PISTON PIN FAILURE 求翻译和原因

dingkai2222 · 发表于 2011-8-6 07:50

The following happened on a 12 cylinder MAN B&W 48/60 Vee engine. Part of a diesel electric installation, a high oil mist alarm shut the engine down. As the engine came to a rest, a primary explosion lifted the crankcase relief valves and filled the machinery space with a white oil mist.
On investigation, it was found that the piston pin (gudgeon pin) had sheared in two. The piston cracked and a piece broke off around the circlip groove. The liner was badly scored and the piston pin bearing badly damaged.
The cause was established to be faulty stock material used in the manufacture of the piston pins. All pins manufactured from that stock were renewed.

This is the sheared piston pin. It looks as if it has been cut in two with a grinder!!

Scoring in the liner. This is the bit that got hot- you can see where it has turned blue!

Close up of the cracked piston and the fracture

davidzhu2008 · 发表于 2011-8-6 08:17

没奖励，这么一大篇的，没动力

dingkai2222 · 发表于 2011-8-6 11:18

回复 2# davidzhu2008

呵呵，怎么奖励啊，我不会操作啊

dingkai2222 · 发表于 2011-8-6 11:20

回复 2# davidzhu2008

As the engine came to a rest, a primary explosion lifted the crankcase relief valves and filled the machinery space with a white oil mist.
The piston cracked and a piece broke off around the circlip groove.
那帮忙弄一下这两句吧，比较少，有点看不明白

liyalin365 · 发表于 2011-8-6 15:51

很简单。
大体是说一台16缸48/60的V型机试车过程中发生机损事故，油雾浓度报警后自动停车，但曲拐箱依然爆炸弹开安全道门，机舱充满白色油雾。经调查，事故原因是活塞销断成两段，导致活塞碎裂，缸套拉伤，活塞销铜套损坏。更换所有活塞销，云云

dingkai2222 · 发表于 2011-8-6 22:37

回复 5# liyalin365

非常非常感谢，原来crankcase relief valves 是防爆门的意思啊，我说呢，怎么哪还有个安全阀呢

raulr · 发表于 2011-8-10 05:16

其实那个安全阀不就是在防爆门上面么，那一大坨凸起。。。。。。。

raulr · 发表于 2011-8-10 05:18

其实那个安全阀不就是在防爆门上面么，那一大坨凸起。。。。。。。

[轮机] PISTON PIN FAILURE 求翻译和原因