英格索兰公司生产的SD180型振动压路机采用康明斯6CTA8.3-7型发动机,在运转2 000h后,发动机与前支架连接的4个M12固定螺栓频繁断裂。 起初以为是螺栓强度不够,但改成高强度螺栓后依然如故,且断裂周期越来越短,大约使用10h就断裂。于是,对发动机前支架进行彻底的检查。结果发现,造成螺栓断裂的主要原因是安装在前支架上的减振胶套严重破损,使发动机的振动加剧,并使车架支承横梁的支承部位弯曲变形,从而使原来前支架与支承横梁之间的面接触变成了点接触,造成前支架固定螺栓的使用寿命越来越短。由于外商不单独提供减振橡胶 The Ingersoll Rand SD180 vibratory roller manufactured by Cummins 6CTA8.3-7 engine, after running 2 000h, the engine and the front bracket connected to the four M12 bolts frequently broken. At first thought it was not enough strength bolts, but changed to high-strength bolts still the same, and the shorter the fracture cycle, about 10h fracture. Then, the engine front bracket for a thorough examination. It was found that the main cause of bolt breakage is that the vibration damping rubber bush installed on the front bracket is severely damaged, which aggravates the vibration of the engine and distorts the supporting portion of the frame supporting beam so as to make the original front bracket and the supporting beam Between the surface contact into a point of contact, resulting in the front bracket fixing bolt life shorter and shorter. Because foreign investors do not provide rubber damping alone