【摘要】 薄层活化法是一种无需拆卸系统动态定量检测指定零部件磨损的方法。该方法具有灵敏度高、可在线检测和放射性低等特点。本文介绍了薄层活化法的原理和相关技术内容,并将该技术应用于涡轮机叶片的磨损离线和在线测量,实现了离线监测三种涡轮机叶片和在线两种涡轮机叶片指定部位的汽蚀磨损状况,给出了试验的详细过程,经53 h试验,被测叶片的实测磨损量与称重法获得的结果一致,测量平均值标准误差为±0.2μm。更多还原

【Abstract】 The thin-layer activation method is a kind of nuclear method for the dynamic and qualitative measurement of wear-and-tear of specified parts and components with no need for system disassembly.This method features high sensitivity,an ability to perform on-line detection,and low radioactivity etc.The working principles and relevant techniques of the thin-layer activation method are described.Its application to the on-line and off-line measurement of wear of turbine blades has made it possible to realize an off-line monitoring of cavitation-caused wear for three kinds of turbine blades and an on-line monitoring of same at specified locations for two kinds of turbine blades.A detailed test and detection procedure is given.Through tests lasting 53 hours,the worn-out mass actually measured of the blades is identical to that obtained by using a weighting method.The standard error of average measured values is ±0.2 μm.更多还原