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近年来,由于柴油机压缩比和转速的提高及采用了新的燃烧过程,过去常用的密封垫片(如铜包石棉垫片)已不能适用于发动机燃烧压力和热负荷的需要。在密封不良而大量漏气时,缸垫将很快过热而损坏,使发动机功率下降。就是少量漏气,也会产生很麻烦的后果。如冷却水渐渐酸化而造成零件的腐蚀,机体螺柱过热而使予紧力下降,被密封面的材料软化而引起漏水漏油,最后造成润滑不良等等。因此,在考虑密封问题时,固然一方面满足柴油
In recent years, due to the improvement of the compression ratio and speed of the diesel engine and the adoption of a new combustion process, conventionally used gaskets (such as copper asbestos gaskets) are no longer suitable for the needs of engine combustion pressure and heat load. In a bad seal and a large leak, the cylinder pad will soon be overheated and damaged, so that the engine power down. Is a small amount of leaks, will have very troublesome consequences. Such as the cooling water gradually acidification caused by corrosion of parts, body stud overheating to make the tight decline, the sealing surface of the material is softened and cause leakage of oil leakage, resulting in poor lubrication and so on. Therefore, in considering the issue of sealing, while on the one hand to meet the diesel