中小型汽轮机低真空供热的安全性分析  

Analysis of Safety for Small-middle Steam Turbine Supplying Heat with Low Vacuum

作　　者：曹丽华[1] 李勇[1] 栾忠兴 

机构地区：[1]东北电力学院动力系,吉林132012 [2]营口第一热电厂,营口115000

出　　处：《汽轮机技术》2004年第5期330-332,共3页Turbine Technology

摘　　要：中小型汽轮机低真空供热可以节约能源,但对汽轮机本身的安全性会产生一定的影响。计算并讨论了汽轮机轴向推力随背压的变化特性;并利用该分析结果对营口第一热电厂CC12型汽轮机进行了低真空改造,分析了轴向推力、凝汽器冷却管膨胀量、汽缸膨胀量等的变化对汽轮机安全性的影响。该厂低真空供热后,机组运行良好。The way of supplying heat with low vacuum of small-middle steam turbine can save energy sources, but it will have effect on safety of steam turbine itself. In this paper, the changing characteristic of thrust is calculated and discussed. Then, the CC12 type steam turbine of Yingkou first cogeneration plant is rebuilt on base of this conclusion. The effect of expanded degree of cooling water tube and cylinder on safety of steam turbine is analyzed. The operation safety is well in practice while steam turbine supplies heat with low vacuum.

关 键 词：汽轮机 低真空供热 轴向推力 凝汽器 汽缸膨胀 变化特性 节约能源 机组运行 热电厂 冷却管 

分 类 号：TK264[动力工程及工程热物理—动力机械及工程] TM621[电气工程—电力系统及自动化]