Correct installation and maintenance is the assurance of normal operation of needle bearing

by:Waxing     2020-05-23
The correct installation and maintenance is an important factor for normal operation of bearing, at the same time, must pay attention to maintain the purity of the bearing. Bearings must prevent polluted by contaminants and moisture, must have a correct installation and lubrication. Bearing network, moreover, experts believe that the design of the bearing arrangement, the condition of the oil seal, the form of a lubricant and change cycle and special maintenance also play an important role, must be attention. 1, 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. 2, large machines cannot 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, TIMKEN imports bearing temperature changes, 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. 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, imported bearing structure, selection of lubrication method error is also the reason. TIMKEN bearing import 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.
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