Type Of Bearing End Cover
Bearing end covers can be divided into two types: self-seal and external seal. The so - called bearing self - sealing is the bearing itself into a device with sealing performance. Such as bearing with dust cover, seal ring, etc.
Characteristics of small space, easy to install and disassemble, low cost
Bearing plus sealing performance device, is in the installation of the end cover and other internal manufacturing with a variety of performance of the sealing device. Sealed and divided into non-contact and contact two:
1.Non - contact seal
Non - contact seal is the seal and its relative movement of the parts do not contact, and have the appropriate clearance of the seal.This form of seal, in the work almost no friction heat, no wear, especially suitable for high speed and high temperature occasions. Non-contact seals are commonly used in different structures such as gap, labyrinth and gasket, which are used in different occasions. Non - contact seal clearance to be as small as possible.
Contact seal is a seal that is in contact with its moving parts and has no clearance. Due to the direct contact between the seal and the mating parts, the friction in the work is larger, heat is also large, easy to cause poor lubrication, contact surface easy to wear, resulting in the sealing effect and performance decline.
Therefore, it is only suitable for medium and low speed working conditions. Contact seal commonly used felt seal, cup seal and other structural forms, used in different occasions. According to the requirements of bearing working condition and working environment for sealing degree, various sealing forms are often used in engineering design to achieve better sealing effect.
The following major factors should be considered in the choice of bearing seal:
1. Bearing lubricants and types (grease and lubricating oil);
2. The working environment of the bearing and the space occupied;
3. Advantages of shaft supporting structure, allowing Angle deviation;
4. Circumferential speed of the sealing surface;
5. Working temperature of the bearing;
6. Manufacturing cost.