1. 1 Friction and wear of materials
Rolling bearing life is greatly affected by the material properties of the bearing, especially in harsh environments. However, since there are many friction pairs of the rolling bearing, the friction must be worn, and the bearing will be ineffective when worn to a certain extent. Wear failure is one of the main forms of rolling bearing failure. The wear properties of Cr4Mo4V were studied. It is believed that the surface of the material with adhesive wear and fatigue wear will cause surface cracks; and the tribological analysis of rolling bearing WEC failure is considered to be the product of friction material, friction machine and tribochemical balance. Therefore, studying the friction and wear of bearing materials, exploring the wear mechanism of bearing materials, and seeking to reduce the wear of rolling bearings from the material point of view is one of the methods to effectively improve the life of rolling bearings.
1. 2 Structural Design (Design Tribology)
With the wide application of rolling bearings, especially under severe conditions, higher requirements are placed on the design of rolling bearings. The purpose of the rolling bearing design should be to meet the application requirements, such as SKF
The high-speed angular contact ball bearings [12] developed by the company have changed the bearing design to meet the high speed (dm·n = 1. 05 × 106 mm·r/min): Improve the profile of the channel surface and change the contact The corner improves the shape of the cage pocket, ultimately reduces the sliding between the ball and the channel surface, reduces the pocket hole force, and thus reduces the friction between the cage and the ball, and finally develops a high-performance bearing that meets the requirements. The design of the rolling bearing achieves the effect of minimizing the friction of each friction pair while meeting the customer's requirements. It can be seen that the application of tribology helps to improve the design of rolling bearings.
1. 3 Surface Treatment and Tribology
With the in-depth statistical analysis of the failure of rolling bearings, the failure often occurs in the surface and subsurface of the ferrule or rolling element; in addition, in the context of saving energy and reducing pollution worldwide,
Rolling bearing surface treatment technology has developed rapidly. It is believed that the surface treatment technology of rolling bearings is a future development trend. Regardless of traditional surface treatment techniques such as carburizing, nitriding, PVD and CVD, or emerging surface treatment technologies such as ion implantation, laser surface modification, ultrasonic surface modification, etc., performance evaluation, ie wear resistance, It is necessary to pass the friction test. The influence of N ion implantation on the wear properties of 9Cr18 surface layer, the effect of metal ion implantation on the wear properties of Cr4Mo4V and the wear properties of M50 surface treated by ZnO composite layer were investigated. Surface treatment with natural antioxidants significantly reduces the friction factor. By studying the tribological properties of the surface treated surface, the performance and damage mechanism of the modified layer can be grasped, and the surface treatment process is finally improved, and the bearing performance and life are improved. Therefore, tribology is widely used in rolling bearing surface treatment technology.
