新版轮机英语unit25_Anchor_windlass_and.ppt

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1、Lesson25AnchorwindlassandMooringwinch锚机和绞缆机AnchorhandlingequipmentThewindlass（锚机）istheusualanchorhandlingdevicewhereonemachinemaybeusedtohandlebothanchor.Amorerecentdevelopment,particularlyonlargevessels,isthesplitwindlasswhereonemachineisusedforeachanchor.Oneunitofa

2、splitwindlass(分离式锚机）isshowninFig.25-1.Therotatingunitsconsistofacablelifter(锚链轮）withshapedsmug（凸起）togriptheanchorcable（锚链）,amooringdrum（绞缆筒）forpayingout（放松）orlettinggo（放出）ofmooringwiresandawarpendforwarpingduties.Eachoftheseunitsmaybeseparatelyengaged（啮合）ordisengaged

3、bymeansoradogclutch（牙嵌离合器）,althoughthewarpendisoftendriveninassociationwiththemooringdrum.Aspurgear（正齿轮）assemblytransmitsthemotordrivetoshaftwherethevariousdogclutchesenablethepowertake-off.Separatebandbrakes（独立式刹车）arefittedholdthecablelifterandthemooringdrum（绞缆筒）whe

4、nthepowerisswitchedoff.Thecablelifterunit（锚链轮）,showinFig.25-1,ismountedsoastoraiseandlowerthecablefromthespurlingpipe（锚链管）,whichisatthetopandcenterofthechainorcablelocker（锚链舱）.Detailsofthesnugs（卡块）usedtogripthecableandbandbrake（带式刹车）canbeseen.Anchorcapstans（起锚绞盘）areu

5、sedinsomeinstallationswherethecablelifterrotatesaboutaverticalaxis.Onlythecablelifterunitislocatedondeck,thedrivingmachinery（驱动机械）beingonthedeckbelow.Awarpingendorbarrelmaybedrivenbythesameunitandispositionednearthecablelifter.Theefficientworkingoftheanchorwindlassis

6、essentialtothesafetyoftheship.Ananchorwindlasscanexpecttofulfill（满足）thefollowing:1.Thewindlasscablelifterbrakesmustbeabletocontroltherunninganchorandcablewhenthecablelifterisdisconnectedfromthegearduring“lettinggo”（放锚）.Averagecablespeedsvarybetween5-7m/secduringthiso

7、peration2.Thewindlassmustbeableheaveacertainweightofcableataspecifiedspeed（额定转速）.This“fullload”dutyofthewindlassvariesbutiscommonlybetween4and6timestheweightofoneanchor,thespeedofhaulbeingatleast9m/minupto15m/min.3.Thebrakingeffort（刹车效果）obtainedatthecableliftermustbe

8、atleastequalto40percentofthebreakingstrengthofthecable.Mostanchorhandingequipmentsincorporate（包含）warpendsformooringpurposes（系泊）andl