Cylindrical roller bearing damage and countermeasures to the relationship

In general, the proper use of timken bearings, can achieve the fatigue life. But if the accident early damage, unable to use. And the fatigue life is different, this early damage, is called the fault or accident. Much due to the installation and use, lubrication of ill-considered, from external invasion of foreign body or for the shaft and the shortage of the research of the bearing. Bearing damage status such as roller bearing ring penal bruises, the reason may be out of lubricant, the brand is not suitable, for oil discharge structure is flawed, foreign invasion, bearing installation error or shaft deflection is too large, it is possible that more integrated caused by various reasons. Therefore, only investigate bearing damage, the real reason is hard to come by injury. But, if the working condition of machines, and fully understand the use of timken bearing outer structure, on the basis of the situation before and after the failure of combining bearing damage, and a variety of related reasons were analyzed, and can prevent the same fault again. The typical bearing damage causes and countermeasures. Even the contemporary most advanced manufacturing technology processing cylindrical roller bearing parts. Observe the reading with pre-tightening load variation method. Preloaded method have its downside, as is known to all. Always save to dial gauge head for its working surface in proper positions of the bearing face or shaft. 1. Mechanical damage serious when in contact with the appearance of metal strip and a massive mixed and disorderly cut; In general, cylindrical roller bearing mechanical damage refers to the alloy bearing appearance appear different levels of the trench. Contact surface damage and ablation phenomenon exists at the same time bearing mechanical damage is the main reason of the timken bearing appearance is difficult to form oil film or oil film were severely damaged. 2. Plastic deformation in the surface layers of bearing outside the cavitation and cold work hardening, sliding bearing in cylinder pressure impact load) Under the action of repeated. Partial loss of the deformation ability, and gradually form lines and expanded, and then with the shedding of wear debris, the outside surface of the load the form. Pits of the cavitation, general bearing bush came first, then gradually expand the pits of the interface crack, and lead to an alloy layer along the interface crack parallel to the direction of extension, until it is peeling off. Sliding bearing of the main causes of cavitation is due to structural elements such as oil groove and oil hole cross-sectional sudden change of oil flow caused by strong disturbance, oil flow disorder of empty space form bubbles, then because of the pressure, generate cavitation bubble breaking. Cavitation occurs commonly in high load bearing, such as the crankshaft main bearing on the lower bearing. 3. Fatigue pitting due to motor overload, cylindrical roller bearing fatigue pitting refers to. To timken bearing overheating and bearing clearance is too large, central bearing fatigue damage and fatigue pitting or fall off. This kind of damage is mostly to overload, bearing clearance is too large, or lubricating oil is not clean, and mixed with caused by foreign bodies. Therefore, when using, should pay attention to prevent the bearing work don't overload with too low or too high speed operation; To adjust the engine to idle speed stable state; To ensure the normal bearing clearance, prevent engine speed too high or too low; Check, adjust the performance of the cooling system, to ensure that the engine working at a comfortable temperature. 4. Units in the lubricating oil bearing alloy corrosion of chemical impurities ( Acidic oxides, etc. ) Make bearing alloy oxidation and acid generated, bearing alloy corrosion is generally area for the lubricating oil is not pure. Bearing alloy local shedding, forms the rule of no small hiatal or small pits. Bearing alloy corrosion is the main reason of the lubricating oil improper selection, timken bearing material corrosion resistance is poor, or the engine work violent, the temperature too high. 5. Bearing burning-out forming local high temperature, between journal and bearing friction pair with tiny bump metal surface in direct contact. Lack of lubrication, cooling and bad situation, make the black or local burning-out bearing alloy. This failure is often caused by journal and bearing with tight; Lubricating oil pressure lack of also easy to make bearings burned.