The seals of precision bearings can be divided into self-contained seals and external seals. Generally, self-contained seals are relatively simple and cost-effective, while bearings with external sealing performance devices are manufactured inside the installation end caps. Various performance sealing devices, In order to make its additional sealing performance more excellent, corresponding factors need to be considered in the sealing process. What are the additional sealing methods for bearings?

The  plus the sealing performance device is a sealing device with various performances manufactured inside the installation end cover. A non-contact seal is a seal in which the seal does not contact its relative moving parts and has an appropriate clearance. There is no frictional heat and no wear during work, and it is suitable for high-speed and high-temperature occasions. Non-contact seals are commonly used in various structural forms such as gap type, labyrinth type and gasket type, which are used in different occasions. The gap of the non-contact seal should be as small as possible.

A contact seal is a seal in which the seal is in contact with its relative moving parts and has no gaps. Due to the direct contact between the seal and the mating part, this kind of seal has a large friction and a large amount of heat during operation, and the contact surface is easy to wear, which leads to a decrease in the sealing effect and performance. Commonly used contact seals include felt seals, leather cup seals and other structural forms, which are used in different occasions. According to the working conditions of the bearing and the requirements of the working environment for the degree of sealing, various sealing forms are often used comprehensively in engineering design to achieve a better sealing effect. The sealing effect of precision bearings should be well guaranteed.