我厂5L-40/8空压机在运行中,突然二级活塞卡住,导致一级安全阀起跳而紧急停车。经查是二级活塞堵板松脱后掉入缸中造成活塞与气缸座相撞,大部分碎渣掉进排气阀室。在抢修中检查,伸入缸体的气缸座凸面未见裂纹,故仅更换了活塞和活塞杆。安装后试车时,油压很快由原来的0.32～0.36MPa 升高到0.43MPa;当油温升到30℃时,油压 I plant 5L-40/8 air compressor in operation, a sudden two piston stuck, leading to a safety valve take-off and emergency stop. The investigation is a secondary piston plugging board loose into the cylinder after the piston and cylinder seat collided, most of the debris fell into the exhaust valve room. Check in the repair, extending into the cylinder block cylinder convex surface no crack, so only replaced the piston and piston rod. After installation test, the hydraulic pressure quickly increased from the original 0.32 ~ 0.36MPa to 0.43MPa; when the oil temperature rose to 30 ℃, the hydraulic