扇形腔多油垫静压推力轴承润滑性能速度特性  

Lubrication Performance and Velocity Characteristics of a Multi-oil-pad Hydrostatic Thrust Bearing with a Sector-shaped Cavity

作　　者：于晓东[1] 邱志新[1] 李欢欢[1] 谭力[1] 

机构地区：[1]哈尔滨理工大学机械动力工程学院,黑龙江哈尔滨150080

出　　处：《热能动力工程》2013年第3期296-300,328,共5页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金资助项目(51075106);哈尔滨市科技创新人才基金资助项目(2012RFQXG077);黑龙江省教育厅联合基金资助项目(12511086)

摘　　要：扇形腔多油垫静压推力轴承润滑性能受速度的显著影响,设计不当会引起润滑油膜破裂和干摩擦,严重时导致静压支承摩擦失效。针对此问题,运用流体动力学和润滑理论对油腔压力、油腔流量、油膜厚度等参数的速度特性进行数值分析,得到了速度对扇形腔多油垫静压推力轴承润滑参数的影响规律,避免静压支承摩擦失效的发生。研究结果表明:随着旋转工作台转速升高,惯性带油和离心力作用而甩出的润滑油油量增大,流出油腔的油流量增多,引起油腔压力下降,致使油膜厚度变薄,出现油膜破裂和干摩擦,导致静压支承摩擦失效。该研究为静压推力轴承的设计、润滑和实验提供基础数据,实现对静压推力轴承润滑性能速度特性的预测,达到减少经济损失的目的。The lubrication performance of a multi-oil-pad hydrostatic thrust bearing with a sector cavity is conspicuously influenced by the velocity and if it is designed improperly,the lubricating oil film may be fractured and dry friction may result and if worsened,the hydrostatic bearing may fail due to friction.In the light of such a problem,the fluid dynamics and lubrication theory were applied to numerically analyze the velocity characteristics of such parameters as the pressure,flow rate and oil film thickness in the oil cavity etc.As a result,the law of the velocity influencing the lubrication parameters of the multi-oil-pad hydrostatic thrust bearing with a sector-shaped cavity was obtained,thus making it possible to avoid the occurrence of such a failure.The research results show that with an increase of the rotating speed of the rotary work bench,the lubricating oil flow rate caused by the action of both inertia force and centrifugal force will also increase,therefore the oil flow rate going out from the oil cavity will increase and the pressure in the cavity will drop,resulting in a thinner oil film thickness and fracture of the oil film and causing dry friction with a failure of the hydrostatic bearing due to friction.The foregoing can offer basic data for design,lubrication and tests of a hydrostatic thrust bearing and realize a prediction of its lubrication performance and velocity characteristics,thus attaining the aim of reducing the economic losses.

关 键 词：扇形腔多油垫 静压推力轴承 润滑性能 速度特性 

分 类 号：TH133.3[机械工程—机械制造及自动化]