动静压混合气体润滑轴承动态稳定性实验研究  

Experimental Research on Hydrostatic-dynamic Hybrid Gas Lubrication Bearings Dynamic Stability

作　　者：陈策[1] 杨金福[1] 聂超群[1] 

机构地区：[1]中科院工程热物理研究所

出　　处：《润滑与密封》2007年第12期30-35,共6页Lubrication Engineering

摘　　要：对动静压混合气体润滑轴承进行了动态稳定性试验。通过实验呈现了气体润滑轴承-转子系统中的气膜涡动和混沌振动现象,分析了动态失稳过程中,分叉、混沌等非线性特征与动态稳定性的关联性。结果表明,系统是由周期1的同频涡动开始,气膜涡动导致倍周期分叉,而进入周期2运动形式;随着振动加剧,系统通过时间很短的周期3运动进入混沌;利用混沌振动的"有界"性质,可以有效控制振幅,提高稳定性。A dynamic stability experiment on hydrostatic-dynamic hybrid gas lubrication bearings was presented. Gas whirl and chaos in gas bearing and rotor system was illuminated. Some nonlinear phenomena in dynamic instability such as bifurcation and chaos were analyzed as well as their associations with dynamic stability. The result shows that the process from linear stability to nonlinear instabilit~ starts from period 1 st synchronous whirl, and follows by period 2nd because of double-period bifurcation caused by gas whirl,then falls into period 3rd with deterioration of vibration, and finally enters chaos rapidly. The effective vibration control and enhanced stability could be achieved based on the property of ＂bound ness＂ of chaos vibration.

关 键 词：动静压混合 气体润滑轴承 动态稳定性 

分 类 号：TH117[机械工程—机械设计及理论]