吊鉤旋轉現象
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吊鉤旋轉與以下因素有關:
(1)越是大型的起重機,其起升高度越高,即吊臂頂滑輪組和吊鉤間鋼絲繩越長,吊鉤旋轉的可能性越大;
(2)吊鉤鋼絲繩穿繞成單數匹配比雙數匹配易於令吊鉤旋轉,並且穿繞的綱絲繩匹配數少,吊鉤旋轉的可能性越大;
(3)單根鋼絲繩所承受的重量越大,吊鉤旋轉的可能性越大;
(4)吊鉤組件的外形尺寸及其滑輪的尺寸越小,吊鉤旋轉的可能性越大;
(5)操作吊機起落鉤的速度不平穩,特別是重物離地時,吊鉤旋轉的可能性增大。
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