滚动轴承和齿轮故障诊断和检测毕业论文

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1、摘要滚动轴承和齿轮是煤矿机电设备机械系统中最基本的元件，其出现故障的概率很高，一旦滚动轴承和齿轮出现故障就会造成巨大的经济损失，因此必须对其进行监测和诊断。目前的故障诊断方法大都以振动理论为基础，振动信号处理技术是设备故障诊断中最有效、最常用的方法。本文介绍了故障诊断的目的、意义、国内外研究现状、目前常用的故障诊断方法、Matlab小波工具箱、引起滚动轴承及齿轮故障的主要原因等。对小波分析法的理论部分进行了深入研究，并利用Matlab小波工具箱对滚动轴承及齿轮的故障信号进行小波分解。通过对分解所得细节信号的分析，可以准确判断出发生故障的部位及时间。结果表明，小

2、波分析法可以在早期发现故障及其产生原因，减少维修时间，提高维修质量，节约维修费用，是一种行之有效的故障诊断方法。关键词：故障诊断；小波分析；Matlab仿真FailurediagnosisofelectromechanicaldeviceincoalmineAbstract:Theconditionbearingandgearrunisrelatetotheperformancewhichmechanicalsystemrun，theprobabilityitappearsthebreakdownisveryhigh．Oncethebearingandtheg

3、earappearthebreakdown，cancausethemechanicalsystemtobeunableworknormally．Itwillcreatethehugeeconomicloss．Thepresentmethodoffaultdiagnosismostlybasesonthevibrationtheoryandthesignalprocessingtechnologybasingonvibrationisthemosteffectiveandthemostcommonlyusedmethod.Themainsignificanceo

4、ffaultdiagnosisofequipmentisstateoftheimplementationofplannedmaintenance，makeearlywarningofthedevelopmentofequipmentfailure.Identificateandevaluateofthereasons，locationanddegreeofriskidentificationofthefault.Forecastthedevelopmenttrendofthefault.Forecastthedevelopmenttrendofthefault

5、andquicklyfindfaultsource.Putforwardcountermeasuresandsuggestions.Andrapidtothespecificcircumstancestomakeresponsetroubleshooting，toavoidorreduceaccident，andensurethesmoothprogressofproduction。Thispapertalksaboutthepurposeoffaultdiagnosis，thesignificance，Researchathomeandabroad，Thec

6、urrentcommonlyusedmethodoffaultdiagnosis，Matlabwavelettoolbox，themainreasonsofthefaultofrollingbearingandgear，andsoon.Theresearchofthetheoreticalpartofwaveletanalysisiscarriedoutin-depth。.AndusingMatlabwavelettoolboxmakeasimulationoffaultdiagnoseofrollingbearingandgear。Theresultssho

7、wthat，waveletanalysiscanfindthereasonsforthefaultatanearlystage，reducemaintenancetime，improvethequalityofmaintenanceandsavemaintenancecost，itisaneffectivemethodoffaultdiagnosis.Keywords:FaultDiagnosis；WaveletAnalysis；Matlabsimulation目录1绪论11.1选题的目的和意义11.2国内外研究现状简述21.3设备故障诊断技术的发展趋势31.

8、4论文的主要研究内容及章节安排42目前