In general, with the correct use of full complement bearing.com/cylindrical-roller-bearings.html' target='_blank'>cylindrical roller bearings, fatigue life can be achieved. But in the event of accidental early damage, it can no longer be used. Unlike fatigue life, this early damage is called a failure or accident. Most of them are caused by poor consideration of installation, use, and lubrication, foreign matter intruding from the outside, or insufficient research on shafts and bearing housings. The damage state of the full complement cylindrical roller bearing, such as the abrasion of the ring rib of the roller bearing, may be caused by insufficient lubricant, inappropriate grade, defective oil supply and discharge structure, foreign matter intrusion, skf bearing installation error or shaft The deflection is too large, which may also be caused by a combination of the above reasons. Therefore, it is difficult to know the real cause of the damage only by investigating the bearing damage. However, on the basis of fully understanding the machine, working conditions and peripheral structure of the bearing, clarifying the situation before and after the failure, and then analyzing the damage of the bearing and various related reasons, similar failures can be prevented from happening again. Representative bearing damage causes and countermeasures. Even full complement cylindrical roller bearing parts are machined using the most advanced manufacturing techniques of the day. See how its readings change with preload. The preload method has its downsides, as we all know. Its working surface will always have the dial indicator against the appropriate part of the bearing end face or shaft. 1. When the mechanical damage is serious, metal peeling occurs on the contact surface and a large area of ​​messy scratches occurs; under normal circumstances, the mechanical damage of skf bearings refers to the appearance of different levels of groove marks on the alloy surface of the bearing bush. The main reason for the mechanical damage of the bearing due to the coexistence of contact surface damage and ablation is that the surface of the full complement cylindrical roller bearing is difficult to form an oil film or the oil film is seriously damaged. 2. Plastic deformation and cold work hardening occur on the outer surface of the bearing cavitation, and the full complement cylindrical roller bearing is under the repeated action of the cylinder pressure impact load). The deformability is lost locally, and lines are gradually formed and continuously expanded. Then, as the wear debris falls off, the loaded outer layer forms holes. Generally, when the bearing bush is cavitated, the pit first appears, and then the pit gradually expands and causes the cracking of the alloy layer interface. The crack expands along the parallel direction of the interface until it peels off. The main reason for the cavitation of skf bearings is that the oil flow is strongly turbulent due to the sudden change of the cross-section of structural elements such as oil grooves and oil holes, and the vacuum area where the oil flow is turbulent forms bubbles. Cavitation generally occurs in high load areas of the bearing, such as the lower bearing pad of the crankshaft main bearing. First of all, if the structure design is reasonable and advanced, it will have a longer bearing life. The manufacture of bearings generally goes through multiple processing processes 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 bearing working surface shows that the grinding process is closely related to the bearing surface quality. The metallurgical quality of the full complement cylindrical roller bearing material used to be a major factor in the early failure of rolling bearings. With the advancement of metallurgical technology (such as vacuum degassing of bearing steel, etc.), the quality of raw materials has been improved. The proportion of raw material quality factor in the failure analysis of full complement cylindrical roller bearing has dropped significantly, but it is still one of the main factors affecting the failure of skf bearing. Whether the material is selected properly is still a factor that must be considered in bearing failure analysis. The main task of failure analysis of full complement cylindrical roller bearings is to find out the main factors causing bearing failure based on a large number of background materials, analysis data and failure forms, so as to propose improvement measures in a targeted manner to extend the full complement cylindrical roller bearing. During the service period, avoid sudden early failure of skf bearings.
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