- As we all know, seals have a wide range of uses in life. Basically, things that are touched with machinery will use seals. As large as cars and airplanes, as small as lighters, mice, etc., seals have to be used. There are many types of seals, which can be divided according to the raw materials: compared with common silicone rubber seals, fluorine rubber seals, ethylene-propylene rubber, polytetrafluoroethylene, neoprene, polyurethane and so on. According to the usage, it can be divided into acid-resistant seals, alkali-resistant seals, high-temperature-resistant seals, low-temperature-resistant seals, oil seals, and so on. Many machines cannot be operated without a low seal. For example, oil seals. If there is no oil seal, oil may leak and the machine cannot be operated. I often see news about the leakage of crude oil on TV. In fact, it means that the seal is not done well. Perhaps the quality of the seal is not good. The seal is an important part of the machine and has an important effect on the operation of the equipment. In order to prevent foreign matter from entering, it is necessary to use seals in the machine.
- Seals with different uses can work in different environments. For example, high and low temperature environment, acid and alkali solution, oil resistance and so on. Different materials should be selected for seals operating in different environments, such as the high temperature resistance of fluoro rubber. Sometimes the hardness of the seal is also an important factor that affects the application in life. Not all seals are soft, for example, PTFE seals are quite hard. Mechanical seals should be checked frequently, and if abnormalities are found, they should be replaced in time, such as seal deformation, cracking, etc. The main factor affecting the service life of the seal is the operating environment. Temperature is the main factor affecting the hardness of the seal. In order to increase the elasticity of the seal at low temperature and reduce the shrinkage of the material, it is necessary to improve the formulation of the material, and a certain amount of plasticizer must be added to the rubber. Long-term immersion in the operating medium, the plasticizer will gradually be absorbed by the operating medium, resulting in a shortened seal aging. Therefore, the seals should be checked frequently to avoid accidents caused by aging.