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Home - News - How much do you know about pneumatic oil seals?

How much do you know about pneumatic oil seals?

November 12, 2021


      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 leakage of the working medium.


      Pneumatic oil seal has the characteristics of simple structure. Usually, it is made by co-vulcanization of

 

the outer frame and fluoro rubber, but it needs a certain air supply pressure, so the consumption of compressed

 

air is very large, and the pressure of the air source is greater than the pressure of the sealing medium.

 


   Pneumatic oil seals are not blocked by speed and temperature problems. They are usually used to seal rotating

 

mechanical equipment with small pressure differences, for liquid medium oil seals and for gas medium oil seals

 

to prevent lubricating oil from leaking into the bearing cavity.


   A self-tightening spring or steel wire is installed at the sealing diameter to seal the valve guide rod of the engine.

 

The valve oil seal can prevent oil from entering the intake pipe and exhaust pipe, causing oil loss, preventing gasoline and

 

air mixture and exhaust leakage, and preventing oil from entering the combustion chamber.

 

    The valve oil seal is one of the important parts of the engine valve group. Since it will come into contact with

 

gasoline and engine oil at high temperatures, it is necessary to use materials with excellent heat resistance and

 

oil resistance, usually made of fluorine rubber.