一、拉缸 拉缸是指气缸壁内表面出现微观的金属粘附、剥落、熔移和撕裂现象。拉缸造成活塞与缸套配合间隙增大,气缸气密性降低,燃烧室内气体窜入曲轴箱,使曲轴箱内气压升高,引起机油泄漏和烧损,发动机功率下降,油耗增加,起动困难。 1.拉缸产生的原因 (1)未按使用说明书的规定充分磨合。新机或大修后的柴油机,气缸表面的几何形状没有 First, the cylinder pull cylinder cylinder wall surface is microscopic metal adhesion, peeling, melting and tearing phenomenon. Cylinder caused by pulling the cylinder piston and cylinder with the gap increases, the air tightness of the cylinder decreases, the combustion chamber gas fleeing into the crankcase, the crankcase pressure increases, causing oil leakage and burning, the engine power loss, fuel consumption increases, difficult to start . 1. The reasons for pulling the cylinder (1) did not fully run in accordance with the provisions of the instructions. New or overhaul of the diesel engine, the geometry of the cylinder surface is not