基于振動(dòng)信號(hào)SVM的管殼式換熱器堵塞故障診斷方法研究
[Abstract]:Heat exchanger is a kind of typical chemical equipment in large petrochemical enterprise. Its typical fault is pipe scaling, blockage and leakage when serious, which will affect the heat transfer effect of heat exchanger. It even affects the safe operation of the whole chemical plant when it is serious. Therefore, it is necessary to study the condition monitoring system of heat exchanger. The traditional state monitoring system of chemical equipment generally uses wired network to transmit data. Because of the difficulty of wiring and construction, it is a difficult problem to monitor the state of chemical equipment after putting into production. Wireless sensor network (WSN) has the advantages of flexible installation, scalability and robustness, which makes it possible to solve the wiring problem of wired monitoring system. Up to now, there are many researches on fluid induced vibration principle and vibration absorption design of heat exchangers at home and abroad, less on fault monitoring systems for heat exchangers, and even less on judging fault state of circulating water heat exchangers by vibration. In this paper, the fault diagnosis of circulating water heat exchanger based on wireless vibration sensor is selected. The main research contents are as follows: (1) based on the fluid-solid coupling model of heat exchanger clogging fault, the finite element method is used to establish the fault model of different scaling degree of the straight pipe, and the vibration properties of the straight pipe under the condition of scaling fault are discussed. The influence of flow velocity and scaling degree on the vibration of straight pipe was studied. The feasibility of the model is verified by the vibration experiment of straight pipe. The vibration properties of heat exchanger fault model with different number of blocked tubes and different inlet velocities are studied by establishing a fluid-solid coupling model of heat exchanger clogging fault. The effect of flow rate and the number of blocked tubes on the vibration signal of heat exchanger is discussed. (2) the fault diagnosis method of circulating water heat exchanger based on vibration signal is studied by analyzing the vibration signal of heat exchanger in different states, combining the parameters of inlet velocity and centrifugal pump speed, etc. A time-frequency fault feature extraction method for vibration signals based on inlet velocity of heat exchanger is proposed. The database of time-frequency fault features of heat exchangers and the support vector machine classifier (MAV-SVM) based on rectifier average are established. Five classical dimensionless parameters of vibration signal of heat exchanger are studied. Support vector machine classifier (DPD-SVM) based on feature extraction of dimensionless parameters is established, and a six-dimensional DPD-SVM. based on average rectifier is further constructed. In order to improve the accuracy of DPD-SVM classifier in heat exchanger fault diagnosis, the SVM parameter optimization technology is studied. (3) the method of manually filling the plug in heat exchanger clogging test bed and field experiment is studied. The experimental model of heat exchanger with different number of blocked tubes is established, and the vibration signals of heat exchanger under various clogging fault conditions are analyzed, and the feasibility of time-frequency domain fault feature extraction method, MAV-SVM and DPD-SVM classifier is verified. By sampling and analyzing the vibration signals of three heat exchangers in different states of petrochemical production field, the