针对聚氯乙烯车间输送PVC浆料离心泵用机械密封存在的问题 ,研究开发出适用于间歇操作的零泄漏非接触式机械密封 ,应用结果表明 ,新型机械密封可用作PVC浆料输送离心泵轴封 ,不仅能够实现PVC浆料的零泄漏 ,且具有启动性能好、使用寿命长、运行费用大大降低等优点 Aiming at the problems existed in the mechanical seal of PVC slurry centrifugal pump used in PVC workshop, a zero leakage non-contact mechanical seal suitable for intermittent operation was developed. The results show that the new mechanical seal can be used as PVC slurry conveying centrifugal pump Shaft seal, not only to achieve zero leakage of PVC slurry, and has a good start-up performance, long life, greatly reducing operating costs, etc.