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机械密封端面比压的大小,对密封寿命有很大的影响。炼油厂操作条件(压力、流量、温度)的波动固然是影响密封寿命的不可忽视的因素,而油品性质(粘度、润滑性、饱和蒸汽压力等)的影响尤其严重。如果不管使用条件的不同,一种型号的离心泵使用同一型式的机械密封,其密封寿命相差是极为悬殊的。有的长达一年之久,有的短则几小时。液态烃泵对机械密封端面比压的要求比其它泵更为严格。我厂催化装置中的液态烃泵,
Mechanical seal end pressure than the size of the seal life has a great impact. The fluctuations in refinery operating conditions (pressure, flow, temperature) are of course not negligible factors affecting the life of the seal, and the nature of the oil (viscosity, lubricity, saturated steam pressure, etc.) is particularly serious. Regardless of the conditions of use, one type of centrifugal pump using the same type of mechanical seal, the seal life difference is extremely different. Some for as long as a year, some as short as a few hours. Liquid hydrocarbon pump on the mechanical seal end pressure than the other more stringent requirements. I plant catalytic device in the liquid hydrocarbon pump,