiān)測就顯得尤為重要。以大唐托克托電廠1號(hào)汽輪機(jī)轉(zhuǎn)子為研究對(duì)象。介紹了有限元法的溫度場和熱應(yīng)力場的數(shù)學(xué)模型,在此基礎(chǔ)上建立轉(zhuǎn)子的數(shù)學(xué)計(jì)算模型。用ANSYS軟件對(duì)汽輪機(jī)的冷態(tài)啟動(dòng)、溫態(tài)啟動(dòng)、熱態(tài)啟動(dòng)以及滑參數(shù)停機(jī)四個(gè)過程中的溫度場和熱應(yīng)力場進(jìn)行瞬間熱分析,確定轉(zhuǎn)子的最大應(yīng)力點(diǎn),作為監(jiān)測部位,并對(duì)監(jiān)測部位的溫度與熱應(yīng)力進(jìn)行仿真計(jì)算。研究了材料的疲勞損傷與蠕變損傷,擬合出收集到的本機(jī)組相關(guān)的現(xiàn)場運(yùn)行參數(shù)之間的邏輯關(guān)系。通過計(jì)算,得到轉(zhuǎn)子運(yùn)行時(shí)產(chǎn)生的疲勞損耗與蠕變損耗的數(shù)值,兩者之和就是轉(zhuǎn)子的總壽命損耗。最后,根據(jù)分析與計(jì)算的結(jié)果,選擇了適用性廣的LabVIEW軟件開發(fā)轉(zhuǎn)子壽命損耗在線監(jiān)測系統(tǒng),詳細(xì)介紹了該系統(tǒng)。該系統(tǒng)具有數(shù)據(jù)采集、數(shù)據(jù)分析、數(shù)據(jù)在線處理、歷史數(shù)據(jù)查詢、溫差與熱應(yīng)力報(bào)警等功能,能為機(jī)組的優(yōu)化運(yùn)行提供有效參考。
[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.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM621

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 王琳;楊小飛;盛步云;;基于LabVIEW的汽輪機(jī)轉(zhuǎn)子溫度監(jiān)測系統(tǒng)[J];熱力發(fā)電;2009年10期

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本文編號(hào)：1838851