ZDJ 电动转辙机结构Structure and principle of ZD J Electric Point Machine

ZDJ9电动转辙机结构StructureandprincipleofZD(J)9ElectricPointMachineZD(J)9typeelectricpointmachineservestochangetheswitchrail(blade,tongue)andpointrail(noserail)ofallkindsofrailwayswitchesandoutsidelockingdevicesofswitch.

Theelectricpointmachinemeetstheunder-notedrequirements:

★ Detectingtheendpositionofswitchrailorpointrailbyquick-actingswitch.

★ Changingswitch.Havingthelockingdevicewhichkeeptheswitchrailorpointrailontheclosedposition.LockingblockLockingironHavingthecut-offindicationfunctionafterswitchistrailed.LockingironLevelmandrilErectmandrilTheelectricpointmachineadoptsballbearingleadingscrewretarder,whichhashighefficiencycharacteristic.Themotoradoptsthree-phaseAC380Vpowersource,sothecontroldistanceofcablesingle-wireislong,thefailureofACmotorislessthanDCmotor.Thecontactsystemusesthestaticcontactgroupmadeofberyllium-bronzeandthemotivecontactringmadeofcopper-tungstenalloy.Theextendedrodpartsareplatedwithchromiumforproof-rust.Thepolytheneblock-holeringandoiledfeltringareusedforsupportandproof-rust.TherotationalandslidingsurfaceadoptsthebushandgasketmadeofSF2compoundmaterial,sothemaintenanceworkloadofthepointmachineisless.Incaseofpowerfailureormaintenanceisneed,itcanturntheswitchshafttocutoffthecontactsofsafetyswitch,theninsertacrank-handle,thepointmachinecanbeoperatedmanually.Inordertomeetuser’sneedthattheinvestmentofoverhaulreconstructionissaved,ZD9electricpointmachinehasthederivedDCtypeseries.StructureTheactionprincipleViathedescended-speedofretarder2transmission,whichmountedonmotor1,themotordrivetorqueistransferredtothefrictionalclutch3.Mountedinthefrictionalclutchistheinnerfrictionaldisk,whichitstwosidesaresinteredbycopper-basedfrictionalmaterial.Viathespline,theinnerfrictionalrotationistransferredtoballbearingleadingscrew4ofballbearingleadingscrewpair,thentheballbearingleadingscrew4rotationisconvertedintoalinearmovementoftheballbearingleadingscrewnut5.Thepush-boardsheath,whichcoveredontheballbearingleadingscrewnut,pushthelockingblock6onthethrowrod10,undertheactionofthelockingiron7,therelease,transfer,lockingmovementofthepointmachineiscompleted.AttachedFigure7istherelativesketchbetweenthepush-boardsheath,throwingrod,lockingblockandlockingiron.ThelockingironofZD(J)9,ZD(J)9-B,D,Etypepointmachineisfixedoncastironhousingviathetrailing