曲轴滑动轴承烧蚀的相关问题解析 ※ Sicote Generator Set Markt

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Title : 曲轴滑动轴承烧蚀的相关问题解析

Click Count: 645 Add Time: 2010-11-30

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     曲轴滑动轴承烧蚀，俗称“烧瓦”。造成这一故障的主要原因是柴油机的机械负荷和热负荷过大、机油供给不足的情况下曲轴轴颈与轴瓦之间未能形成有效润滑油膜，导致曲轴轴颈与轴瓦直接摩擦。
　　１、曲轴烧蚀的具体原因
　　（１）机油品质差
　　ａ、机油品质低劣。选用的机油质量等级和粘度等级较低，或不同牌号机油进行掺兑使用，造成机油的使用性能达不到要求；机油长时间使用过程中混入了大量灰尘，以及因柴油机工作温度过高等使机油氧化变质。
　　ｂ、机油里混有水。水套裂缝或水套有砂眼气孔，使冷却水渗入机油里。
　　ｃ、机油变稀。由于部分柴油机喷油泵润滑采用压力润滑方式，一旦喷油泵与润滑油道密封失效，柴油进入润滑油道使柴油机润滑油稀释变质。
　　（２）机油容量不够、机油压力较低
　　ａ、机油容量不够。未按规定容量加足机油，使发电机组润滑机油流量不足，不能保证润滑油膜的形成。
　　ｂ、机油压力较低。由于机油压力较低，曲轴轴颈与轴瓦之间未形成润滑油膜。
　　ｃ、由于机油的清洁度较差，使润滑油道或油孔堵塞、曲轴轴颈与轴瓦之间缺机油或机油不足。