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EnglishinMechatronicEngineering.ppt

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EnglishinMechatronicEngineeringWhytechnicalEnglish? 1.Information 2.Integration 3.Internationalization ……Howtolearn? 1.Allthetechnicaltermslearned shouldberecited. 2.rightmethod 3.alittlebittechnique ……Lesson1Couplings,Clutches,ShaftsandSpringsCoupling Acouplingisadeviceforconnectingtheendsofadjacentshafts.Inmachineconstruction,couplingsareusedtoeffectasemi-permanentconnectionbetweenadjacentrotatingshafts.coupling联轴器 adjacent相邻的 shaft轴 effect实现 semi半…forexamplesemiconductor半导体 permanent永久性的,-magnet永磁磁铁Theconnectionispermanentinthesensethatitisnotmeanttobebrokenduringtheusefullifeofthemachine,butitcanbebrokenandrestoredinanemergencyorwhenwornpartsarereplaced.inthesensethat从…的意义上来说 breakbroken脱开 restore恢复 worn(wear)part磨损件 Thereareseveraltypesofshaftcouplings,theircharacteristicsdependonthepurposeforwhichtheyareused.Ifanexceptionallylongshaftisrequiredforalineshaftinamanufacturingplantorapropellershaftonaship,itismadeinsectionsthatarecoupledtogetherwithrigidcouplings. exceptionallylongshaft超长轴 lineshaft主传动轴 propeller推进器、螺旋桨 insection分段 rigidcoupling刚性联轴器Inconnectingshaftsbelongingtoseparatedevicessuchasanelectricmotorandagearbox,precisealigningoftheshaftsisdifficultandaflexiblecouplingisused.Thiscouplingconnectstheshaftsinsuchawayastominimizetheharmfuleffectsofshaftmisalignment.gearbox齿轮箱、变速箱 aligning对中、同心、同轴 flexiblecoupling弹性联轴器 misalignment偏心Flexiblecouplingsalsopermittheshaftstodeflectundertheirseparatesystemsofloadsandtomovefreelyintheaxialdirectionwithoutinterferingwithoneanother.Flexiblecouplingscanalsoservetoreducetheintensityofshockloadsandvibrationstransmittedfromoneshafttoanother.movefreely=float浮动 axialdirection轴向 radialdirection径向 interfere干涉、干扰 serveto用来 intensity强度 shockload冲击负荷Clutch离合器 Aclutchisadeviceforquicklyandeasilyconnectingordisconnectingarotatableshaftandarotatingcoaxialshaft.Clutchesareusuallyplacedbetweentheinputshafttoamachineandtheoutputshaftfromthedrivingmotorandprovideaconvenientmeansforstartingandstoppingthemachineandpermittingthedriv