文中阐述了轴承疲劳磁性报警装置的结构原理及有关计算方法。用41套7208轴承进行了试验,其结果是报警判断出疲劳破坏36套(占疲劳损坏轴承总数的87.8%),30次有效报警中有24次判断出轴承疲劳(占有效报警次数的80%)。疲劳轴承中最小剥落面积0.5毫米~2,深度约0.1毫米。 In this paper, the structural principle of bearing fatigue magnetic alarm device and the related calculation method are described. With 41 sets of 7208 bearings were tested, the result is the alarm to determine the fatigue damage 36 sets (accounting for 87.8% of the total number of fatigue damage bearings), 30 times the effective alarm in 24 times to determine the bearing fatigue (accounting for 80% ). Fatigue bearing the smallest flaking area of ​​0.5 mm ~ 2, a depth of about 0.1 mm.