挖掘机生产能力计算方法的研究-林贵瑜

StudyonmethodsofcalculatingexcavatorproductivityLINGuiyu1WANGXinzhong2ZHOUYang11NortheasternUniversity,Shenyang110004,Liaoning,China2TaiyuanHeavyIndustryCo.,Ltd.AbstractTheproductivityisnotonlyoneofmaintechnicalindexesbutacomplexindex,andtheworkingcycletimeisthemainfactortodeterminetheloaderproductivity.Basedonanalysingthefactorsaffectingtheproductivity,experientialcalculationmethodsforworkingcycletime,excavatingtimeandturningtimeareproposedwithWKseriesexcavatorsbeingtakenforexample,whichoffersreferencesforfinallydeterminingandenhancingtheloaderproductivity.Keywordsexcavator;productivity;workingcycletime;excavatingtime;turningtimeddEEd.Fig1CurvesofrelationshipbetweenequipmentproductivityandrocksizeFig2CurvesofrelationshipbetweenunitexcavatingcostandexplosiverocksizeEdEEddtbKKγKKKγdKEKdγFig3ProportionallineofrelationshipbetweenexcavatingspecificresistanceandexplosiverocksizeKKKKKdEKTab1AverageofloosefactorKofrocksinbucketatexcavatingexplodedrocksKdEKTab2AverageoffullbucketfactorKofexcavatoratexcavatingexplodedrocksKdE°°QEfETQfTTttt't(s)tttt'tTab3DischargingtimeofrocksfromexcavatorstotransportationvehiclestdEdEEtJηβPηJηβPPJωtωtt'ttβnββπntdEEEdEdtdEtdEEETEEE(s)Tab4WorkingcycletimesofWKseriesexcavatorsE°°°°Fig4CurvesofrelationshipbetweenworkingcycletimeofexcavatorsandbucketvolumeTab5TheoreticalproductivitiesofminingexcavatorsofferedbyformerSovietUnionEttTTab6Theoreticalproductivitiesofminingexcavatorsobtainedbycalculatingwithformula(4)(7)Ett'tnnnnTВ.В.Ржевский.ПроцессыОмкрмыйГорныхработ[M].МоскваНЕДРА