石家莊鐵道大學(xué)畢業(yè)論文

旋轉(zhuǎn)機(jī)械轉(zhuǎn)子不對中故障診斷技術(shù)研究Study on Fault Diagnosis for Rotor Misalignmentof Rotating Machinery

2015 屆 機(jī)械工程 學(xué)院專 業(yè) 機(jī)械設(shè)計制造及其自動化 學(xué) 號 學(xué)生姓名 邵陽鑫 指導(dǎo)教師 申永軍

完成日期 2015年 5 月 29 日

摘要不對中故障是旋轉(zhuǎn)機(jī)械最常見的故障之一，在過去20年中，國內(nèi)外許多學(xué)者和工程師們對它的機(jī)理、振動特征及診斷方法進(jìn)行了廣泛的研究，然而，傳統(tǒng)的不對中故障振動特征過于籠統(tǒng)，對實(shí)踐排除不對中故障指導(dǎo)意義不太精確的弊端。本課題將針對角度不對中的故障做進(jìn)一步更加詳細(xì)的振動特征分析。在不同角度偏移的角度不對中下，研究速度和負(fù)載力等因素對振幅的影響。本課題主要研究對象是柔性轉(zhuǎn)子角度不對中,利用旋轉(zhuǎn)機(jī)械振動及故障模擬實(shí)驗平臺，采集轉(zhuǎn)子振動信號，再通過Matlab軟件分析軸向、徑向和水平方向上的振動波形圖與頻譜圖的特征，最終根據(jù)分析結(jié)果確定轉(zhuǎn)子不對中故障的振動特征。

關(guān)鍵詞：角度不對中；Matlab；振動特征；頻譜圖 AbstractThe problem of misalignment is one of the most common failures of rotating machinery. In last 20 years, many scholars and engineers both here and abroad have carried out extensive research on the mechanism, vibration characteristics and diagnostic method of faults. However, the traditional fault vibration characteristics of the fault are too general, the fault guidance is not too clear in the practical rule. This paper will make further efforts to analyze the vibration feature of the angle misalignment. Under different angles of offset, the influence of the speed and the load is studied. The main research object of this paper is rotor angle misalignment experiment. The experimental data of the rotor misalignment is acquired by using the rotating machinery vibration and fault simulation experiment platform. Then through the Matlab software, the vibration waveforms and spectrum of the axial, radial and horizontal directions are analyzed, and the vibration characteristics of the faults are determined according to the results of the analysis.

Key words: angle misalignment; Matlab; vibration characteristics; spectrum

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