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河南科技大学硕士学位论文东方红-4LZ3.5型谷物联合收割机液压系统的研发姓名：周天悦申请学位级别：硕士专业：动力机械及工程指导教师：徐斌;贾鸿社20050101I-4LZ3.5MatlabPro/EngineerIIDevelopmentofHydraulicSystemofDongFangHong-4LZ3.5combineABSTRACTInthehydraulicsystemoftraditionalDongfanghongseriescombine,therearemoretroubles,suchashighoiltemperature,whistlinginthevalveandvibrationintheoilpipeetc.Additionally,someactuator,forexample,cylinderofheader,reelandwalkingvelocityadjustorisnoteasetobehandledthroughhydraulicvalveduetolackofthrottlevalveinthehydrauliccircuitwhencombineareworking.Thispaperistoresolvetheseproblemsinhydraulicsystemofcombine.Basedonthetheoriesofhydraulictransmissionandcontrol,redesignationwillbedoneonthehydraulicsystemcircuitanditscomponents,correspondingparameterswillbeadaptedtothenewhydraulicsystem,static,dynamicanalysisandstableanalysiswillbeproceededtoguranteethathydraulicsystemanditscomponenthaveahighqualityofcharacteristics.Withthetheoryoffiniteelementanalysis(FEA),stiffnessofthereliefvalvebodywhichisconsideredtobeweakcomparablyinthehydraulicsystemwillbecheckedtopromisereliabilityinthesystem.Somemethodwillbeusedtodothesejobs.Matlab,asoftware,willbeusedtoconductstatic,dynamicanalysisandstableanalysisofhydraulicsystemwithclassicalcontroltheory.CheckoutthestiffnessonreliefvalvebodywiththetheoryoffiniteelementanalysiswillbecarriedoutbyanothersoftwarePro/Engineer.KEYWORDSHydraulictransmission,Hydrauliccontrol,Stability,IIIDynamiccharacteristic,Frequencyresponse,FEA111§1.1-4LZ3.5-4LZ3.5-4LZ3.52§1.2-4LZ3.513-4LZ3.5§1.3MatlabPro/EngineerAutoCAD200242-4LZ3.5§2.1-4LZ3.5-4LZ3.512-4LZ3.5§2.232-4LZ3.55-4LZ3.5aMP8~6,§2.3[12]....62-1Fig.2-1Cycloid-styledhydraulicsteering(2-1)2-4LZ3.578aMP162-4LZ3.59§2.4[1]2-2Fig.2-2Structurediagramofuni-routepriorityvalve2-2aqVPPAaBPbcePcpc=pp10vdAxxkpp)(0+=−(2-1):pPdpdvAk0xxaBVBqvadaVBAxxkdcppdcq)(24)(24022+=−=ρπρπ(2-2):cada2-2kxox(p-pd)PBBdpd(p-pd)qBdpdAAPp(p-pd)BBB-d§2.52-4LZ3.511-4LZ3.5-4LZ3.516MPa-4LZ3.56~7MPa-4LZ3.5123-4LZ3.5§3.1.-4LZ3.5LR4105ZT57N=95n=2400r/min,D=170mmBZZ-20020L/min16MPaFLD-15Qd=15L/min12.5MPa.CBF-E532q=32ml/r2500r/min600r/min3000r/min16MPa20MPa=93%d=270mmmin/15112701702400rdDnnp=×=×=PQ;=××=ηqnQpP1511r/min32ml/r93%10-3=44.97L/min=45L/minOQsmLLLQQQdPO/105min/30min/15min/4534−×==−=−=.mmdp12=mmdo16=smdQvpOp/42.4)1012(4110541234=×××==−−ππ3-4LZ3.513smdQvoOo/91.1)1016(4110541234=×××==−−ππpvov63pv5.25.1ov.YD50A16MPa,s=400mm50φ=d700KgNF10000max=aMPdFP1.5)1050(411000041232max=××==−ππsmdQvO/1275.0)1050(4121054122342=××××=×=−−ππsvst136.31275.0