石家庄铁道大学毕业论文

旋转机械转子不对中故障诊断技术研究Study on Fault Diagnosis for Rotor Misalignmentof Rotating Machinery

2015 届 机械工程 学院专 业 机械设计制造及其自动化 学 号 学生姓名 邵阳鑫 指导教师 申永军

完成日期 2015年 5 月 29 日

摘要不对中故障是旋转机械最常见的故障之一，在过去20年中，国内外许多学者和工程师们对它的机理、振动特征及诊断方法进行了广泛的研究，然而，传统的不对中故障振动特征过于笼统，对实践排除不对中故障指导意义不太精确的弊端。本课题将针对角度不对中的故障做进一步更加详细的振动特征分析。在不同角度偏移的角度不对中下，研究速度和负载力等因素对振幅的影响。本课题主要研究对象是柔性转子角度不对中,利用旋转机械振动及故障模拟实验平台，采集转子振动信号，再通过Matlab软件分析轴向、径向和水平方向上的振动波形图与频谱图的特征，最终根据分析结果确定转子不对中故障的振动特征。

关键词：角度不对中；Matlab；振动特征；频谱图 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

目录 TOC \o "1-3" \h \z \u HYPERLINK \l "_Toc420606779" 第1章 绪论 PAGEREF _Toc420606779 \h 1 HYPERLINK \l "_Toc420606780" 1.1 课题研究的目的意义 PAGEREF _Toc420606780 \h 1 HYPERLINK \l "_Toc420606781" 1.2 国内外研究现状 PAGEREF _Toc420606781 \h 1 HYPERLINK \l