The meaning of the rolling bearing fault diagnosis

Rolling bearing as the rotation of the important parts in machinery and equipment, is one of the important source of trouble of mechanical equipment. Compared with other parts in the machinery, rolling bearing has a big characteristic, is the life of discreteness. Some bearing has been by far more than design life work is still intact, and some bearing is far from to meet the design life will appear all sorts of reason. So the rolling bearing fault diagnosis method has been one of the focus on the development of technology in mechanical fault diagnosis. Statistics: in rotating machinery fault, about 30% are caused by the rolling bearing, the fault of induction motor fault caused by dynamic bearing in accounting for about 40% of the motor fault, gear box on the failure of various bearing failure rate second only to the gear wheel and accounted for 20%. According to relevant data show that China's existing locomotive with rolling bearings, about 40% a year under vehicle inspection, and about 33% of applicants to be replaced. So the locomotive bearing fault monitoring and diagnosis, regular maintenance for the state maintenance, have important economic and practical value. According to the statistics, the application of mechanical equipment condition monitoring and fault after breaking technology, accident rate was reduced by 75%, maintenance cost decreased by 25% ~ 50%. Of rolling bearing condition monitoring and fault diagnosis technology in understanding the performance of the bearing status and timely found potential fault plays an important role, but also can effectively improve the operation of the machinery and equipment management level and efficiency of maintenance, thus significantly improve the economic benefit.