机械密封在我国已广泛应用于石油、化学工业的运转设备之中,特别是在炼油工业上应用更为广泛,如许多炼油厂90%以上的离心泵均采用机械密封,使用寿命达一年左右或更长一些。但在化工厂的化工介质(酸、碱、盐、溶剂等)泵中,采用机械密封甚少,使用寿命只有几天到二、三个月,漏泄严重。由于化工介质种类繁多,性能各异,有的腐蚀性强,有的易燃易爆、有毒、有刺激性臭味,污染环 Mechanical seal in our country has been widely used in the oil and chemical industry equipment, especially in the oil refining industry is more widely used, such as more than 90% of many refinery centrifugal pumps are used mechanical seal, the service life of about a year Or longer. However, in the chemical plant chemical medium (acid, alkali, salt, solvents, etc.) pump, the use of mechanical seal rarely, the service life of only a few days to two or three months, serious leakage. As a wide range of chemical media, different performance, and some strong corrosive, and some flammable, toxic, irritating odor, pollution ring