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不久前,我厂一台氮氢气体庄缩机发生连杆拉断、滑道烧坏、机壳打烂的事故。事故发后生,操作工和修理工都不承担责任,各执一理,争论不休。我们及时组织设备科有关工程技术人员,抓住第一手资料,做好跟踪调查,分析如下。 损坏情况:4号压缩机低压侧平行列连杆中部折断,并严重弯曲,断痕表面全新,曲轴瓦无损,十字头摩擦面呈微蓝色,十字头与滑道抱死,摩擦面拉毛严重,局部出现凸凹相对一毫米之多。 调查情况;据操作工说,事故前2小时发现油压偏低,在0.05Mpa左右(正常油压为0.2Mpa),但误认为是压力表不准;事故发生前40分钟检查仍未发现异常现象,润滑油亦无变质、变色迹象。 分析结果:拆机检查油泵进口滤网几乎全被堵死,油泵以后油路无堵塞现象。此机油路为:油泵进口过滤网→机油泵→曲轴→连杆→十字头销→十字头外部油槽喷入滑道。如果油压太低,在润滑油流到曲轴和十字
Not long ago, I plant a nitrogen and hydrogen gas compressor rod broke off, chute burnout, chassis crash accident. After the accident, students and mechanics do not assume responsibility, they all take the same arguments. We promptly organized the engineering and technical personnel of the equipment department to seize the first-hand information and follow up the investigation as follows. Damage: Compressor 4 side of the low-pressure parallel to the middle column connecting rod broken and severely bent, broken surface new, non-destructive crankshaft, crosshead friction surface was blue, crosshead and slide lock, friction surface hairs serious , The local emergence of convex and concave relative to a millimeter. Investigate the situation; According to the operator said that two hours before the accident was found low oil pressure, about 0.05Mpa (normal pressure of 0.2Mpa), but mistaken for the pressure gauge is not allowed; 40 minutes before the accident did not find abnormalities Phenomenon, no deterioration of oil, signs of discoloration. Analysis results: disassemble the pump inlet filter is almost all blocked, the oil pump after the blockage phenomenon. This machine oil path is: oil pump inlet filter → oil pump → crankshaft → connecting rod → crosshead pin → cross-head external tank spray into the slide. If the oil pressure is too low, the oil flows to the crankshaft and the cross