104003=×==−aMPP1.5max=arMPP16=smQO/10534−×=st136.3=t5s.YD25A16MPa,s=240mm25φ=d50KgNF500max=aMPdFP02.1)1025(415004123maxmax=××==−ππ14aMPP02.1max=arMPP16=min/30/10534LsmQO=×=−smdQvO/51.0)1025(412105412234=××××=×=−−ππsvst47.051.0102403=×==−st2=smtsv/12.02102403=×==−Qmin/1.7/1018.1)1025(4112.0241234232LsmdvQ=×=×××=××=−−ππMK6MK6min/1.7/1018.134LsmQ=×=−min/9.22min/1.7min/30LLLQQQOy=−=−=.YS40F16MPa,s=65mmmmd40=mmd22=NF1600max=aMPdFP27.1)1040(41160041232maxmax=××==−ππaMPP27.1max=arMPP16=3-4LZ3.515min/30/10534LsmQO=×=−smdQvO/4.0)1040(4121054122342=××××=×=−−ππsvst16.04.010653=×==−st1=smtsv/065.0110653=×==−Qmin/9.4/1016.8)1040(41065.04135232LsmdvQ=×=××=×=−−ππMK6MK6min/9.4/1016.835LsmQ=×=−min/1.25min/9.4min/30LLLQQQOy=−=−=§3.2§3.2.1.16vmqvdxPdCxKF⋅∆==απ2sin[9]vx-qC-82.0~77.0=qCmd-P∆-α2-.[10]3-4LZ3.51740%6%2.7%3710.)1)()(4)(2)((42−++=rtrtrtrtPLDFδδδδπδ[10](3-1)FLDPδtrδLDPδrδFtF18t65.Chaimowitsche[10]3-1[10]3-1Tab.3-1Relationsbetweendiameterofspoolandfittingintervalin(mm)10-4in(10-3mm)10-4in(10-3mm)1/46.3512.54512.71/212.725.08717.83/419.137.629.524.1125.4512.713330.50.73-4LZ3.5190.02mm0.01mm§3.2.23-1Fig.3-1Structurediagramofvalveforregulatingspeed.gd:gggQVd=×241πgggVQd×≥63.4mmgQ(L/min)min/30LQg=20gVd(m/s)smVg/4=mmVQdggg68.1243063.463.4=×=×≥mmdg14=.Dd:gQVdD=×−)(4122πV(m/s)smV/4=mmVQDg17.1543054.554.5=×=×≥D=18mmDd21≥Dd95=mmDd10189595=×==.maxδmaxδmaxδπD)(4122dD−π)(4122maxdDD−≤πδπmmDdD11.3184101842222max=×−=−≤δmm3max=δ.fL:qsmQqg/105.5601030011.001.0363−−×=××=×=DmD31018−×=rδmr53101001.0−−=×=δPδPaMPaP6101616×==∆ε1=εµYB-N46(GB2521-1981)503-4LZ3.521smm/33~242=υ,smm/272=υ,3/890mKg=ρ,sPa⋅×=××=×=−−26104.28901027ρυµmqPrDLfa362635331043.1)1231()105.5()104.2(12)1016()10()1018()231(12)()(−−−−−×=×+×××××××××=+∆=πεµδπmLLfaf331029.41043.133−−×=××=×≥mmmLf5.4105.43=×=−mm5.0mmLf55.05.4=+≥mmLf6=.SmmLf5.4=mmLSf5.735.4max=+=+=δmaxδmm3max=δ70DGB4375GaPG9104.78×=1JB/T3338.1-93F1F2F2JB/T3338.1-931n61=nn4=n22dmmmd3108.28.2−×==DmmmD21053.23.25−×==C04.98.23.25===dDC'P:mmNmNn/29.9/1029.9404.98108.21078.48CGdP33-393'=×=×××××===K16.104.9615.0404.94104.94615.04414=+−×−×=+−−=CCCKbσabP6101710×=σGB4375d=mm8.270D[]bστ)45.0~38.0(][=GB/T1239.6-92abP66105.76910171045.045.0][×=××==στ0HmmH460=t24612=−=−=nnn,mmndHt45.1048.25.1465.10=×−=−=1HmmH5.291=2HmmH222=1FNPHHF29.15329.9)5.2946()('101=×−=×−=2FNPHHF96.22229.9)2246()('202=×−=×−=2τaaPPFd6623-222105.769][1041.75996.222)018.2(9.041.1688KC×=×=×××××=×=τππτb3.582.13.25460===DHb3-4LZ3.523NFFf96.2222==.1.VFrDLvFV∆=µπ[10](3-2)DmD31018−×=r∆mr53101001.0−−=×=∆L()mmL33103810265.445.438−−×=××+++×=