在修筑南疆铁路时,我们使用了一批TY220型推土机,其发动机的功率为162 kW,转速 1800 r/min,配件已国产化。这批推土机在使用过程中,每年都发生好几次曲轴断裂的大故障。一根曲轴价格高达15000元左右,有时还买不到,因而每次断轴事故,既加大了修理成本,也影响了施工进度。现将有关曲轴断裂事故的原因介绍如下。 In building the southern Xinjiang Railway, we used a number of TY220-type bulldozers, the engine power of 162 kW, speed 1800 r / min, accessories have been made. This batch of bulldozers in use, several times a year crankshaft failure occurred major fault. A crankshaft price of up to 15,000 yuan, and sometimes can not buy, so each shaft accident, both increased repair costs, but also affected the construction progress. Now the reason for the crankshaft rupture is as follows.