What is the purpose of the seal? Why use seals?

What is a sealing ring? Maybe when you first came into contact with this word, everyone would have a lot of questions, or even don’t understand, or even know that the friends you met don’t know him very well. Why do you have to use a sealing ring? Then I will introduce it to you today. Related knowledge.
As the so-called interlacing is like a mountain, friends who have just come into contact with the machinery industry may still have questions about why seals must be used and what are the effects.

　　
In fact, in many machinery, it needs to be sealed to be able to work normally. If the machinery is not sealed, it is likely to cause external and internal leakage, and even tiny dust particles will invade the system, causing or aggravating the hydraulic pressure. The wear of the friction pair of the components further leads to leakage. In severe cases, it will cause mechanical failure and cause heavy losses. I often see news about leaks in the news, but in the final analysis, these are because the sealing work is not done well, leading to serious consequences.
　　
In order to better prevent this kind of thing from happening again, the machine is equipped with sealing devices to prevent the leakage of working medium and the intrusion of external dust and foreign objects. The components that play a sealing role are called seals.
　　
Therefore, sealing rings and sealing devices are an important part of mechanical equipment. The reliability and service life of its work is an important indicator to measure the quality of machinery.