公开(公告)号：US20140373541A1

公开(公告)日：2014-12-25

申请号：US14478648

申请日：2014-09-05

申请人： FUJI ELECTRIC CO., LTD.

发明人： Yoshifumi KATO

IPC分类号： F01D17/08 ,  F01K13/02 ,  F01K7/18 ,  F01D17/10

CPC分类号： F01D17/08 ,  F01D17/10 ,  F01D17/145 ,  F01D21/14 ,  F01K7/04 ,  F01K7/18 ,  F01K13/02 ,  F05D2220/31 ,  F05D2270/301

摘要： A safety operation method includes detecting a steam pressure inside a high-pressure casing of the high-pressure part and a steam pressure inside a low-pressure casing of the low-pressure part; obtaining a low-pressure casing limit pressure as a reference corresponding to a pressure of the high-pressure casing in each detection, on a basis of a pressure correlation line expressing a prescribed special relation between preset high-pressure casing pressure and low-pressure casing pressure of the extraction steam turbine; comparing the low-pressure casing limit pressure with the detected pressure of the low-pressure casing; and forcibly throttling an opening of the main steam control valve to reduce the flow rate of steam flowing into the high-pressure part, in a state in which the extraction control valves continue controlling an operation of the extraction steam pressure, when the detected pressure of the low-pressure casing is judged to be higher than the low-pressure casing limit pressure.

摘要翻译： 一种安全操作方法，包括检测高压部分的高压壳体内的蒸汽压力和低压部件的低压壳体内的蒸汽压力; 基于表示规定的预设高压套管压力和低压套管的特殊关系的压力相关线，在每次检测中获得低压套管极限压力作为对应于高压套管的压力的基准 抽汽汽轮机的压力; 将低压套管极限压力与低压套管的检测压力进行比较; 并且当检测到的压力达到检测压力时，在抽出控制阀继续控制提取蒸汽压力的操作的状态下，强制地节流主蒸汽控制阀的开口，以减少流入高压部分的蒸汽的流量 低压套管被判断为比低压套管极限压力高。