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一、事故经过情况1987年5月1日下午,福建省某冷库一台4AV12.5压缩机在起动完毕,投入正常运行约7分钟时,突然发生严重金属敲击声。声音很大,距机房30米外均可听到,当时该机作为高压级,另一台4AV12.5和一台8AV 12.5作为低压级,组成两级压缩运行。敲击声发生时,中间冷却器液面正常,压缩机油压正常,没有发现其它异常现象。由于敲击声强烈,当班师傅立即切断该机电源,随后立即切断低压级压缩机电源,按紧急停车处理。第二天拆卸机器检查,打开气缸盖后,活塞顶部和气缸套上部均正常,曾以为没有大问题。但盘车时机器转不动,进一步打开曲轴箱,发现第三缸(以靠电机侧为第一缸)连杆扭曲,活塞在油环以下完金破碎,气缸裙部有6×2.5cm的弓形缺口。第
First, the accident situation May 1, 1987 afternoon, Fujian Province, a refrigerator 4AV12.5 compressor in the start is completed, put into normal operation for about 7 minutes, a sudden severe metal percussion sound. Loud voice, 30 meters away from the machine room can be heard when the aircraft as a high pressure level, another 4AV12.5 and a 8AV 12.5 as a low pressure level, composed of two compression operation. Percussion sound occurs, the normal level of the intercooler, compressor oil pressure is normal, did not find any other anomalies. Due to strong percussion, immediately master cut off the machine power, then immediately cut off the low-voltage compressor power supply, press the emergency shutdown. The next day, remove the machine check, open the cylinder head, the top of the piston and cylinder liner are normal, had no major problems. However, when turning the machine does not move, and further open the crankcase and found that the third cylinder (to the motor side of the first cylinder) link twist, the piston in the oil ring below the end of the broken gold, the cylinder skirt 6 × 2.5cm Bow gap. No.