Why does the SKF bearing make a squeak when it is running?
The sharp screams of SKF bearings are common occurrences and are characterized by:
A. SKF bearings have large radial clearance and are easy to produce.
B. Usually appears in grease lubrication, oil lubrication is relatively rare.
C. As SKF bearings are reduced in size, they often occur over a range of speeds.
D. Usually occurs in winter.
E. Its appearance is irregular and unpredictable, full of fat content and function, installation, and operating conditions.
The radial clearance of the SKF bearing and the use of a shallow structure to prevent the raceway of the outer ring, which can reduce noise.
Teach you how to extend the service life of bearings
Bearing bearings and seals are essential if they are used in harsh environments because they prevent dirt ingress and extend bearing life. The rolls in the mill are typically supported by four rows of sealed tapered roller bearings. It is required to withstand strong impact loads, intrusion of water and debris.
Ultra-easy to seal clean roll neck bearings developed by NSK Japan. This type of bearing has a 34% increase in load under severe lubrication conditions, high reliability, long life and easy maintenance. This performance improvement is the result of optimized mechanical design, new materials and patented sealing technology. Compared to conventional roll neck bearings, this sealed roll neck bearing not only increases the basic dynamic load rating by 34%, but also extends life by 2.7 times.
The second factor in improving the performance of the ultra-capacity sealed cleaning roller neck bearing is the use of Super-TF bearing steel developed by NSK. This material solves the problem of bearing life under conditions of contamination or under-lubrication. Experience has shown that under contaminated operating conditions, bearings are susceptible to contamination by debris intrusion. NSK's research shows that bearing life under contaminated or edge-lubricated conditions can be improved by improving the microstructure of the bearing steel. The new sealing structure is the main seal and the hole seal.
The negative pressure generated in the bearing can cause water to intrude from the main seal, and the structure of the hole seal has a great influence on the negative pressure. Therefore, reducing the negative pressure in the bearing is a basic requirement to prevent water from entering. The most effective method is to make the hole seal not directly in contact with water, while retaining the original function of the hole seal - preventing water and dirt from invading from the side of the roll neck. The sealing method uses surface contact instead of line contact. Whether it is running or stationary, the surface contact hole seal has good sealing performance. Therefore, the new ultra-capacity sealed cleaning roller neck bearing has higher reliability than the conventional sealed roller neck bearing.
In addition, SKF Italy Seals has recently developed a new generation of oil and grease seals Mud Block. Its optimized design of the sealing structure can effectively prevent the intrusion of dirt. The conventional sealing structure has a radial sealing lip, a clamping spring between the outer diameter and the race, and a fixed sealing ring. The new structure has a push baffle between the bushing and the seal ring. The outer surface of the seal ring and the inner diameter of the bushing are rubber, and the inner lip is pre-lubricated with waterproof grease. Mud Block can be made from a variety of elastomeric materials depending on operating conditions and application requirements. These materials include: nitrile, polyacrylate, fluorinated synthetic rubber, etc.
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