基于微极性流体润滑的有限长动载轴承特性研究  

PERFORMANCE OF DYNAMICALLY LOADED JOURNAL BEARINGS LUBRICATED WITH MICRO-POLAR FLUIDS

作　　者：王晓力[1] 刘伟[1] 朱克勤[2] 

机构地区：[1]北京理工大学机械与车辆工程学院,北京100081 [2]清华大学工程力学系,北京100084

出　　处：《机械工程学报》2004年第10期35-38,共4页Journal of Mechanical Engineering

基　　金：博士学科点专向科研基金资助项目(2000000310)

摘　　要：基于微极性流体模型对有限长动载轴承的润滑性能进行了数值模拟。推导了动载情形下微极性流体润滑的Reynolds方程,比较了牛顿流体和微极性流体对轴承的油膜压力、最小油膜厚度和端泄流量所产生的不同影响。结果表明:微极性流体使得动载轴承的油膜压力明显提高,油膜厚度明显增大,而端泄流量则有所降低。Based on the theory of micropolar fluids, the performance of finite dynamically-loaded journal bearings is numerically studied. The Reynolds equation for the micropolar fluids under dynamic loads is derived. Comparisons are made between the Newtonian fluids and the micropolar fluids for the effects on the oil film pressure, the minimum oil film thickness and the side leakage flow. The results show that the micropolar fluids yield an obvious increase in the oil film pressure and the oil film thickness, but a decrease in the side leakage flow.

关 键 词：动载 轴承 微极性流体 润滑特性 

分 类 号：TH113[机械工程—机械设计及理论]