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时间:2020-04-02
《节能组合油缸液压升降系统研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、机床与液压Sep.2014HydromechatronicsEngineeringVol.42No.18DOI:10.3969/j.issn.1001-3881.2014.18.012Studyonenergy-savingcompositecylinderhydrauliclifting*system1,23Lu-junZHANG,Zhi-jiangLIN1SchoolofElectromechanicalAutomobileEngineering,Ya
2、ntaiUniversity,Yantai264005,China;2KeyLaboratoryofAdvancedManufacturingandControlTechnologyinUniversitiesofShandong,Yantai264005,China;3WendengAgriculturalMachineryServiceStation,Wendeng264400,ChinaAbstract:Theconstructionmachines,suchasthecrane,hydraulicgrabandetc.,utilizethe
3、hy-draulicliftingsystem.Theconventionalhydraulicliftingsystemusuallycannotrecoverthepoten-tialenergyoftheheavyobject.Inordertoavoidtheobjectfallingtoofast,athrottlevalveissetintheoilcircuittolimitthefallingvelocityoftheobject.Therefore,thepotentialenergywillbeconvertedintothet
4、hermalenergy,whichnotonlybringstheenergylossandalsocouldcausesomethermalproblems.Inordertoavoidthelossofenergy,anenergy-savingcompositecylin-derhydraulicliftingsystemisdesigned.Thispaperpresentsthebasicstructureandworkingtheo-ryofthisnewhydraulicliftingsystem.Byutilizingcompos
5、itecylinderwithspecialstructurecom-binedwithaccumulator,thissystemcanlimittheloweringvelocityofheavyobjectandalsocouldrecoverthepotentialenergyoftheobjectbeinglowered.Thus,thissystemhasremarkableeffectofenergy-saving.Theparametersoftheaccumulatorusedinthissystemaredetermined.T
6、hemathematicalmodelofliftingconditionisproposed,andthesimulationanalysisofliftingconditionisconductedaswell.Keywords:Compositecylinder,Accumulator,Energy-saving,Hydraulicliftingsystem,Potentialenergyrecoverywillbereleased.Theconventionalhydrauliclifting1.Introductionsystemcann
7、otrecoverthiskindofpotentialenergy.Inordertoavoidtheobjectfallingtoofast,athrottleLotsofengineeringconstructionmachines,suchvalveisusuallyadoptedintheoilcircuittolimittheasthecrane,hydraulicgrab,hydraulicelevatorandfallingvelocity.Therefore,thepotentialenergywillhydraulicpumpi
8、ngunits,havethehydraulicliftingbeconvertedintothethermalenerg
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