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每台东风4型内燃机车,有六只410牵引电动机。这些电机厂修分解检查时,发现机座φ600毫米、φ630毫米孔有偏磨局部超差。按厂修要求,超差量允许为φ600~(+0.11)毫米、φ630~(+0.11)毫米,而实际上局部偏磨超差为φ600~(0.13-0.30)毫米,φ630~(+0.12-0.28)毫米,往往因机座孔径超差过多,而采取扩大机座孔径尺寸、报废前后端盖的方法来解决。从我们对六台份机车的36只电机的检查结果看,其中有26只电机机座孔偏磨局部超差,超差率为72.22％。如果以全年修理120台车计算,采用等级修理全年需
Each Dongfeng 4 diesel locomotive, there are six 410 traction motor. Repair of these electrical plant repair solution, found that the base φ600 mm, φ630 mm hole partial wear partial ultra-poor. According to the factory repair requirements, the allowance for ultra-tolerance is φ600 ~ (+0.11) mm and φ630 ~ (+0.11) mm, while the actual partial wear tolerance is φ600 ~ (0.13-0.30) mm and φ630 ~ (+ 0.28) mm, often due to excessive seat hole tolerance, and to expand the base frame size, scrapped before and after the end cover method to solve. From our inspection of the 36 electric motors of the six locomotives, 26 of the motor housings deviated into partial over-wear, with an overrun rate of 72.22%. If the annual repair of 120 cars, the use of grade required to repair the entire year