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气缸垫是装于气缸体和气缸盖接合面之间的密封件,防止燃气、冷却水和润滑油窜漏。如果密封效果不佳,后果十分严重。例如当然烧室不能保证密封时,将使缸垫过热而损坏,造成漏气,导致一系列故障的出现。若窜入水套,会使冷却水渐渐酸化,导致缸垫腐蚀和缸套穴蚀加速。若窜入油道,将使机油变质和稀释,失去润滑作用。漏气还会使缸盖螺栓过热,紧固力下降,使接合面密封性能降低,引起缸盖、缸体、缸套凸肩之间密封面的表面材料软化,从而导致密封处压力下降,造成恶性循环,引起一系列不良后果。本文剖析了缸垫烧坏的各种现象、原因及预防的措施,以提高气缸垫的使用寿命。
Cylinder gasket is installed in the cylinder block and cylinder head seal between the sealing surface to prevent leakage of gas, cooling water and lubricants. If the sealing effect is poor, the consequences are very serious. For example, of course, the combustion chamber can not guarantee the seal, the cylinder pad will be overheated and damaged, resulting in leaks, resulting in a series of failures. If fleeing into the water jacket, will make the cooling water acidification, leading to cylinder liner corrosion and cylinder liner cavitation accelerated. If fleeing into the oil, will make oil deterioration and dilution, loss of lubrication. Leakage will make the cylinder head bolts overheating, reducing the fastening force, so that the joint sealing performance decreases, causing the cylinder head, cylinder block, shoulder surface seal between the surface material softening, resulting in pressure drops at the seal, resulting in Vicious cycle, causing a series of adverse consequences. This paper analyzes the various phenomena of cylinder bum burned, the reasons and preventive measures to improve the service life of the cylinder head gasket.