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1、四．艉轴艉管校中及其固定ALIGNMENTANDFIXINGOFSTERNTUBE4.1艉管就位POSITIONINGOFSTERNTUBE4.1-1:艉管就位条件PREPARATIONOFSTERNTUBEPOSITIONINGA.艉管中心线的找正DECIDINGOFSTERNTUBECENTERLINEA.1将艉管布置于车间平台上保持水平;PLACESTERNTUBEHORIZONTALONPLATFORMINWORKSHOPA.2根据艉管前后φ655孔中心线在艉管前后端面上在水平方向及垂直方向上划出水平线和垂直线并打好洋冲眼,那么前后艉管端面的十字线的交点的连线即为艉管外圆
2、的理论中心线.完工成后需交船东船检认可.DRAWAHORIZONTALLINEANDAVERTICALLINEACCORDINGTOTHECENTERLINEOFφ655HOLEATSTERNTUBEFOREANDAFT.END,ANDMAKEAMARK,SOTHELINEBETWEENTHETWOINTERSECTIONPOINTSSTATEDABOVEISTHETHEORYCENTERLINEOFS/TOUTERCIRCLE,ANDSHOULDBEAPPROVEDBYSHIPOWNERANDSURVEYER.B.在本工艺进行的过程中,船上应停止冲击和有振动的工作.WHENTH
3、ISSTEPISBEINGDONE,ANYIMPACTINGWORKORVIBRATIONJOBSHOULDBESTOPPED.4.2艉管就位POSITIONINGOFSTERNTUBEA.按“浇注环氧总装图”将八只艉管调整螺栓(图6)预先布置到相应位置处,螺栓头部应不伸入支撑套内部以免影响艉管放入;PREPLACE8PCSJACKINGSCREWS(DRAWING6)ATTHECORRESPONDINGPOSITIONACCORDINGTO“POURINGEPOXYASSEMBLY”DRAWING.B.按“环氧浇注总装图”焊好前后艉管支撑套上的四个透气管及二个注入管.注入管及透
4、气管均采用φ27X2.5无缝钢管.钢管上应无任何油漆,油污等;WELDTHE4PCSAIRVENTPIPESAND2PCSFILLINGPIPESONTHEFWDANDAFTSTERNOUTERBOSSESACCORDINGTOTHE“POURINGEPOXYASSEMBLY”.THEFILLANDVENTPIPESISSEAMLESSSTEELPIPEOFφ27X2.5,WITHOUTANYPAINTANDOILETC.C.为防止艉管塞入支撑套后发生轴向位移,需按附图9制作一根法兰面压板,并根据图9中所示位置焊好固定螺栓M24;MAKE1PCSTOPPINGPLATEBYCHA
5、NNELSTEELFORPREVENTINGTHEMOVEMENTALONGTHESHAFTLINEAFTERPUSHINGTHESTERNTUBEINTOTHESTERNFRAMEBOSS,SEEDRAWING9,ANDWELDTHEFIXINGSCREWM24ASDRAWING9.D.根据“浇注环氧总装图”安装密封板(图5);INSTALLSEALINGPLATE(DRAWING5)ACCORDINGTOTHE“POURINGEPOXYASSEMBLY”.E.准备至少六只工作载荷为4.5吨的手拉葫芦.PREPAREATLEAST6PCSCHAINBLOCKSWHOSEWORK
6、LOADIS4.5TON.F.将艉管放至图7中所示位置,艉管上下方向需按轴系布置图摆正,调节小车上下水平位置使得艉管中心线与轴理论中心线平行.PUTSTERNTUBETOTHEPLACESHOWNONDRAWING7,ADJUSTITALONGVERTICALDIRECTIONASSHAFTINGARRANGEMENTDRAWING,ANDADJUSTTHETROLLEYUNTILSTERNTUBECENTERLINEPARALLELWITHSHAFTTHEORYCENTERLINE.G.将提升杆装至艉管的艏端,提升杆和艉管接触部份均需用铜皮衬垫以防划伤艉管内表面并用铜螺栓紧固好
7、（图8）.检查艉管清洁度.艉管前后支撑套内表面及艉管外表面等与环氧树脂接触处(含浇注孔,透气孔内表面)均需清除铁锈,油污,毛刺,焊渣,油漆和灰尘等.提交维信服务工程师检查清洁并满足要求;8INSTALLLIFTINGRODTOTHEFWDSTERNTUBE,ADDBRASSPADATCONTACTPARTBETWEENLIFTINGRODANDSTERNTUBEPREVENTINGFROMSCUFFINGTHEINNERSURFACEOFSTERNTUBEANDFIXWITHBR
