The development of China's mechanical seal technology has gone from a difficult start to today's rapid development. China's mechanical seal technology has made important contributions to the development of China's machinery industry. What are the important functions of mechanical seals? Let me introduce to you.

1. Improve machine efficiency and reduce energy consumption.

(1) The mechanical seal can reduce the internal leakage, external leakage and leakage of the machine, and improve the volumetric efficiency of the machine.

(2) The mechanical seal can reduce friction loss and improve the mechanical efficiency of the machine. For example, changing the double end face seal to the single end face seal, the unbalanced type to the balanced type, and the closed end of the double-supported bottom-reducing pump (the so-called chopper pump) to reduce the seal can reduce friction loss and improve mechanical efficiency.

(3) Change the sealing method to improve the efficiency of the machine or unit. For example, change the canned motor pump to a mechanically sealed pump to improve the efficiency of the motor; use a magnetic drive pump to improve the efficiency of the machine.

(4) Change the auxiliary system to reduce energy consumption and improve the efficiency of the unit. For example, the hot oil pump self-flushing is changed to small impeller cycle flushing; the double end face seal is changed to a single end face seal, which saves the energy consumption of the oil sealing auxiliary system.

2. The mechanical seal can save raw materials. For example, process fluid recovery, reduce or eliminate the loss of power steam and process fluid, reduce oil sealing loss, etc.

3. The mechanical seal can improve the reliability of the machine. For example, the leakage and life of the shaft seal determine the reliability of the shaft seal and the machine.

4. Safety and environmental protection. According to a survey report of a Japanese factory, 32 of the 786 accidents that occurred were caused by leakage (42%). In addition, process fluid leakage can also cause environmental pollution, including air pollution, water pollution and workshop environment pollution.

The importance of mechanical seals:

1. Although the sealing technology is not a leading technology, it is a decisive technology. For example, the US Space Shuttle Challenge fell due to a sealing accident; the circulating pump of the nuclear power plant was changed from a shaft-sealed pump to a shaft-sealed pump for safety and reliability. After the improvement of the mechanical seal, due to its reliable work, the shaft-sealed pump was changed back to a shaft-sealed pump, thereby increasing the efficiency of the motor. These two things fully show that although mechanical seals are not leading technologies, they are decisive technologies.

2. Although the seal is not large, it is just a component, but it can determine the safety, reliability and durability of the machinery and equipment. The shaft seal in the pump kettle of the petrochemical plant is not large. Once a product leakage accident occurs, it will not only It will affect the work of pumps and equipment, and will also cause combustion or explosion, resulting in shutdown of process equipment and personal injury.

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