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陕西省路桥工程总公司使用的两台宝马公司产MPH-100型稳定土拌和机,配装有美国DETROIT 8V-71系列二行程柴油机。新机使用4年后,其中的一台工作时温度高、噪声大、机油压力低、排气管冒蓝烟和曲轴箱通气管冒黑烟,并且向外喷机油,无法正常使用。拆检发现:活塞环断裂;活塞环槽严重磨损,配合间隙变大;活塞和缸套拉伤。
Shaanxi Road and Bridge Engineering Corporation used two BMW production MPH-100 Stabilized soil mixing machine, equipped with the United States DETROIT 8V-71 series two-stroke diesel engine. Four years after the new machine is used, one of the working hours is characterized by high temperature, high noise, low oil pressure, blue smoke on the exhaust pipe and black smoke on the crankcase ventilation pipe, and the oil is sprayed outwards and can not be used normally. Disassembly found: the piston ring fracture; piston ring groove serious wear, with the gap becomes larger; piston and cylinder strain.