喷嘴结构对高速滚动轴承油气润滑两相流特性的影响  

Influence of Nozzle Structure on the Two-phase Flow Characteristic in Oil-air Lubrication System for High-speed Rolling Bearing

作　　者：刘成[1] 张进华[1] 闫柯[2] 翟强[2] 曾群锋[2] 

机构地区：[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

出　　处：《润滑与密封》2015年第1期28-31,36,共5页Lubrication Engineering

基　　金：国家重点基础研究发展计划(973计划)项目(2011CB706606)

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。The two-phase flow model of the oil-air lubrication system was built by flows theory. The state of oil-air two-phase flow after flowing through direct jet nozzle lyzed. For the inner ring jet nozzle, the influences of the key structure parameters, the the inclined pipeline and the nozzle exit structure to oil/air phase distribution in Fluent software based on two phase and inner ring jet nozzle were anaangle between the vertical pipe and beating were also analyzed. The simulation results show that the inner ring jet nozzle has better lubricating effect than the direct jet nozzle ,the necessary amounts of oil and air are less. Small angle between the vertical pipe and the inclined pipeline is conducive to maintaining the annular flow. The design of sudden expansion pipe alleviates the nonuniformity caused by oil/air fluctuation.

关 键 词：油气润滑 喷嘴 油气两相流 管道 

分 类 号：TH117.1[机械工程—机械设计及理论]