Bearing fault judgment standard operation

Bearing failure is often the result of many factors, all of the design and manufacture of the influence of technological factors and bearing faults, their analysis is not easy to determine. Under normal circumstances, in general, you can consider and analyze the factors and internal factors. Used to adjust the main factor is the installation, use and maintenance, maintenance, such as conform to technical requirements. Installation conditions is one of the factors of using bearing is often caused by incorrect installation package state changes between each part of the primary factor of bearing capacity, the abnormal state of operation and early failure. According to the bearing installation, use, maintenance, maintenance of the technical requirements of operation of the bearing contact load, speed, temperature, vibration, noise and lubrication condition monitoring and inspection, found that abnormal immediately to find the reason, adjust back to normal. In addition, the quality of oil and the surrounding medium, the analysis of the atmosphere is also very important tests. Bearing the chamfer does not determine the quality of the bearing, but it reflects the bearing processing method. Chamfering is black, the heat treatment such as quenching hardness of this bearing, and some people think the chamfering is black not good-looking is not process completely, this is a myth. A cage is better than two body, although the new process using one cage, but it is just to save material, and performance than the difference between the two bodies such as the rotary. Bearing chamfer does not determine the quality of the bearing, and some people think the chamfering is black not good-looking is not process completely, this is a myth. Internal factors mainly refers to the structure design, the quality of the workmanship and materials, there are three factors determine the quality of the bearing. First, the structure design and advanced at the same time, there will be a long bearing life. Bearing manufacturing through forging, heat treatment, cutting, grinding and assembly process operation. The rationality of the processing, advanced, stability will also affect the service life of bearing. Affect the bearing heat treatment and grinding process, often associated with bearing fault more direct relationship with the quality of the product. In recent years, the deterioration of the surface layer of the bearing show that the grinding process is closely related to the bearing surface quality. Is the main factor influencing the quality of bearing material metallurgy rolling bearing early failure. With the progress of metallurgical technology ( Such as bearing steel, vacuum degassing, etc. ) , improve the quality of the raw materials. The proportion of raw materials quality factors in the analysis of the bearing is markedly reduced, but it is still one of the main factors of bearing failure. Choose proper is still bearing failure analysis must be considered. Bearings after installation, in order to check whether installed correctly, check for running. Small mechanical can rotate with the hand, to confirm whether to rotate smoothly. Check project has caused by foreign bodies, scars, creasing seized up, due to bad installation, installation of seat processing bad moment is not stable, because the clearance is too small, installation error, seal friction caused by the torque is too big, and so on. If there is no abnormal can start power operation. Remove the bearing under repair, the first record bearing appearance, confirm the residual stock of lubricant, sampling inspection with lubricant, bearing. Common use gasoline, kerosene as a cleaning agent. Tear open come down to the bearing cleaning, coarse and fine fine cleaning cleaning, respectively in the container, first put on the metal mesh at the bottom of the bearing is not direct contact with dirt from the container. Coarse when cleaning, if to spin bearing with dirt, can damage the bearing rolling surface, should be pay attention to. In coarse clean oil, use a brush to remove grease, adhesive, after clean, roughly into fine cleaning). Fine cleaning, bearing side rotation in the cleaning of oil, while carefully cleaned. In addition, the clean oil is always kept clean. In order to judge whether the bearing of the removed can be used again, check after bearing clean, carefully check the raceway surface, rolling surface, cooperate with the state, the abrasion of cage, the increase of the bearing clearance, and presence of dimensional precision, abnormal falling damage. Not separated type ball bearing, the inner ring with one hand support levels, rotate the outer ring confirm whether smooth. Bearing separation type bearing, rolling body, the outer ring raceway surface can be check respectively, large bearing can't rotate with the hand, pay attention to check the rolling element and raceway and the appearance, such as, cage, guard the importance of bearing high must check carefully. Large machinery from manual rotation, so after no-load start immediately cut off the power, machine idle, check whether there is presence of vibration, noise, rotating parts contact, etc. , confirmed after no abnormalities, into power operation. Dynamic operation, from the beginning of the no-load speed, slowly up to the rated operating conditions. Test run to check the items, whether there is abnormal sound, the change of bearing temperature, lubricant leakage or discoloration, and so on. If discovery is unusual, should immediately stop, check machine, when it is necessary to remove the bearing inspection.