液压管路和管接头.doc

《液压管路和管接头.doc》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、镂搦嗑拥截膛砾晔榫垠甫镪叨姝睢烷韭噙衬畜都堂颏颓酡滇笥侄杖挨历昝倘圮龌恁厉熄摸驮附录霞芾困谢喊开诘谦鲋咦英语原文胳骇蔓冬配镎厢高杉笔HydraulicConductorsandFittings瓠昏哓肉碳濒儿碍脖鲍EricSandgren*,T.M.Cameron鹃钇揿薄怛贳汰辄县蒙toaccountforuncertaintyaMechanicalEngineering,VirginiaCommonwealthUniversity,601WestMainStreet,P.O.Box,Richmond,VA23284-3015,USAReceived19October2001;accepted5

2、June2002诙貌靠烙脆醑韩子删哇1.1INTRODUCTION抢粘沪浦袭假厉镘犏毁Inahydraulicsystem,thefluidflowsthroughadistributionsystemconsistingofconductorsandfittings,whichcarrythefluidfromthereservoirthroughoperatingcomponentsandbacktothereservoir.Sincepoweristransmittedthroughoutthesystembymeansoftheseconductinglines(conductorsa

3、ndfittingsusedtoconnectsystemcomponents),itfollowsthattheymustbeproperlydesignedinorderforthetotalsystemtofunctionproperly.菏鞭嫔辗槌剜嗑尻兑彼Hydraulicsystemsuseprimarilyfourtypesofconductors:耢蛐厉仍俄举诅氰岍蔬1.Steelpipes髯砰戳荦洧眺锍揶黛态2.Steeltubing渫恚花文衮婆芊分缁疠3.Plastictubing辘透山卷鼷惘亟孚韶混4.Flexiblehoses蝴荇隼椒倘腑铣多巨寨Thechoiceofw

4、hichtypeofconductortousedependsprimarilyonthesystem’soperatingpressuresandflowrates.Inaddition,theselectiondependsonenvironmentalconditionssuchasthetypeoffluid,operatingtemperatures,vibration,andwhetherornotthereisrelativemotionbetweenconnectedcomponents.毽哲餍爝渭免癣情每爆Conductinglinesareavailableforhan

5、dlingworkpressuresupto10,000Paorgreater.Ingeneral,steeltubingprovidesgreaterplumbingflexibilityandneaterappearanceandrequiresfewerfittingsthanpiping.However,pipingislessexpensivethansteeltubing.Plastictubingisfindingincreasedindustrialusagebecauseitisnotcostlyandcircuitscanbeveryeasilyhookedupdueto

6、itsflexibility.Flexiblehosesareusedprimarilytoconnectcomponentsthatexperiencerelativemotion.Theyaremadefromalargenumberofelastomeric(rubberlike)compoundsandarecapableofhandlingpressuresexceeding10,000Pa.鬏拐劳尺鸷扳幔芴绩煎Stainlesssteelconductorsandfittingsareusedifextremelycorrosiveenvironmentsareexpected.

7、However,theyareveryexpensiveandshouldbeusedonlyifnecessary.Copperconductorsshouldnotbeusedinhydraulicsystemsbecausethecopperpromotestheoxidationofpetroleumoils.Zinc,magnesium,andcadmiumconductorsshou