节能组合油缸液压升降系统研究

《节能组合油缸液压升降系统研究》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、机床与液压Sep．2014HydromechatronicsEngineeringVoI．42No．18DOI：10．3969／j．issn．1001-3881．2014．18．012Studyonenergy·savingcompositecylinderhydraulicliftingsystemLu-junZHANG．Zhi-jiangLIN。SchoolofElectromechanicalAutomobileEngineering，YantaiUniversity，Yantai264005，China；。KeyLaboratoryofAdva

2、ncedManufacturingandControlTechnologyinUniversitiesofShandong，Yantai264005，China；WendengAgriculturalMachineryServiceStation，Wendeng264400，ChinaAbstract：Theconstructionmachines，suchasthecrane，hydraulicgrabandetc．，utilizethehy·draulicliftingsystem．Theconventionalhydraulicliftingsy

3、stemusuallycannotrecoverthepoten—tialenergyoftheheavyobject．Inordertoavoidtheobjectfallingtoofast，athrottlevalveissetintheoilcircuittoIimitthefallingvelocityoftheobject．Therefore．thepotentialenergywillbeconveaedintothethermalenergy，whichnotonlybringstheenergylossandalsocouldcaus

4、esomethermalproblems．Inordertoavoidthelossofenergy，anenergy-savingcompositecylin-derhydraulicliftingsystemisdesigned．Thispaperpresentsthebasicstructureandworkingtheo-ryofthisnewhydraulicliftingsystem．Byutilizingcompositecylinderwithspecialstructurecom-binedwithaccumulator．thissy

5、stemcanIimittheloweringvelocityofheavyobjectandalsocouldrecoverthepotentialenergyoftheobjectbeinglowered．Thus，thissystemhasremarkableefectofenergy—saving．Theparametersoftheaccumulatorusedinthissystemaredetermined．Themathematicalmodelofliftingconditionisproposed，andthesimulationa

6、nalysisofliftingconditionisconductedaswel1．Keywords：Compositecylinder，Accumulator，Energy-saving，Hydraulicliftingsystem，PotentialenergYrecoverywillbereleased．Theconventionalhydrauliclifting1．Introductionsystemcannotrecoverthiskindofpotentialenergy．Inordertoavoidtheobjectfallingto

7、ofast，athrottleLotsofengineeringconstructionmachines，suchvalveisusuallyadoptedintheoilcircuittolimittheasthecrane，hydraulicgrab，hydraulicelevatorandfallingvelocity．Therefore，thepotentialenergywillhydraulicpumpingunits，havethehydraulicliftingbeconvertedintothethermalenergy，whichw

8、illnotsystem[1-4]．Thehydraulicliftingsystemlift