轴系对中偏差对单支撑轴系振动的影响  

Influence of Shaft Alignment Deviation on Vibration of Single-support Shafting

作　　者：刘伟珣 杨建刚[1] 沈德明 LIU Weixun;YANG Jiangang;SHEN Deming(National Engineering Research Center of Turbo-Generator Vibration,Southeast University,Nanjing 210096,China;Nanjing Sciyon Smart Technology Group Co.,Ltd.,Nanjing 211102,China;Jiangsu Key Laboratory of Thermal Process Intelligent Control,Nanjing 211102,China)

机构地区：[1]东南大学火电机组振动国家工程研究中心,南京210096 [2]南京科远智慧科技集团股份有限公司,南京211102 [3]江苏省热工过程智能控制重点试验室,南京211102

出　　处：《动力工程学报》2021年第5期400-403,419,共5页Journal of Chinese Society of Power Engineering

摘　　要：建立了单支撑轴系动力特性分析有限元模型,研究轴系对中偏差对单支撑轴系振动的影响。结果表明:轴系对中偏差会改变中间轴承载荷和油膜刚性,对振动传递特性产生影响;单支撑轴系出现的振动不完全表现在不平衡转子所在跨内;在轴系对中偏差情况下,低压转子不平衡量会在相邻高中压转子上激发起较大振动。The finite element model of single-support shafting was established to study the influence of shaft alignment deviation on the vibration of single-support shafting. Results show that the shaft alignment deviation would change the load of intermediate bearing and the rigidity of oil film, and then affect the vibration transmission characteristics. The vibration of single-support shafting is not completely reflected in the span of the unbalanced rotor. In the case of shafting alignment deviation, unbalance of the low-pressure rotor would stimulate large vibration on the adjacent high-pressure rotor.

关 键 词：单支撑 轴系对中 振动 平衡 有限元法 

分 类 号：TH113.1[机械工程—机械设计及理论]