考虑粗糙度的船舶水润滑高分子轴承弹流润滑性能研究.pdfVIP

考虑粗糙度的船舶水润滑高分子轴承弹流润滑性能研究

摘要：为了揭示表面粗糙度对船舶水润滑高分子材料轴承润滑性能的影响规律，开展水润滑轴承弹流混合润滑理

论研究；建立考虑内衬材料粗糙度和弹性变形的水润滑轴承混合润滑模型，并对模型进行仿真验证；分析内衬粗糙峰

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对水膜厚度、水膜压力分布和承载能力的影响规律。研究结果表明：在转速增大的过程中，内衬粗糙度的增大会减缓

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水膜厚度的增幅比，使轴承需要更高的转速来进人流体动压润滑状态；减小轴承内衬粗糙度能有效降低轴承起飞转

速，加快轴承由混合润滑转变为流体动压润滑的过程，减小轴承与轴颈的局部接触，降低轴承异常振动噪声发生的可

能性。研究结果揭示了内衬粗糙度变化对轴承润滑特性的影响机制，为水润滑轴承的优化设计提供理论参考。

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关键词：水润滑轴承；混合润滑；弹流润滑；表面粗糙度；起飞转速

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StudyontheElastohydrodynamicLubricationofMarineWater

LubricatedPolymerBearingsConsideringRoughness

Abstract:Inordertorevealtheeffectofsurfaceroughnessonthelubricationperformanceofmarinewaterlubricated

polymerbearings,theoreticalresearchonelastohydrodynamiclubricationofwaterlubricatedbearingswasconducted.Ahy-

bridlubricationmodelofwaterlubricatedbearingconsideringtheroughnessandelasticdeformationofliningmaterialwas

establishedandverifiedbysimulation.Theinfluenceofinnerlinerroughnesspeakonwaterfilmthickness,waterfilmpres-

suredistributionandbearingcapacitywasanalyzed.Theresultsshowthattheincreaseoflinerroughnesswillslowdownthe

increaseratioofwaterfilmthicknessduringtheincreaseofrotatingspeed,sothatthebearingneedshigherrotatingspeed

toenterthehydrodynamiclubricationstate.Reducingtheroughnessofthebearingliningcaneffectivelyreducethetake-off

speedofthebearing,acceleratetheprocessofthebearingfrommixedlubricationtohydrodynamiclubrication,reducethe

localcontactbetweenthebearingandthejournal,andreducethepossibilityofabnormalvibrationandnoiseofthebearing.

Thisresearchrevealsthemechanismoftheinfluenceofthechangeoftheinnerlinerroughnessonthelubricationcharac-

teristicsofthebearing,andprovidesatheoreticalreferencefortheoptimaldesignofthewaterlubricatedbearing.

Keywords:waterlubricatedbearings;mixedlubrication;elastohy