Methods and Advantages of Precision Bearings with Additional Seals

Rolling bearings can be divided into open structure and sealed structure, and sealed type can be divided into self-contained seals and additional seals. Generally, self-contained seals are relatively simple and the price is relatively cheap, while bearings with additional seals are installed in the end cover, etc. Internally, it is manufactured into a sealing device with various properties. If the additional sealing performance is to be better, some factors need to be considered in the sealing process. First of all we need to understand what additional bearing sealing methods are available.

A non-contact seal is a seal in which the seal does not contact its relative moving parts and has an appropriate gap. 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, and different structures are used in different occasions. At the same time, 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 during operation, which emits heat, and the contact surface is easy to wear, which will cause the sealing effect and performance to decline with time. According to the working conditions of the precision 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. Commonly used contact seals include felt seals, leather cup seals and other structural forms, which are used in different occasions.

The additional sealing of the bearing will effectively protect the interior of the rolling bearing, but at the same time, it will increase friction, which has advantages and disadvantages. If you want to add seals to your bearings, please consult us FV, our engineers will analyze your specific working conditions and make the best suggestions for you.