300MW汽轮发电机组推力瓦非工作面温度偏高原因分析及处理  

Cause Analysis and Treatment of High Temperature on Non-working Face of Thrust Pad in a 300MW Turbo-Generator Set

作　　者：何冬辉 李杨[2] 叶振起 He Donghui;Li Yang;Ye Zhenqi(Liaoning Dongke Electric Power Co.,Ltd.,Shenyang 110006,China;Harbin Turbine Co.,Ltd.,Harbin 150040,China)

机构地区：[1]辽宁东科电力有限公司,沈阳110006 [2]哈尔滨汽轮机厂有限责任公司,哈尔滨150040

出　　处：《发电设备》2019年第1期56-60,共5页Power Equipment

摘　　要：针对某300MW汽轮发电机组推力瓦非工作面温度异常升高、轴向负位移增大的现象,结合各种试验工况,并基于对汽轮机转子结构和受力及推力瓦结构特点的分析,得出根本原因是汽轮机轴向负推力增大。采取减少平衡活塞腔室至高压缸排汽量的方法,可使改造后机组带满负荷时推力瓦非工作面温度稳定在80℃左右。Aiming at the problem that high temperature and negative axial displacement occurring in non-working face of thrust pad in a 300 MW steam turbo-generator set,a number of tests were conducted under different conditions,based on structural analysis of the turbine rotor and considering the structural features of the thrust pad,following which,the problem was found to be caused by the increase of negative axial thrust.The method of reducing the leakage from balance piston chamber to high pressure cylinder finally was adopted.The non-working face temperature of the thrust pad is now stabilized at about 80℃after retrofit.

关 键 词：汽轮发电机组 推力瓦 平衡活塞 轴向推力 

分 类 号：TK263.6[动力工程及工程热物理—动力机械及工程]