高速气体轴承—转子系统转速飞升故障的试验  

Experimental Study on Speed Rise Faults of a High-speed Aerostatic Bearing-rotor System

作　　者：付忠广[1] 边技超[1] 杨金福[2] 韩东江[2] 王正威[1] 于明涛[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206 [2]中国科学院工程热物理研究所,北京100190

出　　处：《噪声与振动控制》2015年第4期124-128,共5页Noise and Vibration Control

基　　金：国家科技支撑计划项目(2012BAA11B02);中央高校基本科研业务费专项资金资助(13XS10);中央高校基本科研业务费专项资金项目(2014ZZD04)

摘　　要：为了分析研究气体轴承—转子系统的转速飞升故障,在基于气体静压径向—止推联合轴承支承的高速透平发电机试验台上开展试验研究。采用时间三维谱图、轴心轨迹、频谱分析及分岔图等非线性振动测试及分析方法,给出转速飞升故障的特征及其发生条件,并研究轴承供气压力及驱动气流量特性对转速飞升的影响。试验结果表明,在一定范围内,提高轴承供气压力能够推迟转速飞升,在转速飞升过程中,减小驱动气输入流量能够提前终止转速飞升,提高轴承—转子系统稳定性。In order to analyze speed rise faults of a gas bearing - rotor system, an experimental study on a high speed turbine generator was completed. The rotor was supported by aerostatic radial-thrust bearings. Using the methods of time- frequency-amplitude waterfall diagrams, shaft trajectory, frequency spectrum character analysis and bifurcation diagram, the typical features of the fault of the speed rise and its occurrence conditions were obtained. In addition, the influence of beating gas supply pressure and flow rate characteristic on the speed rise was studied. Experimental results show that within a certain range, higher bearing gas supply pressure can put off the occurrence of the speed rise. In the process of speed rising, reduction of the drive-gas flow rate can terminate the speed rise earlier and raise the stability of the gas bearing rotor system.

关 键 词：振动与波 气体轴承—转子系统 转速飞升 轴心轨迹 分岔图 三维谱图 

分 类 号：TH113.1[机械工程—机械设计及理论] TH113.2