Impact sound of rolling elements and its control method When larger ball bearings or tapered roller bearings run at low speed under pure radial load, due to the small centrifugal force of the rolling elements, the rolling elements in the non-load area will impact the cage or raceway and make noise. But as the speed increases, this sound will disappear. The control methods for the impact sound of the rolling elements include: appropriately reducing the radial clearance, and using a bearing with a cage with a reasonable structure and a flexible material.
Rolling sound of tapered roller bearings and its control method Rolling sound is a harsh metal friction sound that may occur in cylindrical roller bearings in all occasions. It mostly occurs in larger bearings lubricated with grease, but it is more likely to occur in grease with degraded base oil performance, and it hardly occurs in oil lubrication.
First of all, the structure design is reasonable and advanced at the same time, so that the life of the tapered roller bearing will be longer. The manufacture of bearings generally goes through multiple processing procedures such as forging, heat treatment, turning, grinding and assembly. The rationality, advancement and stability of each processing technology will also affect the life of the bearing. Among them, the heat treatment and grinding processes that affect the quality of the finished bearing are often more directly related to the failure of the bearing. In recent years, the research on the metamorphic layer of the working surface of the bearing shows that the grinding process is closely related to the quality of the bearing surface.
The metallurgical quality of bearing materials used to be the main factor affecting the early failure of tapered roller bearings. With the advancement of metallurgical technology (such as vacuum degassing of bearing steel, etc.), the quality of raw materials has improved. The proportion of raw material quality factors in bearing failure analysis has been significantly reduced, but it is still one of the main factors affecting bearing failure. Proper material selection is still a factor that must be considered in bearing failure analysis.
The main task of bearing failure analysis is to find out the main factors causing the failure of tapered roller bearings based on a large number of background materials, analysis data and failure forms, so as to propose targeted improvement measures, prolong the service life of bearings, and avoid sudden early failure of bearings.