6GK1901-1BB30-0AB0
.對於軸承雜音，應在電動機運行中經常監聽。
監聽方法是：將螺絲刀一端頂住軸承安裝部位，另一端貼近耳朵，便可聽到軸承運轉聲。若軸承運轉正常，其聲音為連續而細小的"沙沙"聲，不會有忽高忽低的變化及金屬摩擦聲。
若出現以下幾種聲音，則為不正常現象:
(1)軸承運轉時有"吱吱"聲，這是金屬摩擦聲，一般為軸承缺油所致，應拆開軸承加注適量潤滑脂。
(2)若出現"唧哩"聲，這是滾珠轉動時發出的聲音，一般為潤滑脂幹涸或缺油引起，可加注適量油脂。
(3)若出現"喀喀"聲或"嘎吱"聲，則為軸承內滾珠不規則運動而產生的聲音，這是軸承內滾珠損壞或電動機長期不用，潤滑脂幹涸所致。
3.若傳動機構和被傳動機構發出連續而非忽高忽低的聲音，可分以下幾種情況處理。
(1)周期性"啪啪"聲，為皮帶接頭不平滑引起。
(2)周期性"咚咚"聲，為聯軸器或皮帶輪與軸間松動以及鍵或鍵槽磨損引起。
(3)不均勻的碰撞聲，為風葉碰撞風扇罩引起。
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