The role and position of mechanical seal

Author： Date：2018-03-30 22:22:00 Visits：

With the continuous technological progress and development, mechanical seals have been widely applied in all kinds of fluid machinery and equipment. According to the survey, more than 90% of the machine and pump used mechanical seals in refinery and chemical plants. It can be seen that mechanical seals play a decisive role in shaft seals of machine pumps. At the same time, pump mechanical seals also play an important role in equipment management, mainly in the following aspects.

1. strong guarantee of safety production and environmental protection. According to Japan's disaster accidents for petrochemical enterprises.

Statistics, about 332 of the 786 accidents in the chemical plant were caused by leakage, and the leakage of the potassium isocyanate gas from the Union Carbine Co pesticide factory in Bhopal, India, has caused catastrophic consequences. Besides, the leakage of fluid medium will also cause environmental pollution, including pollution to the atmosphere, water and workshop environment.

2. prolong the operation cyle of the production equipment, improve the efficiency of the machine, the mechanical seal has excellent performance, realize the liquid phase zero leakage or the gas (steam) phase zero escape (all known as no leakage), ensure the normal operation of the equipment, effectively improve the operation rate of the production equipment and the single machine, so that the operation cycle of the device is prolonged. Therefore, the equipment maintenance interval is prolonged, and the efficiency of the machine is also improved.

3., reduce energy consumption, save resources and achieve energy saving and emission reduction. The mechanical seal has excellent performance and can reduce the loss of water, electricity, oil, gas and material, process fluid recovery, reduce or eliminate the loss of power steam and process fluid, reduce the loss of sealing oil and so on.

Although the weight of mechanical seal technology in modern fluid engineering technology is not too large, it can not be ignored.

1., although mechanical seal is not a decisive technology area, it is a key technology in some cases.

For example, the safety and reliability of the circulating pump of nuclear power plant can be changed from shaft seal pump to non shaft seal pump. This case can explain the important role of sealing technology.

2., although the mechanical seal is not large, it is only a basic component in the machine, but it can decide the performance, safety and reliability of the machine. On a variety of mechanical equipment, a day of mechanical seal failure, not only will affect the normal work of the equipment will also burn or explosion, even cause the machine to destroy the fatal accident and so on.

3., mechanical seals are more than half of the workload in the maintenance of mobile devices. Through the investigation of several petrochemical enterprises at home and abroad, it is found that the proportion of mechanical seals used in equipment is larger than that of pumps. Especially in centrifugal pumps, about 70% of the maintenance cost is due to the sealing failure.

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