基于聲發(fā)射檢測的滑動軸承故障診斷方法研究.pdf

1、長沙理工大學(xué)碩士學(xué)位論文基于聲發(fā)射檢測的滑動軸承故障診斷方法研究姓名：黃琪申請學(xué)位級別：碩士專業(yè)：動力機械及工程指導(dǎo)教師：李錄平20080401ABSTRACTSlidingbearingisoneofthepivotalpartsinlargepowermachine，andithasanesSentlaJinnuenCeontheoperatingsafetyandreliabilityofthewholeunitWithtradi

2、tionalmonltonnganddiag!posismethodsofslidingbearing，therelationshipbetweenthefaulttypeandthech撒cteristicspar鋤etersCan’tbebuild，therefore，inthisdissertation，acousticemlsslonteclan0109Yisllsedtomonitorandanalyzetheoperatio

3、nsofthebearingstofindoutthequalitativeorquantitativerelationshipbetweenthebearingandoperatingconditions，鋤dtodeterminethestateofslidingbearingFirsttheAEcharaCteristicsandmechanismofslidingbearingsinrotatingmachineryares_t

4、udied矗omthetheoryperspective，anditcallbefoundthattheenergyofacoustlcemissionsi耐smainlycomesfromfrictionbetweenoilandpadThus，oneoftheslidingbearingsolasimulatedrotortestbenchof300MWturbogeneratorunitservesasthecalculation

5、ex鋤pleiIl“sthesis，andthelossofpower(AEsi印alenergy)underdifferentstatusISsimplycalculatedTheresultisthatwiththetemperatureincreases，thelossdecreases，withtheIoadincreasesthe10鼴increases，andwiththeamountofthelubricatingoild

6、ecreases，thelossesincreasesByanalyzingtheAEsignalcharacteristicsofslidingbearingwaveletdecompositionaIldreconstmctionm砒odareadoptedtoobtainfrictionsignalofslidingbearingBasedonthisthecrosscorrelationanalysisandthetraditi

7、onalparametersanalysisaleusedtoanalyzethefrictionsi倒0fslid啦bearing，toestablishtherelationshipbetweenthestatusofbe鋤ngrunningandthecharacteristicsparametersofacousticemissionn們u曲theexperimentsstudyinthespottestandlaborator

8、yexperimentscondltlons，theslidingbearin鏟AEparameters，suchasenergyrates，central能quencythemax蚰啪correlationarefIoluldedtoidentifytheoperationconditionofslidingbearing，andanewp猢eter一曲ills訕ili哆degreeofenergyspectrumisalsopres

9、entedBesldestherelationshjpbetweentheacousticemissionsignalscharacteristicspararnetersandthe0pemtionconditionintheprocessofspeedingupordowntherelationshipbe眥enp眥esS0fchaIlgethe蝴觚dtheprocessoffailureisobtained；andwhat’smo

10、rethequalitatlVerelationshipbetweenthe，acousticemissionsignalscharacteristicsparametersandthe0pera：tionCo漲onisestablishedAttheend，thestandardstoidentifytheoperationcondltionandthefauJtstatusarefoundinthisdissertationKeyw