第十二章滑动轴承Sleevebearingsppt课件.ppt

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1、第十二章Sleevebearings滑动轴承§12－1Generalconsiderations概述§12－2Materialsofsleevebearings(materialsofbearingshellsandinserts)滑动轴承材料（轴瓦及轴承衬材料）§12－3Simplifiedcalculationsforbearingsoperatingwithnon-fluidfriction非液体摩擦轴承设计计算§12－4Load-carryingmechanicsofthehydrodynamiclubricationbea

2、rings液体动压润滑轴承承载机理§12－1generalconsiderations概述1）Non-fluidfrictionbearings非液体摩擦轴承2）Fluidfrictionbearings液体摩擦轴承一、Typesofsleevebearings分类IWithrespecttofrictioncondition：按摩擦状态分IIWithrespecttoload-carryingdirection按承载方向分：1）Thrustbearings推力轴承：FA2）Radialbearings向心轴承：FrRadialbe

3、arings向心轴承：FrSolidbearings:usedforlowspeedandlightloadshaft(theclearanceinthebearingcannotbeadjustedanditisdifficulttoassembly)整体式：低速轻载（间隙不可调，安装困难）Splitbearings:commonapplication剖分式：一般应用SolidshellSplitshells2、ShortcomingsHighstartingtorque起动阻力大1、Advantages①Operatingste

4、ady,reliablyandnoiselessly工作稳定、可靠、无噪音②Underfluidfriction,frictionandweararesmallandoilfilmhasamarkeddampingeffect液体摩擦时，摩擦、磨损小，油膜吸振二、Characteristicsandapplications特点和应用3、Applications应用①Shaftsrunningatexceptionallyhighspeedsorrequiringhigh-precisionguidanceorcarryingheav

5、yload（fluidfrictionbearings）高速、重载、精密（液体摩擦滑动轴承）②Shaftsrunningatlowspeednoncriticalmechanisms（non-fluidfrictionbearings）低速、轻载、精度要求低时（非液体摩擦滑动轴承）③Specialoccasion：forexample,splitshellisrequiredoroperatinginaggressivemedia.特殊场合:如必须剖分或者宇航、探海等三、Contentsofthechapter本章内容①Select

6、ionofthebearingmaterials轴承材料选择②Designofnon-fluidfrictionbearings非液体摩擦滑动轴承设计计算③Load-carryingmechanicsofthehydrodynamiclubricationbearings液体摩擦轴承承载原理§12－2Materialsofsleevebearings（materialsofbearingshellsandinserts）滑动轴承材料（轴瓦及轴承衬材料）Bearingshell:Elementcontactingdirectlywit

7、hjournal轴瓦：轴承直接与轴颈相接触的零件Bearinginsert:thinlayerwhichisadheredonbearingshellbycastingorpressuringin.轴承衬：有的轴瓦是在轴瓦整体上用浇铸或压合的方法粘附上一层另一种材料，这一薄层材料称为轴承衬。一、Requirementsforbearingmaterials：①Smallfrictioncoefficient,goodheatconductivityandlowlinearexpansioncoefficient(efficiency

8、high,stabledimensionandsmalltemperatureincreaseoperating)摩擦系数μ小，导热性好，热膨胀系数小（效率高、尺寸稳定、温升小）②Highwearresistance,goodcorr