某些起重机在出厂试验时,不吊重或吊重作回转时,回转支承发出如同“炒豆”般的声响。声响大小不尽一致,严重时在试车区几十米远处尚能清晰听到。据了解,其它厂的起重机也出现过类似现象。异常声响给操作者带来不安全、不舒适的感觉,因此有排除的必要。 When some cranes are not in the factory test, when they are not lifting or lifting, the slewing bearing emits a sound like “fried beans”. The sound is not exactly the same size, and it can still be clearly heard in the test area tens of meters away. It is understood that other factories have seen similar phenomena. Abnormal sounds give the operator an unsafe, uncomfortable feeling and it is therefore necessary to eliminate it.