Damage Classification and Corresponding Treatment of TIMKEN Cylindrical Roller Bearings

1. Specific conditions of bearing damage: (1) Mechanical damage: In severe cases, metal peeling and large-scale messy scratches occur on the contact surface; under normal circumstances, mechanical damage to 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) Bearing cavitation: the outer layer undergoes plastic deformation and cold work hardening, 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, pits appear first, and then the pits gradually expand and cause cracks at the interface of the alloy layer. The cracks expand along the parallel direction of the interface until they peel off. timken bearing agent·Analysis of the specific damage of timken cylindrical roller bearings The main reason for cavitation of timken 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, and then due to the pressure increase , the bubble collapses and cavitation occurs. Cavitation generally occurs in high load areas of the bearing, such as the lower bearing pad of the crankshaft main bearing. 2. Bearing design response: (1) The structure design is reasonable and advanced, so that the bearing life will be longer. 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. (2) The metallurgical quality of the full complement cylindrical roller bearing material used to be the main factor affecting the early failure of the rolling bearing. 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. 3. Reasons for the damage of timken full complement cylindrical roller bearings: (1) The damage state of full complement cylindrical roller bearings, such as the scratches on the rib of the roller bearing, may be caused by insufficient lubricant, inappropriate grades, Defective oil supply and discharge structure, foreign matter intrusion, timken bearing installation error or excessive deflection of the shaft may also be caused by a combination of the above reasons. (2) Therefore, it is difficult to know the real cause of the damage only by investigating the bearing damage. However, if you fully understand the machine, working conditions and peripheral structure of the bearing, if you understand the situation before and after the failure, and then analyze the damage of the bearing and various related reasons, you can prevent similar failures from happening again. Representative bearing damage causes and countermeasures. timken bearing agent·Analysis of the specific damage of timken cylindrical roller bearings (3) Even the most advanced manufacturing technology is used to process full complement cylindrical roller bearing parts. 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. Proper use of full complement cylindrical roller bearings can achieve fatigue life. 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.

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