The Sealing Of Bearings Can Be Divided Into Two Types

The sealing of bearings can be divided into two types: self sealing and external sealing. The so-called bearing with its own seal refers to manufacturing the bearing itself into a device with sealing performance. Such as bearings with dust covers, sealing rings, etc. This type of seal takes up very little space, is easy to install and disassemble, and has a relatively low cost. The so-called bearing external sealing performance device refers to a sealing device with various performance manufactured inside the installation end cover, etc. The external sealing of bearings can be divided into two types: non-contact sealing and contact sealing. Non contact sealing is suitable for high-speed and high-temperature applications, with different structural forms such as clearance type, labyrinth type, and gasket type. Contact sealing is suitable for medium to low speed working conditions, and commonly used structural forms include felt sealing, leather cup sealing, etc.
According to the requirements of bearing working conditions and working environment for sealing degree, various sealing forms are often comprehensively used in engineering design to achieve better sealing effect. The selection of external sealing for bearings should consider the following main factors:
Bearing lubricants and types (grease and oil);
The working environment of the bearing and the size of the occupied space;
The advantages of the supporting structure of the shaft allow for angle deviation;
The circumferential velocity of the sealing surface;
The working temperature of the bearing;
Manufacturing costs.