Self-aligning ball bearing fault causes and operation key points of inspection and daily maintenance skills - bearing knowledge

by:Waxing     2020-05-27
TIMKEN 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. 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, self-aligning ball 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. TIMKEN bearing temperature, average according to the external temperature of the bearing. But using the oil hole directly measuring the temperature of the bearing outer ring more accurate. The bearing temperature, starting operation gradually increases, usually 1 ~ 2 hours after the temperature stability. If the bearing installation, the temperature will rise sharply, abnormal high temperature. The reason such as lubricant, bearing clearance is too small, too much bad installation, excessive friction sealing device, etc. High-speed rotation, TIMKEN bearing structure, selection of lubrication method error is also the reason. TIMKEN bearing examination such as the rotation of the sound with a stethoscope, a strong metal noise, such as vision, irregular note that exception. Its reason has poor lubrication, shaft or precision bearing, bearing damage, foreign body intrusion, etc. Under the action of transient high temperature of the surface of the steel and the oxygen in the air, rises into extremely thin ( 20~30nm) The iron oxide thin layer. It is worth noting that the oxide layer thickness and surface grinding metamorphic layer is the total thickness test results in corresponding relation. This shows that the thickness of oxide layer, is directly related to the grinding process is an important symbol of grinding quality. 1, first of all have to really self-aligning ball bearing, if you buy the fake bearing on how to do can live longer. 2, before installing the bearing, the first thing to check whether the bearing is short of oil, clean, and then check to install the machine parts, determine the good and clean grease, bearing correct installation. 3, bearing the trial, after installation, bearing the trial running, running for a while check found nothing abnormal, the bearing into a state can be normal use. 4, check regularly, every kind of TIMKEN bearing lubrication is critical, bearing is not exceptional also, in the maintenance of the bearing, the first thing to check whether the bearing surface is clean, if not clean, then use gasoline or alcohol rinse again first, and then is crucial, is the grease. Do not have to bearing grease more grease, as long as a little grease on friction between the two, if the presence of pollutants, can be felt. For self-aligning ball bearing grease, should be avoided with any part of the cotton fabrics in contact with the bearing, it will make some residual fiber on rolling and likely to cause damage. Best determine an inspection time, then according to the normal time to check whether the lack of oil is clean, well do the self-aligning ball bearing can live longer.
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