毕业设计英文翻译原文

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1、英文翻译英文原文1.GeneraldescriptionoftheSIEMAGdiscbrakeunitThisbrakeunitistheelectro-hydrauliccontrolsystemofagearlessdiscbrakeforwinders.Thebrakeunitoperatesontheexhaustprinciple,i.e.thebrakingforceisgeneratedbysetsofdiscspringsandreleasedbyhydraulicpressure.Thebrakingforcegeneratorswiththebrakes

2、hoesdirectlyactaxiallyonthebrakedisc.Thebrakingforceisgeneratedbysetsofdiscspringsandtransmittedontothebrakeshoes.Thenumberofbrakeelementsdeterminestherespectivebrakingforcerequired.Assoonasthebrakesarebeingreleased,thebrakeshoesareliftedformthebrakediscwiththeaidofpressureoil.Duringthebrak

3、ing,theoilflowsbackintothetankandthebrakeshoesarebeingpressedagainstthebrakedisc.ThebrakingforcegeneratorstypeBSFG408aresseriesproductsuppliedbytheSwedishfirmASEA-Hagglunds.Theyhaveamaximumpress-downforceof　2X7906kN.Forreasonsofbettersystemavailability,thehydraulicpressureisgeneratedbytwore

4、gulatingpumpsthatareeachdrivenbyanelectricmotor.Bothpumpsarestartedwhenthesystemisbeingswitchedon.Anyfailureofapumpwillbesignaled.Theoilfiltrationisundertakenbyapressurefilter‘6.2’providedinfrontofthebrakingforcegenerators.Furthermore,twogearpumpsthataredirectlycoupledwiththeregulatingpumps

5、,maintainapermanentoilcoolingandfilteringcircuitduringsystemoperation(filter‘6.1’andcooler‘14’).Bothfiltershaveanelectricalcontaminationcontrol.Themeshsizeofthefiltersisspecifiedbythesuppliertobe10μm(seeTASNo.3.9.6.4).Theequipmentincludesacontrolledelectricaltankheating.Thefluidlevelintheta

6、nkismonitoredaswell.Theservicebrakingisdonewiththeaidoftwoelectricallycontrolledproportionalpressurereliefvalves‘43.1’and‘43.2’thatarehydraulicallyconnectedinseries.Thesafetybrakingisdonewiththeaidofposition-controlled4/2-wayelectrovalves‘53.1’、‘53.2’、‘39.1’、‘39.2’、‘58.1’、‘58.2’、‘66.1’，and‘

7、66.2’whichareelectricallyactuatedinclosed-circuitconnection.Intheeventofasafetybraking,thedirectionalcontrolvalves‘39.1’and‘39.2’areswitchedoff,separatingthusthepumppressurefromtheremainingbrakereleasingsystem(hydraulicshunt).Duringthesafetybraking,thedi