离心透平转子的动力学分析与试验  

Dynamic Analysis and Testing of Centrifugal Turbine Rotors

作　　者：申迎峰 袁玮玮 袁龙健 刘释杰 王晓奇 Ying-feng Shen;Wei-wei Yuan;Long-jian Yuan;Shi-jie Liu;Xiao-qi Wang(Shanghai Marine Diesel Engine Research Institute;Shanghai Marine Equipment Research Institute)

机构地区：[1]中国船舶集团有限公司第七一一研究所 [2]上海船舶设备研究所

出　　处：《风机技术》2024年第2期62-66,共5页Chinese Journal of Turbomachinery

基　　金：所发基金项目(Z2018Z2-012/006-LG)。

摘　　要：针对某离心式透平膨胀机转子,采用MADYN2000进行动力学建模,对高速轴进行了无阻尼临界转速分析与临界转速图谱分析,选定了轴承刚度范围。确定轴承结构后校验了轴承的动态特性,该轴系的阻尼临界转速满足API617设计要求,并用不平衡响应计算为叶顶密封间隙设计提供了依据。在机组试验过程中,可重复观察到显著的跨临界现象,并对试验期间出现的油膜涡动情况进行了剖析。达到额定转速后的轴承振动趋于良好,经停机拆解未发现叶顶密封有磨损痕迹。试验结果表明,离心透平转子的临界转速和轴承温度计算与试验结果基本吻合,转子动力学分析在新机组的开发过程中具有良好的指导意义。For a centrifugal turbine expander rotor,MADYN2000 was used for dynamic modeling,and undamped critical speed analysis and critical speed diagram analysis were performed on the high-speed shaft.The bearing stiffness range was selected.After determining the bearing structure,the dynamic characteristics of the bearing were verified.The damping critical speed of the shaft system met the design requirements of API617,and the calculation of unbalanced response provided a basis for the design of blade tip seal clearance.During the unit testing process,passing through lateral critical speed can be observed repeatedly,and the oil film whirl that occurred during the testing period has been analyzed.After reaching the rated speed,the bearing vibration tended to be good,and no signs of wear were found on the blade tip seal after shutdown and disassembly.The experimental results show that the critical speed and bearing temperature calculation of the centrifugal turbine rotor are basically consistent with the experimental results,and the rotor dynamics analysis has good guiding significance in the development process of new turbine.

关 键 词：离心透平 转子 动力学分析 试验 

分 类 号：TK05[动力工程及工程热物理] TB653[一般工业技术—制冷工程]