What are the seals used on the engine

The seal used on the engine is a seal called a pneumatic oil seal. Pneumatic oil seals use compressed air to block the gap of the rotating shaft and prevent the leakage of the working medium.

Pneumatic seal has the characteristics of simple structure. Generally, it is made of the outer skeleton and fluororubber co-vulcanized, but it requires a certain pressure of air supply, so the consumption of compressed air is large, and the pressure of the air source is higher than that of the sealing medium. The pressure is large, and the pneumatic seal is not limited by speed and temperature. It is usually used for the sealing of rotating mechanical equipment with small pressure difference, for liquid medium sealing, and also for gas medium sealing. For example, it is used to prevent lubricating oil in bearing chambers. of leakage.

A self-tightening spring or steel wire is installed on the sealing diameter of the valve seal, which is used to seal the engine valve guide. The valve oil seal can prevent oil from entering the intake and exhaust pipes, causing oil loss, preventing the leakage of gasoline and air mixture and exhaust gas, and preventing engine oil from entering the combustion chamber.