整体俯仰-Measurement and Analysi

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1、MeasurementandAnalysisupontheGravitycenterPositionoftheLuffingsystemofstackerandreclaimerinwholeluffingstyleLiYiminPostal.Code:116013.Dalian,thePeople’sRepublicofChinaDALIANHEAVYINDUSTRIESANDCRAN,LTD.Keywords:stackerandreclaimer;gravitycenterofluffingsystemmeasure

2、mentStackerandreclaimercouldbeinwholeorpartialluffingstylewhenapplyinghydrauliccylinderstodrivetheluffingsystem.Thewholeluffingstyleistheslewingplatformsetwithtwopivotstosupportthewholeluffingsystem,inadditiononeortwocylindersconnectingtheslewingplatformandthehois

3、tingsystemtoadjusttheluffingangle.Inthecourseofluffing,therotatinganglesaroundtheaxisofthetwopivotsontheslewingplatformforanypartsofthegeneralluffingsystem,suchasthebucketwheel,boomandcounter-weightetc.areequal,meaningthattheupperpartisawholepartrotatingaroundthet

4、wopivots.Forcommonstylesofwholeluffingsystemseefig1.andfig2.Inthecourseofusingandmaintenance,theusersneedtoknowandmasterthepositionaswellasthechanginglawofgravitycenterofthewholemachineortheluffingsystemsoastokeeproutinemaintenance,duetovariouskindsofreasons.Thepo

5、sitionaswellasthechanginglawofgravitycenterofthegeneralluffingsystemcouldbeknownbymeansofmeasuringthencalculation.1.ThemeasurementuponunbalancedtorqueTheunbalancedtorquewhichistheproductofthedistancebetweenthegravitycenterofthehoistingsystemandtheaxisofthetwopivot

6、sontheslewingplatformandthetotalweightofthehoistingsystem,couldbegotbymeansofmeasuringthebalanced-to-groundforceatthebucketwheelorthepressureofthecylinderandthencalculation.1.1Measuringtheunbalancedtorquebymeansoftestingthebalanced-to-groundforceatthebucketwheel.1

7、Applyinginstrumentssuchasautomobilecrane,electronicscaleforweightetc.tomeasurethebalanced-to-groundforcesatthebucketwheelintwodifferentluffingangles.Seeingfig3.Testingcondition:withintherangeoftheluffinganglesfortest,thepositionofthegravitycenteroftheluffingsystem

8、mustbeatthefrontoftheaxisofthetwopivotsontheslewingplatformallthetime,preventingfromoverturningback;thecylindermustbeofftheluffingsystem;thebalanced-to-