橡胶O型圈阻尼器在高速旋转台上的应用研究  

Application of elastomer O-rings damper in high speed spin tester

作　　者：宣海军[1] 洪伟荣[1] 

机构地区：[1]浙江大学化工机械研究所,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2005年第12期1854-1857,共4页Journal of Zhejiang University：Engineering Science

摘　　要：为验证橡胶O型圈阻尼器(EORD)的减振有效性,在高速旋转试验台上研究EORD支承高速柔性悬臂转子系统的不平衡响应.试验转子从0逐渐加速到24 000 r/min,然后切断电源自然降速.记录转子升降速过程中的转速和振动信号.建立基于Timoshenko连续梁理论的转子有限单元分析模型,求解模态转速、模态振型和不平衡响应,用Kelvin-Voigt黏弹性线性模型表示橡胶O型圈的动态特性,试验和理论计算结果比较表明,不平衡响应试验值和理论值一致,转子越过一阶临界转速并升速到2倍临界转速以上稳定运行.EORD能有效抑制高速转子的不平衡响应,提高转子系统的稳定性.作为一种低成本洁净的阻尼元件,EORD具有优良的阻尼减振性能.To verify the damping performance of elastomer O-rings damper （EORD）, the unbalance response of a high speed overhung flexible rotor supported by EORD was investigated in a high-speed spin facility. The rotor speed was increased gradually over the range of 0-24000 r/min and decreased naturally with the power closed. The corresponding speed and vibration signals were recorded with the increasing or decreasing rotor speed. Finite element simulations based on Timoshenko beam theory were performed to analyze the mode frequencies, mode shapes and unbalance response of the rotor. The dynamic characteristic of the damper was modelled by using Kelvin-Voigt viscoelastic linear model. Experimental unbalance response investigations show that experimental data agree well with the theoretical values. The rotor is accelerated through first critical speed and stably operated beyond double critical speed. EORD can limit unbalance response and improve the stability of the high speed rotor. EORD has excellent damping capability as a cheap and clean damping component.

关 键 词：橡胶O型圈阻尼器 转子动力学 有限单元模型 不平衡响应 

分 类 号：TH133[机械工程—机械制造及自动化]