Mechanical seal manufacturer Explain the effect, meaning and position of mechanical seal

Effect of mechanical seal:

1、 Improve machine power and reduce energy consumption.

1. Reduce the internal leakage, external leakage and penetration of the machine, and improve the volumetric power of the machine.

2. Reduce conflict loss and improve mechanical power of mechanical seals of machines. For example, changing the double end seal to single end seal, changing the unbalanced type to balanced type, and cutting the seal at the closed end of the double support bottom reducer pump (the so-called chopping pump) can reduce the conflict loss and improve the mechanical power.

3. Change the sealing method and improve the power of the machine or unit. For example, the canned motor pump will be replaced by a mechanical seal pump to improve the motor power; Use magnetic drive pump to improve machine power.

4. Modify auxiliary system, reduce energy consumption and improve unit power. For example, the self flushing mechanical seal brush of the hot oil pump is changed to the circulating flushing of the small impeller; Double end seal is replaced by single end seal to save energy consumption of auxiliary oil sealing system.

2、 Save raw materials. For example, process fluid recovery, reduction or elimination of power steam and process fluid loss, reduction of seal oil loss, etc.

3、 Improve machine reliability. 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 the inquiry report of a Japanese factory, 32 of the 786 incidents were caused by leakage (42%). In addition, leakage of process fluid will also cause environmental pollution, including air pollution, water pollution and workshop environmental pollution.

Meaning of mechanical seal:

1、 Although sealing skills are not preemptive skills, they are decisive skills. For example, the US space shuttle Yingzhan fell due to the sealing incident; In order to be safe and reliable, the circulating pump in the nuclear power plant was changed from the one with shaft seal to the one without shaft seal. After improving the mechanical seal, the pump with shaft seal was replaced by the pump without shaft seal because of its reliable operation, and then the motor power was improved. These two operations fully illustrate that although mechanical seal is not a preemptive skill, it is a decisive skill.

2、 Although the seal is small, it is only a part, but it can determine the safety, reliability and durability of machinery and equipment. The shaft seal in the pump kettle of petrochemical plant is not large. Once the product leaks, it will not only affect the operation of the pump equipment, but also burn or burst, resulting in strikes of process equipment and casualties.

3、 Mechanical seals account for about 50% of the daily repair work of equipment such as pumps, kettles and so on. Through the inquiry of several petrochemical enterprises at home and abroad, it is clear that the repair work of mechanical seals accounts for almost 50% of the daily repair work of equipment such as pumps, kettles and so on. About 70% of the repair cost of centrifugal pumps is due to sealing defects.

Location of mechanical seal:

According to the inquiry, more than 86% of petrochemical process equipment pumps use mechanical seals. With the development of mechanical seal skills, mechanical seal will play an increasingly important role in pumps.