INA oilless bearing damage causes and countermeasures

In general, the proper use of imported bearings, the fatigue life can be achieved. 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. INA 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, without oil 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. However, if used in fully understand the bearing working condition of machines, and its periphery 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 and processing INA 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, without oil 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 cause of the INA 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, INA bearings in the 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. Without oil 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. First of all, reasonable structure design and equipped with advanced, just can have a long bearing life. Bearing manufacturing generally go through forging, heat treatment, cutting, grinding and assembly, and multi-channel processing operations. The rationality of the processing technology, advanced, stability will also affect the service life of bearing. Which affects the quality of finished products bearing heat treatment and grinding process, tend to have a more direct relationship with bearing failure. In recent years the study of metamorphic layer of bearings working surface show that the grinding process and is close to the surface quality of the bearing. Imported bearing materials metallurgy quality was the main factor affecting the premature failure of the rolling bearing. As metallurgy technology, For example, the bearing steel vacuum degassing, etc. ) Progress, raw material quality is improved. Raw material quality factor in the INA bearing failure analysis share has declined obviously, but it is still without oil bearing failure of one of the main influence factors. Select material adequacy is still bearing failure analysis factors must be considered. The main task of the imported bearing failure analysis, it is based on a lot of background material, analyze data and failure forms, find out the main factors of bearing failure, so that the improvement measures are put forward, extend INA bearings, avoid oilless bearing sudden early failure.