erthepressureofworkingfullloadspeed,theactualoperatingspeedofeachpumpcanbecontrolledunloadingvalvetothemaintankrunsbetween0andthemaximumspeedofoperation. 4.Themainworkupthespeedslider Therateofincreasedependsontheworkoftheslidermainfueltankincreasethereturnrateofreturnincreasedcylinderspeedcanbecalculatedby: V=Q/S WhereV:speedupthereturntank S:returnthetotalworkingareaofcylinderS=2*π*0.22=0.25m2 Q:45unitsworkingunderthepressureofhydraulicpumpinthereturnofthetotalflow, Becausetheuseofthevariablepump,variablepumpflowandpressureoftheworkrequiredtocalculatedasfollows: Q=60ηN/P(themeaningofthesymbolabove) OnetankworkingpressurePmaybethereturncalculatedthetotalworkload,theslidewiththethreemainfueltankweight300tons,ignoringfriction,thetotalworkisaboutresistance3MN,workingpressureofthereturn:
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