华电技术 ›› 2011, Vol. 33 ›› Issue (1): 50-52.

• 技术交流 • 上一篇    下一篇

给水泵汽轮机高、低压调阀频繁抖动的原因分析及解决措施

林春   

  1. 福建华电可门发电有限公司,福建连江350512
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-01-25 发布日期:2011-01-25

Reason analysis and treatment measures on frequent jitter of high pressure and low pressure regulating valves of small steam turbine

LIN Chun   

  1. Fujian Huadian Kemen Power Generation Corporation Limited, Lianjiang 350512, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-01-25 Published:2011-01-25

摘要: 介绍了福建华电可门发电有限公司一期给水泵汽轮机在高负荷运行阶段,高调阀开启、大量冷再蒸汽参与工作并且伴随有高/低压调阀大幅度频繁抖动的异常现象。分析认为故障原因为给水泵汽轮机高、低压调阀的重叠度设置偏大,按照给水泵汽轮机电液控制系统(MEH)装置生产商的推荐值修改重叠度后,机组可满负荷正常运行。

关键词: 给水泵汽轮机, 电液控制系统, 高, 低压调阀, 抖动, 重叠度

Abstract: In Fujian Huadian Kemen Power Generation Corporation Limited project phase I, when the unit operated under high load, the high pressure regulating valve of the small steam turbine was opened, a great quantity of cool reheating steam participated in working, and the high pressure regulating valve and low pressure regulating valve jittered frequently in large amplitude. According to analysis, it was considered that the fault reason is the setting of the overlap of high pressure regulating valve and the low pressure regulating valve of the small turbine tended to be larger. The degree of overlap had been modified in accordance with the value recommended by the manufacturer of the microelectrohydraulic control system devices, and the unit can operate normally in full load. 

Key words: small steam turbine, electro-hydraulic control system of small steam turbine, high pressure and low pressure regulating valves, jitter, degree of overlap