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1、2014年1月機(jī)床與液壓Jan.2014第42卷第1期MACHINETOOL&HYDRAULICSVo1.42No.1DOI:10.3969/j.issn.1001—3881.2014.O1.001有壓管道波動(dòng)激振特性試驗(yàn)研究吳娟,陸春月,寇子明,張慧賢'(1.太原理工大學(xué)機(jī)械工程學(xué)院,山西太原030024;2.山西省礦山流體控制工程中心,山西太原030024;3.中北大學(xué)機(jī)械工程與自動(dòng)化學(xué)院,山西太原030051)摘要:針對(duì)現(xiàn)有液壓振動(dòng)技術(shù)的應(yīng)用現(xiàn)狀以及液壓系統(tǒng)中存在的液壓沖擊現(xiàn)象,提出一種利用液壓沖擊來產(chǎn)生振動(dòng)的激振系統(tǒng)。該系統(tǒng)以激波器為波動(dòng)發(fā)生器,以管道為受控對(duì)象。闡述液壓波動(dòng)發(fā)
2、生的機(jī)制,并搭建振動(dòng)試驗(yàn)測(cè)試平臺(tái)。對(duì)管道中的壓力波動(dòng)進(jìn)行研究,計(jì)算壓力脈動(dòng)的最大理論值,并進(jìn)行試驗(yàn)驗(yàn)證,結(jié)果表明:兩者吻合較好,管道中的壓力波動(dòng)受控于系統(tǒng)頻率。對(duì)管道振動(dòng)特性的試驗(yàn)表明:管道兩端的振動(dòng)強(qiáng)度大于中間的振動(dòng)強(qiáng)度;管道的振幅隨系統(tǒng)頻率與系統(tǒng)壓力的增大而增大;系統(tǒng)壓力在4.6MPa以上,再增大系統(tǒng)壓力,對(duì)管道振幅的影響不大。關(guān)鍵詞:液壓沖擊;壓力波動(dòng);管道振動(dòng);激波器中圖分類號(hào):TB123:O351.2文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1001—3881(2014)1—001—3ExperimentalStudyonFluctuationExcitingCharacteristicsof
3、PressurePipelineWUJuanI1,LUChunyuel1,KOUZiming,ZHANGHuixianl’(1.CollegeofMechanicalEngineering,TaiyuanUniversityofTechnology,TaiyuanShanxi030024,China;2.ShanxiProvinceMineFluidControlEngineeringResearchCenter,TaiyuanShanxi030024,China;3.CollegeofMechanicalEngineeringAutomation,NorthUniversityofC
4、hina,TaiyuanShanxi030051,China)Abstract:Aimingatthepresentapplicationsituationofthehydraulicvibrationtechnologyaswellasthephenomenonofthehy—draulicimpactinthehydraulicsystem,avibrationsystemusingthehydraulicimpacttogeneratevibrationwasputforward.Inthesys—tem,awaveexciterwasusedasthewavegenerator
5、andthepipelinewasusedasacontrolledobject.Themechanismofhydraulicfluc—tuationwasexpounded,andthevibrationexperimentalplatformwassetup.Thefluctuationsofpressureinsidethepipelinewerere-searched,themaximumtheoreticalvalueofthepressurepulsationwascalculated,andthenthevaluewasverifiedbyexperiments.The
6、resultsshowthatthetheoreticalvalueisingooda~eementwiththeexperimentaloneandthepressurefluctuationsinsidethepipelinearecontrolledbythesystemfrequency.Theexperimentofvibrationcharacteristicsofthepipelineshowsthatvibrationstrengthofpipeline’Sbothendsisgreaterthantheoneofmiddle,theamplitudeofthepipe
7、lineisincreasedwiththeincreasingofsystemfrequencyandsystempressure.Anditwillhavelittleeffectontheamplitudeofthepipelineifthesystempressureisincreasedabove4.6MPa.Keywords:Hydraulicimpact;Pressurefluctuation;Pipelinevibration;