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轴承加注润滑脂过多导致的电机转子不平衡

2024-06-21

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一台水泵振动异常,经诊断,原因为电机不平衡问题,为查明原因,用户把电机拆开检查,发现轴承腔溢出大量润滑脂,绕组甚至转子中都有许多,直接导致了转子不平衡。

很多时候维护人员对电机进行补脂时,通常不会了解轴承需要润滑多少,当润滑脂加注过多时将通过轴封部位进入电机内部,以下是避免上述情况的常规方法:

★使用振动分析仪、机械听诊器或超声波等工具,监测轴承润滑情况,根据监测情况,发现轴承润滑不足时进行适量加油。

★严格按照加油周期及加注量进行补脂。

★润滑脂嘴是防止过度润滑的好方法。当轴承腔内产生内部压力时,润滑脂嘴将使多余的油脂逸出,所以应保持润滑油嘴的畅通。

众所周知,过度润滑的轴承可能比润滑不足的轴承更常见,因此最佳做法是仅在需要时才进行补脂。

(来源:振动诊断与转子平衡)

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