The reasons for the heating of Koyo bearing are different, so the solutions are also different. Therefore, it is still necessary to treat it on a case by case basis and complete it with the help of technicians.
Diagnosis and Maintenance Method of Using Heating of Koyo Needle Roller Bearing
If you carefully observe the running track, you will know that it only bears radial load, large axial load, moment load, or extreme uneven rigidity on the bearing housing.
It can be checked whether the needle roller bearing is added with unexpected load and whether the installation error is too large, which will become a clue to investigate the damage cause of Koyo bearing.Diagnosis and Maintenance Method of Using Heating of Koyo Needle Roller Bearing
1. Cleaning of Koyo bearing
When disassembling the lower Koyo bearing for maintenance, first record the appearance of the bearing, confirm the residual amount of lubricant, and wash the bearing after sampling the lubricant for inspection.
As a cleaning agent, gasoline and kerosene are commonly used. The cleaning of the removed bearing can be divided into coarse cleaning and fine cleaning.
Put the metal mesh pad on the bottom of the container respectively, so that the bearing does not directly contact the dirt of the container. During fine cleaning, if the bearing rotates with dirt, it will damage the rolling surface of the bearing, which should be paid attention to.
In the coarse cleaning oil, use a brush to remove the grease and adhesion. After it is roughly clean, turn to fine cleaning.Diagnosis and Maintenance Method of Using Heating of Koyo Needle Roller Bearing
Fine cleaning is to carefully clean the bearing while rotating in the cleaning oil. In addition, the cleaning oil should always be kept clean.Diagnosis and Maintenance Method of Using Heating of Koyo Needle Roller Bearing
Maintenance and judgment of Koyo bearing
In order to judge whether the disassembled bearing can be reused, check after the needle roller bearing is cleaned. Carefully check the state of raceway surface, rolling surface and mating surface, the wear of cage, the increase of bearing clearance and whether there are damages and abnormalities related to the decline of dimensional accuracy.
For non separable small ball bearings, support the inner ring horizontally with one hand and rotate the outer ring to confirm whether it is smooth.Diagnosis and Maintenance Method of Using Heating of Koyo Needle Roller Bearing
Excessive grease. Then it’s time to change the lubricant of the bearing. For needle roller bearings lubricated with engine oil, after draining the old engine oil, if possible, refill fresh engine oil and let the machine rotate at low speed for a few minutes.
Make the oil collect residual pollutants as much as possible, and then drain the oil. When replacing the grease of Koyo bearing lubricated with grease, the Joe remover used should avoid contacting any part of the outer spherical bearing with cotton.
Because these residual fibers may wedge between rolling parts and cause damage, especially in the application of small bearings.Diagnosis and Maintenance Method of Using Heating of Koyo Needle Roller Bearing
When using Koyo bearing, if it is to be used, the needle roller bearing must be checked to check its vibration amplitude, sound, temperature and lubricant (whether there is any change in color and viscosity and whether there are foreign matters). Remember, the amount of lubricant must be moderate.
More waste and less can not play its due role. In the process of use, do not exceed the limit speed, which will be damaged due to overheating or burns. If the working temperature exceeds 100 ℃, the oil should be replaced 2-3 times a year.
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