特殊油膜结构对离心机过挠性临界转速的影响  

Effect of special oil film structure on centrifuge passing flexible critical speed

作　　者：尤劲[1] 聂玉光[1] 张小章[1] 

机构地区：[1]清华大学工程物理系,北京100084

出　　处：《清华大学学报（自然科学版）》2005年第3期389-391,共3页Journal of Tsinghua University(Science and Technology)

基　　金：清华大学博士生创新基金项目(052421001)

摘　　要：为了确定阻尼器油膜边界条件对离心机升速过程中的振动特性的影响,借鉴Muszynska油膜模型,对离心机阻尼器油膜边界进行了改造。通过有限体积数值计算对新结构可能对阻尼器油膜流场带来的影响进行了分析。设计制作出了一种新型油膜阻尼器并应用于超临界离心机实验,验证了其在离心机转子支承系统过挠性临界过程中对降低系统的振动和不稳定性的明显作用。过挠性临界过程中,阻尼器的振动振幅由15μm有效减小到了1μm。结果显示出特殊油膜结构在离心机阻尼器的设计中的有效性和重要研究价值。Special centrifuge damper oil film structures were designed using Muszynska's model to analyze the effect of the oil film structure on the centrifuge rotor-bearing system. The effect of the oil film structures on the pressure and velocity fields was analyzed numerically. One oil film structure was used in super-critical centrifuge experiments to prove its ability to reduce vibrations and instabilities in the centrifuge system. As the centrifuge passed through its critical speed, the damper vibration was greatly reduced from 15 μm to 1 μm. The result shows that special oil film structures can effectively reduce vibrations in centrifuge dampers.

关 键 词：转子 振动 阻尼器 稳定性 

分 类 号：TH133[机械工程—机械制造及自动化] O5[理学—物理]