Deep groove ball bearing lubrication analysis on friction and wear mechanism

SKF bearing its friction mechanism is significantly different with other bearing, friction is mainly depends on the radial load, oscillation frequency, oscillation frequency, swing Angle, contact surface temperature and surface roughness. Deep groove ball bearings in their movement, the outer ring relative sliding friction, the friction force is bigger; While other bearing in motion for liner layer and inner ring or outer ring under the relative sliding friction, the friction coefficient is small. Studies have shown that under the condition of same SKF bearing materials with different friction coefficient has the obvious difference, the liner material. With the continuous development of bearing, the wear mechanism and the form is also changing. In the process of work, general lubrication of bearings due to the relative sliding inner and outer ring, thus bearing working surface layer caused by material damage, lead to bearing cannot work normally. The main wear form is adhesive wear and abrasive wear and corrosion wear three types. Deep groove ball bearing wear is work due to the relative sliding liner with inner and outer ring, that cause the liner's fall off, the failure forms, such as tear, extrusion cause bearing cannot work normally. The role of bearing lubrication can be illustrated briefly as follows: a. The contact between two rolling or sliding surface formed between a layer of oil film separates two surface, reduce the friction and wear of contact surface. b。 Using oil lubrication, especially the circulating oil lubrication, oil mist lubrication and oil lubrication, the lubricant can take most of the deep groove ball bearing internal friction heat, effective heat dissipation effect. c。 Using grease lubrication, can prevent external dust and other foreign body into the bearings, sealing effect. d。 Lubricant function to prevent corrosion of metal. e. Extend the fatigue life of bearing. As is known to all, always save to dial gauge head for its working surface in proper positions of the deep groove ball bearing end face or shaft, even adopted the contemporary most advanced manufacturing technology and processing SKF bearing parts. Observe the reading with pre-tightening load variation method. Preloaded method has its negative aspects, such as increased import bearing friction torque, increase temperature, shorten the service life and so on, so should fully consider, have different levels of small geometric error, roller bearing and measurement of clearance, the rotating shaft and bearing box to each in a different direction for weeks, to ensure that the ball end deep groove ball bearing with the guide flange on the inner ring with the proper contact. Self-lubricating layer thinning, increasing of SKF bearing wear depth. Bearing failure, therefore, the reason is that the PTFE constantly in the process of swinging out, lubrication function to drop, eventually lead to weave matrix material wear.