汽轮机轴向位移与胀差增大原因及处理.doc

汽轮机轴向位移与胀差增大原因及处理汽轮机轴向位移与胀差汽轮机轴向位移与胀差..........................................................................................................1一、汽轮机轴向位移增大的原因...................................................................................1二、汽轮机轴向位移增大的处理...................................................................................1三、汽机轴向位移测量失灵的运行对策.......................................................................1汽轮机的热膨胀和胀差..........................................................................................................2相關提問:.....................................................................................................................21、轴向位移和胀差的概念............................................................................................32、轴向位移和胀差产生的原因(影响机组胀差的因素)..........................................3使胀差向正值增大的主要因素简述如下:............................................................3使胀差向负值增大的主要原因:...........................................................................4正胀差-影响因素主要有:.................................................................................43、轴向位移和胀差的危害............................................................................................64、机组启动时胀差变化的分析与控制.........................................................................61、汽封供汽抽真空阶段。.....................................................................................72、暖机升速阶段。................................................................................................73、定速和并列带负荷阶段。.................................................................................75、汽轮机推力瓦温度的防控热转贴...........................................................................91润滑油系统异常..............................................................................................92轴向位移增大..................................................................................................93汽轮机单缸进汽...........................................................................................