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一、捣缸 捣缸是重大的机械事故,轻则使活塞、连杆、缸套损坏,重则将损坏缸体、曲轴等零件,使整台发动机报废。发生捣缸前柴油机工作不正常,无力、冒黑烟,并有严重的敲缸声,发生此现象应立即停车检查。 1.原因 (1)因连杆螺栓折断引起捣缸。连杆螺栓的上紧力矩过大时,螺栓拉伸变形,因强度降低而折断;连杆螺栓的上紧力矩过小,轴瓦安装不到位,连杆螺栓产生很大的附加应力,并受冲击载荷而折断。 (2)因活塞销折断引起的捣缸。由于磨损使活塞销与活塞、连杆铜套的配合间隙变大,发动
First, Daoxing Daotang is a major mechanical accident, ranging from the piston, connecting rod, cylinder liner damage, will damage the cylinder, crankshaft and other parts, so that the entire engine scrapped. Dumping cylinder before the diesel engine is not working properly, weakness, black smoke, and serious knocking cylinder sound, this phenomenon should immediately stop inspection. 1. Reason (1) Breaking cylinder caused by connecting rod bolt. Connecting rod bolt tightening torque is too large, the bolt tensile deformation, due to lower strength and broken; connecting rod bolt tightening torque is too small, the bearing is not installed, connecting rod bolt has a lot of additional stress, and by the impact Loaded and broken. (2) because of the piston pin broken cylinder. Due to wear so that the piston pin and connecting rod copper sleeve with the larger gap, start