Whether
the sliding bearing is available to judge, mainly to consider the
degree of one-way bearing damage, mechanical properties, importance,
operating conditions, to the next maintenance period and decide. If the following defects can not be used, you must replace the new sliding bearing. An inner ring, outer ring, rolling body, any of which has cracks or gaps on any one of the retainers.
Most
of the causes of bearing damage are many - beyond the original sliding
bearing estimated load, non-effective seal, too tight with the resulting
small sliding bearing clearance. Any of these factors have their own special damage type and will leave a special traces of damage. Therefore,
the inspection of the damaged shaft bearing, in most cases can be found
in its possible causes, in general, one-third of the one-way bearing
damage due to fatigue damage, the other one-third lead to lubrication Bad, the other one-third lead to contaminants into the bearing or improper installation.
The so-called sliding bearing bearing damage state is: bearing raceway
wheel, rolling body and composite bearing cage in the rotation of the
rapid heat until the discoloration, softening, welding and damage.
Followed by an excessively large load (preloaded too large). The speed is too large. The clearance is too small. There is water or other foreign body intrusion. If the above two cases are not so that is the shaft, the bearing box of poor accuracy, shaft deflection. See
here, I think we all want to know how to solve it, first of all, to
study the lubricant and lubrication methods, the choice of sliding
bearing lubricants, and its use, but also to correct the choice of
bearings. Research to match, bearing clearance and preload, and to improve the sealing device.
1, bearing maintenance: in order to as long as possible in good
condition to maintain the original performance of the bearing, to be
maintenance, maintenance, in order to prevent accidents in order to
ensure the reliability of operation, improve productivity, economy.
Maintenance of the best operating conditions of the corresponding mechanical operating conditions, regular. The
contents include monitoring the operating status, replenishing or
replacing the lubricant, and checking the inspection on a regular basis. Operation of the maintenance matters, there are one-way bearing
rotation, vibration, temperature, the state of the lubricant and so on.
2,
the maintenance of the sliding bearing: bearing cleaning: dismantling
the bearing repair, the first record the appearance of the bearing to
confirm the amount of residual lubricant, sampling inspection with the
lubricant, the washing bearings. As a cleaning agent, the general use of gasoline, kerosene.
Remove
the bearing cleaning, sub-rough cleaning and fine cleaning,
respectively, placed in the container, first put the metal bottom of the
net, so that the bearings do not directly contact the container dirt. Rough cleaning, if the bearing with a dirt rotation, will damage the bearing rolling surface, should be noted. In the rough cleaning oil, use the brush to remove the grease, sticky material, roughly clean, into the fine wash.
Fine wash, is the sliding bearing in the cleaning oil side of the rotation, while careful cleaning. In addition, cleaning oil should always be kept clean.
3,
sliding bearing maintenance and judgment: In order to determine whether
the demolition of the bearing can be used, to clean the bearing after
the clean check. Check
the raceway surface, rolling surface, with the surface of the state,
the wear of the cage, one-way bearing clearance increases and there is
no damage to the size of the accuracy of the damage, abnormal. Non-separation
of small ball bearings, then use one hand to support the inner ring
level, rotating the outer ring to confirm whether the smooth.
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