摘要
为查找汽轮机凝汽器泄漏原因,对发生泄漏的凝汽器钛管周围的管进行涡流检测。结合2个典型的涡流阻抗信号,利用标准检测程序制作了标定曲线,可准确计算钛管减薄量。试验结果表明,除机械撞击、硬物划伤等容易造成凝汽器钛管泄漏外,支撑隔板安装的垂直度及每行的同心度以及机组起停产生的应力均可能造成钛管泄漏。
In order to find out the causes leading to leakage in condenser,an eddy current detection of tubes around the already leaked titanium tube in the condenser has been carried out. Combining with two typical eddy impedance signals,a calibration curve, which can accurately calculate the thickness reduction of titanium tubes, has been made by using the functions of standard detection procedure. Resuits of test show that ：in addition to the mechanical impact and hurt of hard matters are easily resulted in titanium tube leakage in the condenser,the perpendicularity in installation of supporting plates and the concentricity of every row also affect the mounting gaps between the supporting plates and the titanium tubes,resulting in leakage of titanium tubes due to impact damage between titanium tubes and supporting plates,as well as the stress produced in start - up and shutdown of the units.
出处
《热力发电》
CAS
北大核心
2010年第1期74-75,79,共3页
Thermal Power Generation
关键词
汽轮机
凝汽器
钛管
泄漏
缺陷
涡流检测
steam turbine
condenser
titanium tube
leakage
defect
eddy current detection
