论文部分内容阅读
农村中普遍使用的S195型柴油机经修理后,有的工作还不到300小时,就连续发生折断曲轴的现象,并且断裂的位置都在连杆轴颈,机手们为之束手无策。 其实,只要认真地检查一遍,就会发现活塞顶部有被气门头撞击的凹坑,气门推杆也发生弯曲,这说明气门过早开或过晚关。而气门过早开或过晚关,是由配气正时齿轮决定的。拆开正时齿轮室盖,仔细检查各齿轮配对记号时,发现新装配的凸轮轴齿轮打的记号不对,标准记号位置应从键槽顶端的第1个齿开始,包括第1个齿,顺时针方向
After the repair of the S195 diesel engine, which is commonly used in rural areas, some of them did not break the crankshaft continuously in less than 300 hours, and the fracture occurred on the connecting rod journal and the crew was at a loss what to do. In fact, as long as a careful examination again, you will find the top of the piston has been hit by the valve head of the pit, valve push rod also bent, indicating that the valve prematurely open or too late. The valve prematurely open or too close, is determined by the timing gear with gas. Open the timing gear chamber cover, a careful examination of the gear pair marks, the newly installed camshaft gear marked wrong, standard mark position from the top of the keyway first tooth, including the first tooth, clockwise