一、概述随着石油化工和航空工业的发展,转动轴的被密封介质压力P和转动轴的线速度V越来越高,一般的机械密封已经不能适应使用要求。按目前水平,经过精心设计和选材的单级平衡型机械密封,在V值大于10米/秒时,承受的介质压力P不能大干70公斤/厘米~2,并且在这样条件下,寿命很难超过2000小时。因 I. Overview With the development of petrochemical and aviation industry, the rotating shaft is sealed medium pressure P and the linear velocity of the rotating shaft V is higher and higher, the general mechanical seal can not meet the requirements. At current levels, a single-stage, balanced mechanical seal, carefully designed and selected, can withstand a medium pressure P of 70 kg / cm² at V values ​​greater than 10 m / s, and under such conditions, the life span is very high Difficult to exceed 2000 hours. because