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1、QQ740694182大連交通大學(xué)畢業(yè)設(shè)計(jì)(論文)題目:管件內(nèi)高壓成型系統(tǒng)設(shè)計(jì)院(系):專業(yè):班級(jí):學(xué)生姓名:導(dǎo)師姓名:職稱:起止時(shí)間:專業(yè)代做數(shù)控夾具模具機(jī)械造型機(jī)電土木等理工科畢業(yè)設(shè)計(jì)另有大量畢業(yè)設(shè)計(jì)出售質(zhì)量保證價(jià)格優(yōu)惠QQ740694182IIQQ740694182摘要液壓與氣動(dòng)傳動(dòng)是研究以有壓流體(壓縮油或壓縮空氣)為能源介質(zhì),來(lái)實(shí)現(xiàn)各種機(jī)械傳動(dòng)和自動(dòng)控制的學(xué)科。近代液壓、氣壓傳動(dòng)是由19世紀(jì)崛起并蓬勃發(fā)展的石油工業(yè)推動(dòng)起來(lái)的,最早實(shí)踐成功裝置是艦艇上的炮塔轉(zhuǎn)位器,其后才在機(jī)床上應(yīng)用。在20世紀(jì)30年代初期和后期在大型自
2、動(dòng)化工業(yè)中引入液壓制動(dòng)。1940年代開(kāi)始使用拖拉機(jī)一增強(qiáng)農(nóng)機(jī)設(shè)備的機(jī)動(dòng)性和效率。在第二次世界大戰(zhàn)后,液壓技術(shù)很快轉(zhuǎn)入民用工業(yè)。在機(jī)床、工程機(jī)械、冶金機(jī)械、塑料機(jī)械。農(nóng)機(jī)機(jī)械、汽車(chē)、船舶等行業(yè)得到了大幅度的應(yīng)用和發(fā)展。隨著液壓機(jī)械自動(dòng)化程度的不斷提高,液壓、氣動(dòng)元件應(yīng)用數(shù)量急劇增加,元件小型化、系統(tǒng)集成化是必然的發(fā)展趨勢(shì)。特別是近十年來(lái),液壓和啟動(dòng)技術(shù)與傳感技術(shù)、微電子技術(shù)密切結(jié)合,出現(xiàn)了許多諸多如電液比例控制閥、數(shù)字閥、電業(yè)伺服液壓缸等機(jī)(液)電一體化元器件,使液壓技術(shù)在高壓、高速、大功率、節(jié)能高效、低噪聲、使用壽命長(zhǎng)、高度集成
3、化等方面取得了重大進(jìn)展?,F(xiàn)今采用液壓傳動(dòng)的程度已成為衡量一個(gè)國(guó)家工業(yè)水平的重要標(biāo)志。關(guān)鍵字:液壓與氣動(dòng)傳動(dòng)液壓系統(tǒng)測(cè)試技術(shù)專業(yè)代做數(shù)控夾具模具機(jī)械造型機(jī)電土木等理工科畢業(yè)設(shè)計(jì)另有大量畢業(yè)設(shè)計(jì)出售質(zhì)量保證價(jià)格優(yōu)惠QQ740694182IIABSTRACTHydraulicandpneumatictransmissionsandadisciplinethatisbasedonfluidmediumenergyofcompressivefluid(pressureoilorcompressiveair)toaccomplishmech
4、anicaltransmissionandautomaticcontrol.Recentlyhydraulicandpneumaticpressuretransmissiontechnologyhasbeendevelopedwithalargescalepetrolicindustryinthe19th,andthebarbettedisplacewasthefirstonesuccessfulusinghydraulicequipment,andthenhydraulicmachinetool.Thegreatautomot
5、iveindustryintroducedhydraulicbrakesintheearlythirtiesandhydraulictransmissionsinthelatethirties.Thetractorindustrybeganusinghydraulicin1940toincreasetheflexibilityandutilityoffarmequipment.AftertheWorldWarⅡ,thehydraulicdevelopmentturnedintocivilindustry,suchasmachin
6、etool,engineering,metallurgy,plasticmachine,farmmachine,vehicleandwatercraft.Inmorerecentyears,theroleofleadershipinhydraulicpowerapplicationhasbeentakenoverlargerbysomeofthelargeearthmovingandconstructionequipmentmanufactures.Thetotalpowerinvolvedisoftengreaterthant
7、hatrequiredineventhelargestaircraftWiththedevelopmentofhigherautomationofhydraulicmachineandincreasinguseofhydraulicandpneumaticelements,thescaledelementsandintegratedsystemwithminiaturizationisinevitable.Especiallyinrecentyearshydraulicandpneumatictransmissioniscomb
8、inedcloselywiththesensorandmicro-electronicstechnology.Ithasbeenemergingamountsofnewvalvessuchashydraulic-electricityproportionalva