Analysis of self-sealing technology of chrome-plated precision slender shaft
The additional sealing device of the chrome-plated precision slender shaft can effectively prevent the intrusion of foreign objects, but this additional sealing device will increase the axial size of the mechanism, and bring inconvenience to the use, installation and maintenance. At the same time, its sealing performance is also affected by the shaft diameter and The machining accuracy of the matching parts of the shell and the influence of the row tolerance. The sealed bearing can not only have a good sealed and lubricated environment, but also solve the problem of the supporting part, and at the same time, it can save the complicated lubrication system.
Therefore, the chrome-plated precision slender shaft has a compact structure. For parts with strict sealing requirements, it is recommended to use a sealed self-sealing. In addition to good dust-proof and sealing effect, it can also maintain a good running state without replenishing lubricant during operation. Reduce maintenance costs.
The self-sealing of the chrome-plated precision slender shaft is divided into contact type and non-contact type according to the structure. According to the contact form, the bearing seat can be divided into radial seal and axial seal. Non-contact seals generally have two types: dust cover and rubber sealing ring. According to the structure of the sealing ring, it can be divided into single lip seal and double lip seal.
The dust cover has a large sealing gap, which is only suitable for dust prevention. The rubber slewing bearing rubber seal has a small sealing gap and has a better sealing effect. The lip of the rubber sealing ring is in interference contact with the rotating part of the bearing with a certain adhesion force, so as to achieve a good dust-proof sealing effect, but its limit speed is lower and the friction torque is larger. Contact seals generally have only rubber seals and auxiliary parts.
