Wear and service life of mechanical seal manufacturers

The wear amount and service life of mechanical seal manufacturers 1. About the service life In the mechanical seal, the main wear part is the end face of the seal friction pair, because the wear amount of the seal end face is not large under normal working conditions, such as the graphite friction pair with a balance coefficient of 0.75 , the wear amount per hour in water and oil is about 0.1 microns, that is to say, the wear amount for 10,000 hours of continuous operation is about 1 mm. It can be seen that the wear amount of the friction pair generally does not affect the life of the mechanical seal. Mechanical seals can generally be used continuously for 1 to 2 years, and it is no problem to use them for 5 to 10 years in individual occasions. The premise of the above-mentioned life is that the mechanical seal operates under the allowable working conditions, such as shaft movement, beating, medium particle concentration, temperature, corrosion and other factors. External factors affecting the service life of the mechanical seal: 1. Large amount of movement of the pump shaft 2. Large axial force 3. Large disturbance of the pump shaft 4. Unreasonable auxiliary flushing system Second, the standard for leakage in my country JB4127.1 -1999 'Technical Conditions for Mechanical Seals' stipulates: 'In the case of reasonable selection and correct installation and use, when the medium to be sealed is water, oil and similar media, the service life of the mechanical seal is generally not less than 1 year. When the sealing medium is a corrosive medium, the service life of the mechanical seal is generally 6 months to 1 year. However, when the use conditions are harsh, it is not limited.' In the sealing test, the average leakage shaft (or shaft sleeve) outer diameter is greater than When the diameter of 50mm is not more than 5mL/h, when the outer diameter of the shaft (or bushing) is not more than 50mm, the leakage is not more than 3mL/h