核电汽轮机阀门性能诊断实践及改进
2018-09-13吴松林陈湛杨
吴松林 陈湛杨
【摘 要】介绍了我国某核电站M310汽轮机进汽阀工作原理和性能测试现状,结合汽轮机进汽阀门的主要故障模式,提出对当前汽轮机进汽阀进行系统在线性能测试的改进方案,研究将先进阀门诊断技术应用于对汽轮机进汽阀门的故障诊断、分析、事故预防、性能再鉴定以及预防性维护活动中,促进优化汽轮机进汽阀门预防性维修策略,以提高核电站汽轮机发电机组安全运行可靠性。
【关键词】汽轮机;主汽阀门;预防性维护
中图分类号: TK264.9 文献标识码: A 文章编号: 2095-2457(2018)14-0049-002
DOI:10.19694/j.cnki.issn2095-2457.2018.14.021
Diagnosis practice and improvement of the performance of nuclear steam turbine valve
WU Song-lin CHEN Zhan-yang
(Fuqing Nuclear Power Plant, Fuqing Fujian 350318, China)
【Abstract】This paper introduces the working principle and performance test status of the steam inlet valve of M310 steam turbine in a nuclear power station in our country. Combined with the main fault mode of the steam turbine inlet valve, an improved scheme for the on-line performance testing of the current steam turbine inlet valve is put forward, and the advanced valve diagnosis technology is applied to the steam turbine inlet valve. In order to improve the safety operation reliability of steam turbine generator set in nuclear power plant, the preventive maintenance strategy of steam turbine inlet valve is promoted in the activities of obstacle diagnosis, analysis, accident prevention, performance re identification and preventive maintenance.
【Key words】Steam turbine; Main steam valve; Preventive maintenance
0 引言
汽輪机在运行的过程中,汽轮机调节系统通过调节汽轮机进汽阀开度实现对汽轮发电机组转速、功率、频率、压力等动态指标进行控制,并对机组的转速超限、转速加速度超限、负荷变化速度及蒸汽需求等进行限制。汽轮机进汽阀作为汽轮机控制调节的执行机构,其工作性能必须足够可靠才能保证发电机组安全经济可靠运行,为此汽轮机进汽阀的性能测试和鉴定显得格外重要。汽轮机进汽阀的故障原因种类较多,故障原因的发现、诊断、解决、预防往往需要做大量研究工作,在实践过程中总结了各方面经验,并做了部分改进研究,以期提高汽轮机进汽阀门工作的可靠性。
1 汽轮机主汽阀工作原理简介
汽轮机调节系统控制中,汽机负荷控制逻辑通过目标负荷计算出阀门开度指令,控制系统通过模拟量输出卡件输出阀门开度指令电流信号至伺……
