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电动式液压升降货梯轴承受到污染,污染会使轴承过早损坏.污染是指轴承的内部,如灰尘和金属碎屑.主要原因包括:轴承包装在使用前过早开启,造成污染;安装时工作环境不干净,造成污染;轴承工作环境不干净,工作介质受到污染.建议轴承在使用前不应拆卸.在安装过程中清洁安装环境,并清洗要使用的轴承.加强轴承密封装置.

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电动式液压升降货梯机械系统、油缸、液压泵、液压阀及管路问题。可能是电机转子弯曲严重磨损或轴承损坏，造成电机扫气室噪音。当电源电压为额定电压的85%以内，接触器E芯端环断裂，磁轭和电枢接触歪斜、有灰尘或生锈，接触不好的时候会导致接触器噪声"嗡嗡".