300MW汽轮机高、中压汽缸膨胀不畅的原因分析及改进  

Reason analysis and improvement for high and intermediate pressure steam cylinder halfway expansion of 300MW turbine

作　　者：张春 刘志刚 

机构地区：[1]大坝发电有限责任公司,青铜峡市751607

出　　处：《宁夏电力》2005年第C00期184-186,共3页Ningxia Electric Power

摘　　要：将300MW汽轮机组膨胀对轴承座和滑销系统的要求进行了叙述,针对国产N300MW-165/535/535汽轮机因缸体膨胀不畅而导致轴瓦冷态负荷分配不均,运行中瓦温过高,汽封出现磨损,内缸进汽部位产生变形、裂纹,暖机时间延长等问题,分析了产生缸体膨胀不畅的种种原因,并提出了消除滑销系统卡涩,改造轴承座底部基础台板润滑面,改进缸体与轴承座推拉结构,改进管道与缸体的连接方式等相应的技术措施。通过这些技术改进解决300MW汽轮机的膨胀不畅问题,达到汽缸膨胀符合机组正常运行的目的。Aiming at N300MW-165/535 turbine due to cylinder under expansion lead to bearing shell cold state distribute unevenly, high temperature of bearing shell, steam seal wearing, inner casing deformed, craft and long time warming. Analyzed the reason, put forward technology measures of erasing sliding pin, improving lubricating surface of pedestal bass, push and pull structure of cylinder and pedestal base, connection mode between pipe and cylinder.

关 键 词：轴承座 汽缸膨胀不畅 滑销系统 钢材蠕胀速度 Deva合金 

分 类 号：TK263.1[动力工程及工程热物理—动力机械及工程]