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

ZDJ9电动转辙机结构StructureandprincipleofZD(J)9ElectricPointMachine

ZD(J)9typeelectricpointmachineservestochangetheswitchrail(blade,tongue)andpointrail(noserail)ofallkindsofrailwayswitchesandoutsidelockingdevicesofswitch.

Theelectricpointmachinemeetstheunder-notedrequirements:

★ Detectingtheendpositionofswitchrailorpointrailbyquick-actingswitch.

★ Changingswitch.

Havingthelockingdevicewhichkeeptheswitchrailorpointrailontheclosedposition.LockingblockLockingiron

Havingthecut-offindicationfunctionafterswitchistrailed.LockingironLevelmandrilErectmandril

Theelectricpointmachineadoptsballbearingleadingscrewretarder,whichhashighefficiencycharacteristic.Themotoradoptsthree-phaseAC380Vpowersource,sothecontroldistanceofcablesingle-wireislong,thefailureofACmotorislessthanDCmotor.Thecontactsystemusesthestaticcontactgroupmadeofberyllium-bronzeandthemotivecontactringmadeofcopper-tungstenalloy.Theextendedrodpartsareplatedwithchromiumforproof-rust.Thepolytheneblock-holeringandoiledfeltringareusedforsupportandproof-rust.TherotationalandslidingsurfaceadoptsthebushandgasketmadeofSF2compoundmaterial,sothemaintenanceworkloadofthepointmachineisless.Incaseofpowerfailureormaintenanceisneed,itcanturntheswitchshafttocutoffthecontactsofsafetyswitch,theninsertacrank-handle,thepointmachinecanbeoperatedmanually.Inordertomeetuser’sneedthattheinvestmentofoverhaulreconstructionissaved,ZD9electricpointmachinehasthederivedDCtypeseries.

Structure

TheactionprincipleViathedescended-speedofretarder2transmission,whichmountedonmotor1,themotordrivetorqueistransferredtothefrictionalclutch3.Mountedinthefrictionalclutchistheinnerfrictionaldisk,whichitstwosidesaresinteredbycopper-basedfrictionalmaterial.Viathesp