考虑叶轮气动效应的离心压缩机转子稳定性分析  

Rotordynamic Stability Analysis of Centrifugal Compressor with Impeller Aerodynamic Influence

作　　者：杨树华[1,2] 太兴宇[1] 孟继纲[1] 肖忠会 马志宏[1] 王晓放[2] 周慧[1] Shu-hua Yang;Xing-yu Tai;Ji-gang Meng;Zhong-hui Xiao;Zhi-hong Ma;Xiaofang Wang;Hui Zhou(Shenyang Blower Works Group Corporation;School of Energy and Power Engineering,Dalian University of Technology)

机构地区：[1]沈阳鼓风机集团股份有限公司 [2]大连理工大学能源与动力学院

出　　处：《风机技术》2021年第2期59-63,共5页Chinese Journal of Turbomachinery

基　　金：国家自然科学基金-联合基金项目1808214。

摘　　要：API 617标准中要求,离心压缩机产品(包括辅助设备)应确保其最短使用寿命为20年,不间断连续运转时间至少为5年。本文中的压缩机组高压缸转子在实际运行中发生了动力学失稳现象。通过分析,认为对于该机组的转子稳定性分析,应该考虑叶轮气动效应的影响,并发现考虑叶轮气动效应后的转子稳定性与实际运行情况一致,且不满足API 617的要求,为了改善该压缩机的转子稳定性,在叶轮口圈和平衡盘密封处添加阻旋栅,从分析结果看,该措施提高了转子的对数衰减率,满足API 617的要求。According to API 617 standard,the service life of centrifugal compressor products(including auxiliary equipment)shall be at least 20 years and the continuous operation time shall be at least 5 years.In this paper,the instability phenomenon occurs in a centrifugal compressor HP rotor.By analysis,the impeller aerodynamic effect should be included for the stability analysis of the centrifugal compressor,and the stability result as same as actual operating condition which does not meet API 617 standard with impeller effect.In order to improve the stability of the rotor,the swirl brake is used in impeller eye seal and piston seal.The results show that the solution of adding swirl brake improves the logarithmic decrement of rotor and meets the requirement of API 617 standard.

关 键 词：离心压缩机 转子稳定性 叶轮气动效应 阻旋栅 对数衰减率 

分 类 号：TH452[机械工程—机械制造及自动化] TK05[动力工程及工程热物理]