The self sealing of precision slender shafts is also directly divided into contact and non-contact sealing according to their structural form. According to the contact form, it will be divided into radial seals and axial seals. Non contact seals are divided into two types: those with dust covers and those with rubber seals; According to the structure of the sealing ring on the precision slender shaft, it is also divided into single lip seal and double lip seal.
The sealing gap of the dust cover with precision slender shaft is relatively large, which is only suitable for dust prevention. The sealing gap of the rubber seal ring of the rubber turntable bearing is relatively small, which will also have a good sealing effect. For rubber sealing ring lips, they will come into contact with the rotating parts of precision slender shaft bearings with a certain adhesive force, which also plays a good role in dust sealing. However, it should be noted that its maximum speed is relatively low and its friction torque is relatively large.
The additional sealing device of precision slender shaft can effectively prevent foreign objects from invading, but it will also increase the axial size of the mechanism, which will cause great inconvenience to use, installation and maintenance. At the same time, its sealing performance will also be affected by the machining accuracy and positional tolerance of the shaft diameter and housing matching parts.
But for precision slender shafts with seals, there will be a relatively good sealing and lubrication environment, which can also solve the problem of supporting parts; At the same time, it can also largely eliminate complex lubrication systems. Due to the compact structure of the precision slender shaft, there are strict sealing requirements for certain parts.
It is recommended to use self sealing for precision slender shafts, which not only has good dust-proof and sealing effects, but also maintains good operating conditions without supplying lubricants during operation. This can also reduce maintenance costs when using precision slender shafts.