本文選題：冷卻塔風(fēng)機(jī) + 故障診斷��； 參考：《天津科技大學(xué)》2012年碩士論文

【摘要】：冷卻塔風(fēng)機(jī)是利用空氣冷卻水的裝置,是石油、化工、電力、冶金等多種行業(yè)循環(huán)水系統(tǒng)中的關(guān)鍵設(shè)備之一,其主要作用是將熱的工業(yè)用水強(qiáng)迫冷卻。因此為保證冷卻塔風(fēng)機(jī)的冷卻效果,研究冷卻塔風(fēng)機(jī)運(yùn)行狀態(tài)監(jiān)測和故障診斷方法具有重要現(xiàn)實(shí)意義。 本課題研究的主要目的是通過對(duì)冷卻塔風(fēng)機(jī)故障機(jī)理和監(jiān)測方法進(jìn)行研究,針對(duì)容易造成重大安全事故的傳動(dòng)軸和葉片斷裂甩出這兩種故障,提出一種安全可靠、成本較低、適用于冷卻塔風(fēng)機(jī)的監(jiān)測方法,并以中石化天津分公司的冷卻塔風(fēng)機(jī)為實(shí)驗(yàn)研究對(duì)象,設(shè)計(jì)出基于單片機(jī)和基于PLC的兩種冷卻塔風(fēng)機(jī)故障監(jiān)測系統(tǒng)。生產(chǎn)實(shí)踐證明,本監(jiān)測方法提高了冷卻塔風(fēng)機(jī)故障監(jiān)測的可靠性,具有良好的推廣應(yīng)用價(jià)值。 本課題的主要研究成果包括： (1)深入研究冷卻塔風(fēng)機(jī)的結(jié)構(gòu)特點(diǎn)及風(fēng)機(jī)的變頻調(diào)速原理和方法,并對(duì)冷卻塔風(fēng)機(jī)可能出現(xiàn)的各種故障類型進(jìn)行詳細(xì)分析,通過斷口分析,找出冷卻塔風(fēng)機(jī)傳動(dòng)軸、葉片斷裂機(jī)理和原因。 (2)在對(duì)現(xiàn)有故障診斷方法進(jìn)行研究的基礎(chǔ)上,根據(jù)傳動(dòng)軸和葉片的故障機(jī)理,提出一種新型傳動(dòng)軸和葉片故障監(jiān)測方法——聯(lián)軸器位移監(jiān)測法和葉尖計(jì)時(shí)監(jiān)測法。 (3)研究采用單片機(jī)作為控制核心的冷卻塔風(fēng)機(jī)故障監(jiān)測系統(tǒng)的實(shí)現(xiàn)方法。利用單片機(jī)的定時(shí)、中斷功能分析處理脈沖信號(hào),設(shè)計(jì)了風(fēng)機(jī)葉片故障監(jiān)測系統(tǒng)與傳動(dòng)軸故障監(jiān)測系統(tǒng),實(shí)現(xiàn)在葉片、傳動(dòng)軸發(fā)生斷裂或嚴(yán)重變形時(shí)風(fēng)機(jī)可以報(bào)警停機(jī)。 (4)設(shè)計(jì)基于WinCC組態(tài)軟件及西門子S7-200可編程控制器的冷卻塔風(fēng)機(jī)故障監(jiān)測系統(tǒng),實(shí)現(xiàn)以冷卻塔風(fēng)機(jī)葉片、傳動(dòng)軸、減速箱油溫等為監(jiān)測對(duì)象的監(jiān)測系統(tǒng)設(shè)計(jì)。
[Abstract]:Cooling tower fan is one of the key equipments in circulating water system of petroleum, chemical, electric power, metallurgy and other industries. Its main function is to force the cooling of hot industrial water. Therefore, in order to ensure the cooling effect of cooling tower fan, it is of great practical significance to study the monitoring and fault diagnosis method of cooling tower fan. The main purpose of this paper is to study the fault mechanism and monitoring method of cooling tower fan. Aiming at the breakage of transmission shaft and blade which is easy to cause serious safety accidents, this paper puts forward a kind of safety and reliability with low cost. This paper applies to the monitoring method of cooling tower fan, and takes the cooling tower fan of Sinopec Tianjin Branch as the experimental research object, designs two kinds of cooling tower fan fault monitoring system based on single chip computer and PLC. The production practice proves that this monitoring method improves the reliability of fan fault monitoring of cooling tower and has a good value of popularization and application. The main research results of this topic include: 1) deeply study the structure characteristics of cooling tower fan and the principle and method of variable frequency speed regulation of fan, and analyze in detail various kinds of faults that may occur in cooling tower fan, and find out the driving shaft of cooling tower fan through fracture analysis. The mechanism and cause of blade fracture. 2) based on the research of the existing fault diagnosis methods and according to the fault mechanism of the transmission shaft and blade, a new fault monitoring method of the drive shaft and blade is proposed, namely, the coupling displacement monitoring method and the blade tip timing monitoring method. The realization method of fan fault monitoring system of cooling tower using single chip microcomputer as control core is studied. Based on the timing and interrupt function of single chip microcomputer, the fault monitoring system of fan blade and the fault monitoring system of drive shaft are designed. The system can alarm and shut down when the blade or shaft is broken or seriously deformed. Based on WinCC configuration software and Siemens S7-200 Programmable Logic Controller, the fault monitoring system of cooling tower fan is designed. The monitoring system is designed with cooling tower fan blade, transmission shaft, decelerator oil temperature and so on.
【學(xué)位授予單位】：天津科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH165.3;TP274

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