feasibility of obtaining vibration signals of heat exchangers in production site and the influence of environmental noise on data acquisition are studied. The separability of the DPD-SVM method for vibration signals in different states is verified. (4) the state monitoring system of heat exchangers based on vibration signals is studied using LabVIEW and Matlab mixed programming technology. The signal analysis system of heat exchanger based on wireline vibration sensor and wireless vibration sensor is developed to realize the analysis of vibration signal in time domain frequency domain and dimensionless parameter. A real-time monitoring fault diagnosis and alarm system based on laboratory heat exchanger model is developed based on the fault characteristic database of heat exchanger and DPD-SVM classifier.
【學(xué)位授予單位】:華南理工大學(xué)
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2016
【分類號(hào)】:TQ051.5
【相似文獻(xiàn)】
相關(guān)期刊論文 前10條
1 劉月芹;淺談?chuàng)Q熱器的分類和特點(diǎn)[J];化工設(shè)計(jì)通訊;2003年03期
2 馬萬順;換熱器管束使用中存在問題的探討[J];石油化工設(shè)備技術(shù);2004年04期
3 李虹戈;劉傳廣;;內(nèi)展翅片換熱器[J];油氣田地面工程;2006年11期
4 楊鋒平;趙新偉;羅金恒;張廣利;苗健;王珂;;換熱器管束完整性評(píng)價(jià)技術(shù)研究及應(yīng)用現(xiàn)狀[J];壓力容器;2012年03期
5 束潤(rùn)濤;三種特殊抗腐蝕材料換熱器簡(jiǎn)介[J];煉油設(shè)計(jì);1997年06期
6 丁平安,常六喜;常頂換熱器管束損壞原因分析及對(duì)策[J];石油化工腐蝕與防護(hù);2000年01期
7 丁網(wǎng)英,肖佐華;煉油廠換熱器故障淺析[J];石油化工腐蝕與防護(hù);2001年03期
8 王世明,劉元,張錳;常頂換熱器損壞成因分析及應(yīng)對(duì)措施[J];內(nèi)蒙古石油化工;2002年02期
9 王觀東;換熱器的快速修復(fù)[J];石油化工設(shè)備;2004年06期
10 賴永星,劉敏珊,董其伍;靜止外部流體對(duì)換熱器管束動(dòng)特性的影響分析[J];壓力容器;2004年12期
相關(guān)會(huì)議論文 前10條
1 張輝君;呂勝杰;;換熱器管束翻新再造[A];全國(guó)第四屆換熱器學(xué)術(shù)會(huì)議論文集[C];2011年
2 施哲雄;薛利杰;王祖悅;;換熱器的風(fēng)險(xiǎn)檢測(cè)技術(shù)研究[A];壓力容器先進(jìn)技術(shù)——第七屆全國(guó)壓力容器學(xué)術(shù)會(huì)議論文集[C];2009年
3 周華盛;王亞;呂青燦;;U型換熱器管束通用試壓工裝的研制[A];第十五次全國(guó)焊接學(xué)術(shù)會(huì)議論文集[C];2010年
4 林洪亞;;換熱器管束失效分析與防范[A];第三屆全國(guó)化學(xué)工程與生物化工年會(huì)論文摘要集(下)[C];2006年
5 金廣敏;楊貴冬;;外購(gòu)換熱器制造檢驗(yàn)中的幾個(gè)問題[A];第八屆全國(guó)設(shè)備與維修工程學(xué)術(shù)會(huì)議、第十三屆全國(guó)設(shè)備監(jiān)測(cè)與診斷學(xué)術(shù)會(huì)議論文集[C];2008年
6 趙敏;康強(qiáng)利;崔軻龍;孔朝輝;徐奕;;蒸餾裝置常頂換熱器失效分析[A];石油和化工設(shè)備管道防腐技術(shù)與對(duì)策專題研討會(huì)文集[C];2010年
7 張宇;劉常鵬;張勁松;付國(guó)利;;煤氣換熱器損壞原因分析及解決方案[A];2010全國(guó)能源與熱工學(xué)術(shù)年會(huì)論文集[C];2010年
8 陳孫藝;;銅材換熱器管束的制造技術(shù)[A];中國(guó)機(jī)械工程學(xué)會(huì)壓力容器制造委員會(huì)2011年年會(huì)暨技術(shù)交流會(huì)論文集[C];2011年
9 王正方;;灰色決策在常減壓塔頂換熱器改造中的應(yīng)用[A];全國(guó)第四屆換熱器學(xué)術(shù)會(huì)議論文集[C];2011年
10 任紅亮;吳力俊;;換熱器管束的防腐蝕[A];全國(guó)第四屆換熱器學(xué)術(shù)會(huì)議論文集[C];2011年
相關(guān)博士學(xué)位論文 前7條
1 黃劍鋒;基于振動(dòng)信號(hào)SVM的管殼式換熱器堵塞故障診斷方法研究[D];華南理工大學(xué);2016年
2 李靜;新型異徑布管夾持結(jié)構(gòu)換熱器的研究與開發(fā)[D];鄭州大學(xué);2006年
3 焦鳳;換熱器復(fù)雜流道中的強(qiáng)化傳熱研究[D];華南理工大學(xué);2013年
4 王英雙;縱流管殼式換熱器流動(dòng)與傳熱性能的理論與實(shí)驗(yàn)研究[D];華中科技大學(xué);2011年
5 劉天豐;非對(duì)稱管殼式換熱器結(jié)構(gòu)分析及改進(jìn)中的問題研究[D];浙江大學(xué);2005年
6 孫愛芳;導(dǎo)熱復(fù)合材料緊湊型板殼式換熱器關(guān)鍵技術(shù)研究[D];鄭州大學(xué);2007年
7 馬永其;換熱器固定管板有限元應(yīng)力分析的進(jìn)一步研究[D];北京化工大學(xué);2000年
相關(guān)碩士學(xué)位論文 前10條
1 任峰志;沖壓發(fā)動(dòng)機(jī)中燃料/空氣換熱器設(shè)計(jì)方法研究[D];哈爾濱工業(yè)大學(xué);2015年
2 王蕊;基于熱流固耦合的換熱器管束數(shù)值模擬分析[D];大連理工大學(xué);2015年
3 高克;套筒石灰窯換熱器管束堵塞后快速檢修技術(shù)研究[D];安徽理工大學(xué);2016年
4 徐澤輝;大型羥胺反應(yīng)冷卻器關(guān)鍵技術(shù)設(shè)計(jì)研究[D];華東理工大學(xué);2016年
5 陳磊磊;多晶硅生產(chǎn)中典型換熱器防腐技術(shù)研究[D];青海大學(xué);2016年
6 于洋;自支撐型高效扭曲管換熱器傳熱與流動(dòng)阻力性能研究及應(yīng)用[D];華東理工大學(xué);2011年
7 陳占秀;縱流式換熱器流動(dòng)與傳熱特性的研究[D];天津大學(xué);2004年
8 滕海洋;換熱器管束失效分析方法與應(yīng)用研究[D];東北石油大學(xué);2012年
9 吳玲;112E/G換熱器應(yīng)力分析與強(qiáng)度評(píng)價(jià)[D];大慶石油學(xué)院;2008年
10 劉勝利;旋轉(zhuǎn)超聲檢測(cè)儀在管道與換熱器管束檢測(cè)中的應(yīng)用研究[D];天津大學(xué);2009年
,本文編號(hào):2272093
本文鏈接:http://sikaile.net/kejilunwen/huaxuehuagong/2272093.html