OM手册阅读测验(六)(2013.4.11)姓名________________分数_________________一、英译汉(每题10分,共10题,满分100分)1、Heatflowlimitationsincorporateinsulation,cooling,andmultilayeredstructures.Thecylindricalportionoftheshelliscooledbycoolingairproducedfromanexternaldevicewithblowers.控制热量措施包括保温,冷却,和多层结构。燃机外壳的圆柱部分是通过鼓风机和外部设备制造的冷却空气进行冷却。2、The18castnozzlesegments,eachwithtwopartitions(orairfoils)arecontainedbyahorizontallysplitretainingringwhichiscentre-linesupportedtotheturbineshellonlugsatthesidesandguidedbypinsatthetopandbottomverticalcentre-lines.18个浇铸喷嘴段,每段有两个围板(或者说螺旋桨)包含在一个水平分割定位环内。水平分割定位环的中心线由透平外壳的表面的凸耳提供确保,通过顶部和底部的针来确保垂直中心线的位置。3、Attachedtotheinsidediametersofboththesecond-andthird-stagenozzlesegmentsarethenozzlediaphragms.Thesediaphragmspreventairleakagepasttheinnersidewallofthenozzlesandtheturbinerotor.附属于二级和三级喷嘴段内径的是喷嘴隔膜,这些隔膜用于阻止通过喷嘴内壁及透平静叶的空气的泄露。4、Unlikethecompressorblading,theturbinebuckettipsdonotrundirectlyagainstanintegralmachinedsurfaceofthecasingbutagainstannularcurvedsegmentscalledturbineshrouds.与压缩机叶栅不同,透平叶片顶端不是直接铺设在壳体经过机加工的表面上,而是依靠在被称为护板的环形弯曲段上。5、Thestrutsmustbemaintainedatauniformtemperatureinordertocontrolthecentralpositionoftherotorinrelationtothestator.为了维持静叶和动叶的相对中心位置,框架必须保持统一的温度。6、Journalbearings,ellipticaltypearecharacterizedbytheirnon-cylindricalboresandaredesignedtoimprovethestabilityoftheshaftsathighspeeds.椭圆型滑动轴承的特征是它非圆柱形的内径,这种设计促进了高速旋转过程中轴的稳定性7、Thetwomainbearingsarepressure-lubricatedwithlubricatingoilsuppliedfromthelubereservoirintheturbinebase.Whenlubricatingoilentersthebearinghousinginlet,itflowsintoanannulusaroundthebearingliner.两个主轴利用透平底座中润滑油箱提供的润滑油进行压力润滑。当润滑油进入轴承外壳入口,继续流入环绕轴线的环形区域。8、Thrustbearingsareprovidedtosupportthethrustloadsdevelopedontherotorsurfacesofagasturbineunit.Thethrustloadimposedonsuchabearingisthealgebraicsumoftheforcesthatactontherotorassemblyinadirectionalongtherotoraxis.止推轴承为燃机单元转子表面产生的止推负荷提供支持。施加于轴承的止推负荷是作用于沿着动叶轴径向装配的动叶的力的代数和。9、Couplingsareusedtotransmitstartingtorquefromtheaccessorygeartothegasturbineaxialcompressorandtotransmitshaftpowerfromtheturbinetothedrivenreductiongear.联轴器?离合器?用于传送来负荷齿轮产生的启动力矩到燃机透平轴流式压缩机以及将透平产生的轴功率去驱动减速齿轮10、Theairinletsystem,down-streamoftheairfilteringinstallation,consistsofanairduct,followedbysectionsofparallelbafflessilencers,thenascreensystemlocatedinaninletelbow,afterwhichairflowreachesthegasturbineairinletplenum.空气进气系统,空气过滤装置的下游包含风道,紧接着是一段并行挡板消音器,然后是位于进口弯头的过滤系统,之后气流到达燃机透平进气室。