What are the sealing methods of bearings?

The sealing methods of rolling bearings can be divided into contact sealing and non-contact sealing.

1, contact seal includes felt ring seal, sealing ring seal, etc.

2. Non-contact seal includes axial winding seal, radial winding seal, oil groove seal and retaining ring seal.

During this service life, the bearings on any bearing ring or roller should have initial fatigue damage (peeling or defect). However, whether in laboratory test or in actual use, it can be clearly seen that the actual service life of bearings with the same appearance varies greatly under the same working conditions.

In addition, there are several different definitions of bearing "life", one of which is the so-called "working life", which means that the actual life of bearing before damage is caused by wear, and the damage is usually not caused by fatigue, but by wear, corrosion, seal damage and other reasons.

Extended data:

Rolling bearings are divided into radial bearings and thrust bearings according to the load direction or nominal contact angle they can bear. The radial contact bearing is a radial bearing with a nominal contact angle of 0, and the radial contact bearing is a radial bearing with a nominal contact angle greater than 0 to 45.

The axial contact bearing is a thrust bearing with a nominal contact angle of 90, and the thrust angle contact bearing is a thrust bearing with a nominal contact angle greater than 45 but less than 90.

Due to the differences in manufacturing accuracy and material uniformity, even bearings with the same batch, material and size will have different service lives under the same working conditions.

If the statistical life is 1 unit, the longest relative life is 4 units and the shortest is 0. 1-0.2 units, and the ratio of the longest to the shortest life is 20-40 times. 90% of bearings do not produce pitting corrosion, and the number of revolutions or hours experienced is called the rated life of bearings.

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