1) switch from single valve to sequence
单阀切顺序阀
2) single/sequential valve switching
单阀-顺序阀切换
1.
Aiming at an accident that single/sequential valve switching operation of steam turbine has caused power flutuation and power system oscillation, the reason of single/sequential valve switching operation and valve switching theory are introduced.
针对因汽轮机单阀与顺序阀切换造成功率波动、电力系统振荡的事故,介绍了汽轮机进行单阀-顺序阀切换的原因,通过对造成功率波动的原因分析,指出根据现场实际测量的阀门流量特性进行汽轮机调速系统参数设置是解决负荷波动的最根本办法,在现场条件不具备的情况下,选择合适的操作方式、切换时间和蒸汽参数也能很好的控制负荷波动。
3) single sequence valve
单阀顺序阀
1.
209 unit was briefly introduced,and focused on the parameter setting of single sequence valve in DEH.
介绍了上海新华DEH-ⅢA型数字电液控制系统在湖北华电黄石发电股份有限公司209号机组的运用情况,重点介绍了DEH中单阀顺序阀的参数设置。
4) priority valve check valve
压力控制顺序阀单向阀
5) sequence valve
顺序阀
1.
Analysis of high temperature of bearing liners for 600 MW steam turbines in sequence valve operation modes;
顺序阀运行方式下600 MW汽轮机瓦温偏高分析
2.
Analysis of sequence valve control mode of 600MW supercritical steam turbine
600MW超临界汽轮机顺序阀控制方式优化
3.
It is described that the two 600MW turbine units could not be switched to sequence valve control mode and had been always running at single valve mode because of the problems of the turbine structure,installation and operation,and therefore,the efficiency of the units was at depressed level.
叙述了两台600MW机组由于汽机结构、安装、运行方面的问题在单阀切顺序阀运行时一直不很顺利,从而致使机组效率没有得到最大程度发挥的事例。
6) sequencing valve
顺序阀
1.
The load perturbation of both of the turbines is large during the course of switch between single valve and sequencing valve,which had passive influence on the safe operation of units.
1、2号汽轮机在单阀-顺序阀切换过程中机组负荷扰动较大,对机组的安全运行产生了不利影响。
2.
This paper introduces the anomalous phenomenon that occured after adopting sequencing valve steam distribntion mode instead of single valve mode,and based on the analysis,puts forward a appropriate solution.
介绍了国产600 MW汽轮机单阀改顺序阀运行后遇到的异常现象,根据异常现象分析原因,并制定出相应的解决方案。
3.
The anomalous phenomenon occurred after adopting sequencing valve steam distribution mode instead of single valve mode in 2×600 MW supercritical turbine of Guohua Taicang Power Generation Co.
介绍了国华太仓2台600 MW超临界汽轮机单阀切顺序阀运行后遇到的异常现象,根据异常现象分析原因,提出了高压调节汽门顺序阀控制管理的策略和解决方案。
补充资料：顺序阀的工作原理
顺序阀是依靠气路中压力的作用而控制执行元件按顺序动作的压力控制阀，如图1所示，它根据弹簧的预压缩量来控制其开启压力。当输入压力达到或超过开启压力时，顶开弹簧，于是户到A才有输出；反之A无输出。
图1、顺序阀工作原理图 (a)关闭状态；(b)开启状态
顺序阀一般很少单独使用，往往与单向阀配合在一起，构成单向顺序阀。图2所示为单向JI匝序阀的工作原理图。当压缩空气由左端进入阀腔后，作用于活塞3上的气压力超过压缩弹簧3上的力时，将活塞顶起，压缩空气从户经A输出，见图2(a)，此时单向阀4在压差力及弹簧力的作用下处于关闭状态。反向流动时，输入侧变成排气口，输出侧压力将顶开单向阀4由O口排气，见图2(b) 。
调节旋钮就可改变单向顺序阀的开启压力，以便在不同的开启压力下，控制执行元件的顺序动作。
图2、单向顺序阀工作原理图 (a)关闭状态；(b)开启状态
1-调节手柄；2-弹簧；3-活塞；4-单向阀
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条