往复式活塞隔膜泵阀体运行状态的在线监测与故障诊断

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1、东北大学硕士学位论文往复式活塞隔膜泵阀体运行状态的在线监测与故障诊断姓名：李妍申请学位级别：硕士专业：机械设计及理论指导教师：韩庆大20060201东北大学硕士学位论文ABSTRACTTheon—linemonitorandfaultdiagnosisforthevalveofthereciprocatingdiaphragmpumpAbstractThereciprocatingdiaphragmpumpisoneofthemostimportantmachinesinthefieldofindustrymanufacturing，itsstateofrunningisdirectl

2、yrelatedtotheefficiencyofproducing，thusmonitoringitsrunningstateisveryimportant，inordertomakingtrendpredictionoftheMachineandmaintainingintimeandavoidingmaintaintoooftenornotenough．Moreover，astheimportantportionofthediaphragmpump，thevalve’sfaultisveryhackneyed，anditsfaultcancausebigexpensestopro

3、ducing．Therefore，theresearchworkofthisarticleisabouttheblockandleakagefaultofthevalve．italsogivesoutthediagnosisresult．Themainresearchworkanditsproductionareasfollows：1．Basedonthestructureandworkingprinciplesofthereciprocatingdiaphragmpump，AMathematicmoldoftheentryvalve’srunningregulationanddiff

4、erentialequationsoftheentryvalvearesetup，besides，Themainactuationsourcesthatcausedthevibrationofthevalveandthevalve’sinvalidationmechanismareanalyzed．Therelationoftheinneractuationsourcesandtheexteriorvibratesignalsisexpounded．Thefeasibilityofusingthevalve’ssurfacevibratesignalstodiagnosingitsfa

5、ultisdemonstrated．Atlast，thearticleemphasizedthecharacteristicofthevibratesignalsresponse．2．Beginningwiththetheoryofacousticemission，thevalveleakagefaultdiagnosiswithacousticemissiontechnologyisintroduced．TheestablishingofAEinspectionsystemisdiscussedfromthepointoftheory，thechoiceofthesensorandc

6、ollectingcardisemphasized，andthemethodofprocessingAEsignalsisassumedintheory．3．Theexteriorvibratesignalsofthevalvethatcollectedareanalyzedintheareaoftime，amplitudeandfrequency，thusthefaultcharacteristicofblockvalveIII东北大学硕士学位论丈ABSTRACTisfoundout．Theanalyzedexperimentationsignalsshowthattheamplit

7、udeareaparametersofverticaldirection，especiallyslantingdegreeandkurtosiscanbetakenasthepowerfuldiagnosisparameters；theanalyzingofpowerspectrumcandistillthecharacteristicoffaultsignaleffectively，SOitprovedintheorythatitisfeas