摘要
透平油含水量的准确测量对指导电厂汽轮机安全经济运行具有重要意义。提出了采用微波谐振腔微扰法连续测量透平油含水量的方法,给出了含有微量水分透平油的等效介电常数的计算式,导出了透平油含水率与谐振器频偏之间的关系,设计了适用于透平油微水含量连续测量的谐振器及测量系统,其测量系统结构简单,可实现透平油含水量的在线连续测量。可以通过选择高品质因数工作模式,提高系统对腔体失谐的检测灵敏度及采用低热胀材料和特殊谐振器端头结构的办法来提高测量精度。该方法可分辨出透平油中十万分之一的含水率。
The accurate measurement of water content in the turbine oil has great significant for guiding steam turbine safety and economy running. A method of the online measurement of the water content in the turbine oil based on microwave resonant cavity perturbation is presented in this paper. The author deduced the formula of the volume proportion of water content in turbine oil, the resonant cavity and the measuring system which were applied to on-line measurement was designed. The measuring system of this method is simple. The precision of measurement can be improved by selecting work pattern with high quality factor, advancing the measurement precision of the relative frequency deflection and adopting the lower thermal expansion coefficient material and the especial resonant cavity configuration. Ten ppm water content in turbine oil can be distinguished by this method.
出处
《汽轮机技术》
北大核心
2003年第5期273-275,共3页
Turbine Technology
关键词
透平油
含水量
在线测量
谐振腔微扰
turbine oil
water content
on-line measurement
cavity perturbation
