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檢查風機葉片損傷有哪些方法?

來源： | 發布日期：2022-12-02

答:離心風機葉片損傷的方法，最簡單而有效的辦法是肉眼觀察，在10倍以上的放大鏡下用肉眼檢查葉片有無裂紋及傷痕，如用這種方法檢査不出葉片的傷痕時，還可采用比色探傷、磁粉探傷、熒光粉探傷等方法檢査葉片。其中以比色法最方便，費用也少使用廣泛。
(1)著色探傷法:將 離心風機叶片擦净积垢后，将需要检查部位，涂上红色渗透液。渗透酒由 1%苏丹红溶解于 60%煤油、10%松节油、30%水和酸中酯混合液中。稍待片刻后，用清洁纱头擦清，再涂上白色显像液(5%锌白拌匀于 30%胶棉液，然后再加人20%苯、50%丙酮稀释),待干燥后，如有裂缝即会在白色底色上显示出明显的红色纹路。
(2)磁粉探伤法将风机转子或叶轮绕上白线，通人直流电使叶轮或转子产生磁场。各个叶片顶部成为一个磁极，然后涂上铁粉。如果叶片有裂纹，则在裂纹的缺口处产生两个不同的极性，因而将铁粉吸住。这样可查出受伤叶片的伤痕所在。
(3)荧光粉探伤将叶片涂上荧光粉，然后擦去。将转子或叶轮移动到暗室中察看，有裂纹处荧光粉擦不掉而会发光。
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