大型立式水泵机组可靠性的研究

《大型立式水泵机组可靠性的研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、ClassifiedIndex：U．D．C．：M．D．DissertationStudyonReliabilityofLargeVerticalPumpUnitsMajor：FluidMachineryandEngineering一Adviser：Prof．HuangHaitianProf．QiuBaoyunGraduateStudent：HuangGenYangzhouUniversityMay，2012黄根：火型立式水泵机组可靠性研究I大型立式水泵机组在国内最早采薏应用翥广泛。1一口工况调节大型立式水泵机组

2、在国内最早采用，应用最为广泛。1、≈Z纠j靠性和工况调节AbstractLargeverticalpumpunitsarefirstlyandwildlyusedinChinabecauseofbestreliability，performanceofregulatingworkingconditionandmaturetechnology．Largepumpunitsareclassifiedintofourtypesaccordingtotheaxisform：verticaltype，obliquetyp

3、e，horizontaltypeandtubulartype．Theshaftofverticalpumpisperpendiculartothehorizontalplane，characterizedbylowloadforguidebearing，goodoperatingenvironmentfornecessaryelectromotor，easyinstallationandmaintenance．Thereare14pumpingstationsand62setsofpumpunitstobebu

4、iltinJiangsuProvinceinthefirstphaseprojectsofEasternRouteofSouth-to-NorthWaterTransferwhereverticalpumpunitsaccountfor64．5％ofthetotalnumber．Therefore，itissignificanttostudythereliabilityofverticalpumpunitsandensurethenormalopermionofWaterTransferProject．Thec

5、ommonfailuresoflargeverticalpumpunitsweresummarized；mainreasonsoffailureswereanalyzed．Theformulasoftheleakageanddisplacementofmechanicalendfacesealofoillubricatedguidebeatingofverticalpump，theweal"rateofwaterlubricatedpolyurethaneguidebearing，failureprobabil

6、ityofbladeadjustingmechanism，andtheweal"rateofthrustbearingwereestablishedbyconsideringthemaininfluencefactorsofthereliabilityoflargeverticalpumpunitsthatemphaticallystudyingontheinfluencefactorsofkeycomponentssuchasguidebeating，thrustbearing，andbladeadjusti

7、ngmechanism．Thewearlifeofwaterlubricatedpolyurethaneguidebeatingbasedonreliability；theservicelifeofbladeadjustingmechanismbasedonreliabilityandthewearlifeofthrustbeatingbasedonreliabilitywerecalculatedaccordingtodevicereliabilitytheoryofmultipleinfluencefact

8、ors．Themeasurestoimprovethereliabilityofverticalpumpunitswereputforwardatlast．Thecommonfaultsandfailuremodesoflargeverticalpumpunitsincludewaterleakageintheoillubricatedguidebearing．wearfailureo