What are The Application Materials and Functions of Oil Seals?

Number of hits：42024-10-21 11:33:32　

　　Oil seals are widely used in daily life, from large engineering machinery to small household appliances. What materials are oil seals made of? What are their functions? Please see the detailed introduction below.

　　Common materials for oil seals are: nitrile rubber, fluororubber, silicone rubber, acrylic rubber, polyurethane, polytetrafluoroethylene, etc. When selecting the material of the oil seal, we must consider the compatibility of the material with the working medium, the adaptability to the working temperature range, and the ability of the lip to follow the high-speed rotation of the rotating shaft.

　　When selecting the material of the oil seal, we should pay attention to the type and characteristics of the rubber. The working range of the oil seal is related to the material used for the oil seal: -40~125℃ for nitrile rubber (NBR), -25~150℃ for acrylic rubber (ACM), -20~250℃ for fluororubber (FKM), -60~225℃ for silicone rubber (VMQ), -20~120℃ for polyurethane (PU), -65~260℃ for polytetrafluoroethylene (PTFE).

　　Functional use:

　　Different types of oil seals are used for different mechanical parts, for example:

　　· Used for sealing the engine crankshaft and camshaft of the transmission system of cars, motorcycles and commercial vehicles.

　　· Used for oil seals in the transmission system of agricultural machinery and engineering machinery such as forklifts and excavators.

　　· Used for sealing industrial gearboxes.

　　· Used for sealing hydraulic components (such as pumps and motors) to effectively maintain the stability and efficiency of the hydraulic system.

　　As can be seen from the above content. Oil seals play a vital role in various machines. The use of oil seals ensures the normal operation of the machinery and extends its service life, greatly facilitating our living environment.