The main features of the new seal is between the rotating shaft and the seal lip is designed in a wave shape of the rubber layer covering the hub seal ,when working, coaxially rotate together with the inner hub , the hub and the seal lip at its inner achieve dynamic seal between the outer surface.
Its advantages are:
1 , the hub portion in the seal layer of corrugated rubber coated , to adapt the rotation axis and the eccentricity of the relatively large range of sizes larger axis deviation , a better axial and radial cushioning properties , good sealing performance ; but also have a very long service life.
2 , since the seal is the roundness of the shaft , the surface roughness between the seal lip and less demanding to achieve inner hub , the shaft surface is not sensitive to minor damage , improved seal reliability.
3 , the inner hub coated with a layer of rubber , can be securely mounted on the shaft seal , such as rubber- coated prior to installation in the grease points , the installation becomes easier.
4 , between the oil chamber and the external design of a labyrinth passage , and the two dust lip is arranged in the channels , so the main lip and the dust and the water at a distance to extend the seal life.
In short, the new primary seal disposed a hub with the character of the buffer between the seal and the rotary shaft lip seal , the primary seal lip is not directly contact with the shaft , thereby effectively reducing the eccentric shaft , the surface roughness , roundness of the shaft adverse external factors , such as interference with the seal , but also makes it easy to install and improve the sealing effect, extend the service life .

Keyword:the characters of the modern oil seal

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