表面激光微槽造型滑动副的动压润滑性能分析

《表面激光微槽造型滑动副的动压润滑性能分析》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、江苏大学硕士学位论文ABSTRACTWiththerapiddevelopmentofindustrialtechnology,engineeringrequirementssuchasenergysaving，environmentalprotectionandsaf：etyareincreasing，oneofthecriticaltribopairswithinengine—cylinderblock／pistonringturnsouttObeanimportantfactorinperformanceofpowerandemissions

2、aswellaslocallife，andthustheimprovementoftribologicalperformanceisparticularlyimportant．Meanwhile，thedesignideaoriginatedfiomdragreducinggroovedsurfacemakesmicro-groovestructurestexturedontheworkingsurfacehavingbeenwidelyshared；besides，thecorrespondingbiomimetictribologyresear

3、chprogresshasbeeninfullswing．Inaddition，lasersurfacetexturingtechnologyiswidelyusedinsurfacemodificationandremodeling，forwhichnon-contactforce，goodrobustnessandhighprecisionetc．，andthenitwillbethebasicmethodtorealmemulitscalestructuresonthefrictionsurface．Therandommodelinanaly

4、sisofsurfaceroughnesshasoneeigenfeature，whichreadsthecharacteristicsparametersofsurfaceroughnessneedstobesmallenoughcompared丽ththelubricatingoilfilm．Undoubtlessly,thislimitisdifferapartfromthefmestructuresinducedartificiallyontheworkingsurface，ofCOUrsg，whichrestrictsthedesigno

5、fmicrostructuresincludingtexturingdepthandshapeofequalorgreaterthanthenominalfilmthicknessofviscosityfluidfield．Therefore，thecomputationalfluiddynamicsmethodbasedonsolvingtheNavier-Stokesequationsisusedinthisthesis，wherelaminarflowingmodelandoneselectedturbulencemodel耐thlowRey

6、noldsnumberwerecalculatedtOobtainseriesofoptimalparameters．Firstly,hydrodynamiclubricationpropertieswerediscussedunderthedifferentconditionsbycomparingtheequivalentfrictionfactorontheslidingwall，thenetviscousforceofmodelingfieldanddynamicpressureinducedbynon—smoothsurfaceetc．A

7、ndrelativecoefficientoffrictionandthebearingcapacityfactorwerespecifiedreferencecoordinatesbytheweightingfactormethod，andresultsshowthattexturedsurface丽tlltrapezoidalgrooveshasbettercomprehensivetribologicalproprietythanothers，thecontributionratesoftheisoscelestrapezoidgrooves

8、(IG)andrectangulartrapezoidgrooves(RG)reachtO0．78andO．58separ