基于轴系对中数据的轴承载荷识别方法  

Bearing Load Identification Based on Shaft Alignment Measurements

作　　者：李燕勇 杨建刚[2] 董川 彭斌 

机构地区：[1]云南电力试验研究院(集团)有限公司电力研究院,昆明650217 [2]东南大学火电机组振动国家工程研究中心,南京210096

出　　处：《动力工程学报》2013年第12期932-935,共4页Journal of Chinese Society of Power Engineering

摘　　要：基于汽轮发电机组轴系对中检测数据,应用传递矩阵方法建立了轴承载荷识别模型,首先由对中数据识别轴承标高,然后由轴承标高计算轴承载荷.以某350MW汽轮发电机组为例进行了计算,分析了张口和高低差对轴承载荷的影响以及3种不同对中状态下的载荷分配.结果表明:该方法可有效地由轴系中心检测数据识别轴承标高和轴承载荷;理想对中状态下,各对轮处的张口和高低差为0;检修后低速盘车状态下,1号、2号轴承顶轴油压相近,2个轴承的载荷分配基本均匀;满负荷运转状态下,轴系振动稳定,消除了突发性不稳定振动现象.A bearing load identification model was established using transfer matrix method based on shaft alignment measurements of a turbo-generator unit, in which the bearing elevation was first identified with alignment data, and then the bearing load was calculated with the bearing elevation. Taking a 350 MW turbo-generator unit as an example, calculations were conducted so as to analyze the difference influence of coupling sag and gap on the bearing load, as well as to analyze the load distribution under three differenet alignment conditions. Results show that the bearing elevation and load can be identified with shaft align- ment measurements via this method; both the differences of coupling sag and gap are 0 under ideal align- ment status; bearings No. 1 and No. 2 have close jacking oil pressures during low-speed turning process af- ter maintenance, and their load distributions are basically uniform; the vibration of shafting is stable under full-load operation, in which case, abrupt unstable vibration is eliminated.

关 键 词：轴承 转子 汽轮发电机组 载荷 识别方法 

分 类 号：TM311[电气工程—电机]