255MW燃气-蒸汽联合循环机组轴封间隙测量及故障处理  

Fault Analysis and Disposal of a 255MW Gas-Steam Combined Cycle Unit through Shaft Seal Clearance Measurement

作　　者：桑泉巍 刘振祥[1] 田新启[1] 任伟 Sang Quanwei;Liu Zhenxiang;Tian Xinqi;Ren Wei(National Engineering Research Center of Turbo-Generator Vibration, Southeast University, Nanjing210096, China;Huadian Jurong Power Plant, Zhenjiang 212000, Jiangsu Province, 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]华电句容电厂,江苏镇江212000

出　　处：《发电设备》2018年第5期353-356,共4页Power Equipment

摘　　要：针对某电厂2台255MW燃气-蒸汽机组的2号汽轮机出现轴封间隙过小的现象,经标高测试后分析发现该机组轴承座存在基础下沉和沉降不均的问题,提出了适当增大低压缸轴封上部间隙预留量的调整措施,为新机组安装提供了参考依据。To solve the problem of too small shaft seal clearance existing in the No.2 turbine of a 2×255 MW gas-steam unit, caused by a certain degree of foundation sinking and differential settlement in the bearing block, found by measuring relevant elevations, corresponding adjustment measures were proposed, such as appropriately increasing the upper clearance of shaft seal in the low-pressure cylinder, etc. This may serve as a reference for installation of new gas-steam combined cycle units.

关 键 词：燃气-蒸汽机组 轴封间隙 标高测试 基础下沉 

分 类 号：TK268[动力工程及工程热物理—动力机械及工程]