CLG888型装载机冷却液流入机油箱怎么处理?

2025-03-16 02:26:40
推荐回答(1个)
回答1:

1台CLG888型装载机作业中暖通水管出现破裂,发现后即补充约15L冷却水。试机发现,发动机下排气很大。停机检查发动机外观正常,取下机油口盖发现盖上有水,检查油面高度已经超出机油尺上线约25mm,表明有冷却液流入机油油底壳。
排放机油时最先流出来5L左右清澈的冷却液。拆下汽缸盖检查,发现发动机V缸呈现圆周性严重拉伤(短时间过热一般呈现局部拉伤,圆周性拉伤一般是因为长时间过热)。拆下V缸活塞,发现活塞裙部严重拉伤,汽缸套外壁漏水严重,但连杆及连杆瓦无异常。拆下V缸活塞冷却喷嘴检查,在冷却喷嘴油道内发现1段长约20mm、直径5mm的密封圈的断节,该断节刚巧插在油道内,堵塞了V缸活塞冷却喷嘴的油道。
拆下V缸缸套检查,发现缸套密封圈已被高温烧蚀,局部密封圈环槽因高温变蓝。为了进一步检查其他缸套密封圈有无高温烧蚀现象,拆下相邻的VI缸缸套检查,结果缸套及密封圈无异常。
分析故障的原因如下:在保养更换机油滤油器时,其后侧的密封圈没有放置于环槽内,或滤油器出厂时密封圈没有安装到位,安装滤油器时不慎将密封圈挤断,随后此断节进入发动机油道,滞留在V缸活塞冷却喷嘴机油入口处,堵住油道。由于V缸活塞得不到有效冷却(仅靠飞溅的机油来冷却是不够的),造成活塞及活塞裙部膨胀,将缸套和活塞呈圆周性拉伤。
当发动机V缸出现拉缸故障后,缸套表面粗糙度遭到破坏,活塞和汽缸套摩擦后便产生高温,将汽缸套密封圈烧蚀。密封圈损坏后,冷却液便流入机油箱。
对汽缸套、活塞进行相应的维修和处理,更换滤油器和汽缸套密封圈后装复试机,发动机恢复正常。

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