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柴油机主轴承孔是曲轴的支承孔,此孔系的同轴度精度对柴油机的性能及寿命有直接影响,所以在设计柴油机时把这一精度要求提得较高,从而给制造带来较大难度,尤其在中、大功率柴油机的制造中,更为突出。我厂生产的G8300中速船用柴油机功率为1250hp,生轴承孔的孔径为φ259H6,材料为HT20-40,其主轴承孔同轴度误差在全长4190mm内为0.04mm,高于一般同类型产品的技术要求。近年来我们在镗主轴
Diesel main bearing hole is the crankshaft bearing hole, the accuracy of the coaxiality of the hole system has a direct impact on the performance and life of the diesel engine, so when designing a diesel engine, this accuracy requirement should be raised to bring greater manufacturing Difficulty, especially in the manufacture of high-power diesel engines, more prominent. I plant production G8300 medium-speed marine diesel engine power of 1250hp, bearing hole diameter of φ259H6, the material is HT20-40, the main bearing hole coaxial error within the full length of 4190mm 0.04mm, higher than the average type of products Technical requirements. In recent years we have boring spindle