喷嘴结构对高速滚动轴承油气润滑两相流特性的影响.docx

2015年1月

第40卷第1期

润滑与密封

LUBRICATIONENGINEERING

Jan.2015Vol.40No.1

DOI:10.3969/j.issn.0254-0150.2015.01.006

喷嘴结构对高速滚动轴承油气润滑两相流特性的影响*

刘成张进华闫柯2翟强2曾群锋2

(1.西安交通大学机械制造系统工程国家重点实验室陕西西安710049;

2:西安交通大学现代设计及转子轴承系统教育部重点实验室陕西西安710049)

摘要：基于油气两相流基本理论，采用Fluent仿真软件建立油气润滑系统喷嘴、轴承腔的油气两相流模型，分析油气两相流流经直接喷射型和内圈喷射型2种结构喷嘴后在轴承腔内的流动状态，分析内圈喷射型喷嘴的竖直管道与倾斜管道夹角及喷嘴出口结构等关键设计参数对轴承内部油气两相流分布状况的影响。仿真结果表明：内圈喷射型喷嘴具有更好的润滑效果，减小了油气润滑系统的耗油量和耗气量；竖管与倾斜管道夹角越小，越利于环状流的保持，供油均匀性越好；突扩管结构设计，有利于缓解因油气波动造成的供油不均匀。

关键词：油气润滑；喷嘴；油气两相流；管道

中图分类号：TH117.1文献标志码：A文章编号：0254-0150(2015)1-028-4

InfluenceofNozzleStructureontheTwo-phaseFlowCharacteristic

inOil-airLubricationSystemforHigh-speedRollingBearing

LiuChengZhangJinhua1YanKe2ZhaiQiang2ZengQunfeng2

(1.StateKeyLaboratoryforManufacturingSystemsEngineering,XianJiaotongUniversity,XianShaanxi710049,China;

2.KeyLaboratoryofEducationMinistryforModernDesignandRotor-BearingSystem,

XianJiaotongUniversity,XianShaanxi710049,China)

Abstract:Thetwo-phaseflowmodeloftheoil-airlubricationsystemwasbuiltbyFluentsoftwarebasedontwophaseflowstheory.Thestateofoil-airtwo-phaseflowafterflowingthroughdirectjetnozzleandinnerringjetnozzlewereana-lyzed.Fortheinnerringjetnozzle,theinfluencesofthekeystructureparameters,theanglebetweentheverticalpipeandtheinelinedpipelineandthenozzleexitstructuretooil/airphasedistributioninbearingwerealsoanalyzed.Thesimula-tionresultsshowthattheinnerringjetnozzlehasbetterlubricatingeffectthanthedirectjetnozzle,thenecessaryamountsofoilandairareless.Smallanglebetweentheverticalpipeandtheinclinedpipelineisconducivetomaintainingthean-nularflow.Thedesignofsuddenexpansionpipealleviatesthenonuniformitycausedbyoil/airfluctuation.

Keywords:oil-airlubrication;nozzle;oil-airtwo-phaseflow;pipeline

超高速机床已经成为金属切削的主流，轴承作为其支撑部件经常在极限工况条件下运转，润滑类型直接影响其性能的发挥。油气润滑作为一种