Timken bearing is a precision part, which requires considerable caution in use, that is, it uses a high-performance bearing. If it is not used properly, it can not achieve the expected performance effect, and it is easy to damage the outer spherical bearing.
Most bearings are broken for many reasons – exceeding the original estimated load, ineffective sealing, too small bearing clearance caused by too tight fit, etc. Any of these factors has its special damage type and will leave special damage traces.
Therefore, by examining the damaged bearings, we can find the possible causes in most cases. Generally speaking, one third of Timken bearings are damaged due to fatigue damage, another third due to poor lubrication, and the other third due to pollutants entering the outer spherical bearing or improper installation and treatment.
Therefore, we want to talk about how to protect it and prolong its service life. Who is not willing to make the bearing wear-resistant and durable? The following matters should be paid attention to when using the bearing:
If the bearing is not used properly in operation, it will produce a series of problems, so we should pay attention to these problems in order to find and solve the problems in time, so as to ensure the normal use of the bearing. In general, the following three matters should be paid attention to in the operation of outer spherical bearing.
First, check the condition of the machine in operation and monitor it to avoid equipment shutdown.
the lubricant contains magazines, the load is too large, the outer spherical bearing is damaged, the clearance is insufficient, and the high-temperature friction caused by oil seal, etc.
High temperature often indicates that the bearing is in abnormal condition High temperatures are also harmful to lubricants in bearings. Sometimes bearing overheating can be attributed to the lubricant of the bearing If the bearing operates for a long time at a temperature of more than 125 ℃, the service life of the bearing will be reduced.
Third, when opening the bearing housing, check the Timken bearing and regularly check the oil seal. Check the condition of the oil seal near the bearing to ensure that they are sufficient to prevent hot liquid or corrosive liquid or gas from penetrating into the outer spherical bearing along the axis.
If the bearing is well lubricated and properly blocks sundries and moisture, it means that the oil seal should not be worn, If the oil seal is worn, replace it as soon as possible.
1. Bearing cleaning
When disassembling the lower self-aligning roller bearing for maintenance, first record the appearance of fag 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 is divided into coarse cleaning and fine cleaning. Put the metal mesh pad bottom in the Outer Spherical Bearing container respectively, so that the fag bearing does not directly contact the dirt of the container.
During rough 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. Outer Spherical Bearing After it is roughly clean, turn to fine cleaning.
Fine cleaning is to carefully clean the self-aligning roller bearing while rotating in the cleaning oil. In addition, the cleaning oil should always be kept clean.
2. Maintenance and judgment of bearing
In order to judge whether the disassembled self-aligning roller bearing can be reused, it is necessary to check after the bearing is cleaned, and carefully check the state of raceway surface, rolling surface and mating surface, the wear of cage, the increase of clearance of fag bearing and
whether there are damages and Outer Spherical Bearing abnormalities related to the decline of dimensional accuracy. For non separable small ball bearing, support the inner ring horizontally with one hand and rotate the outer ring to confirm whether it is smooth.
For split bearings such as self- Outer Spherical Bearingaligning roller bearings, the raceway surfaces of rolling elements and outer rings can be inspected respectively.
Since large bearings cannot be rotated by hand, pay attention to the appearance of rolling elements, raceways, cages, retaining surfaces, etc. the higher the importance of fag bearings, the more careful the inspection is.
The judgment of whether the bearing can be reused is determined by considering the damage degree, mechanical performance, importance, operating conditions and the period until the next maintenance. However, if there are the following defects, they can no longer be used, and the self-aligning roller bearing must be replaced with a new one:
(a) Cracks or notches on any one of the inner ring, outer ring, rolling element and cage;
(b) Any one of the ferrule and rolling element is broken;
(c) There is significant jamming on the raceway surface, retaining edge and rolling body;
(d) Significant wear of cage or significant relaxation of rivets;
(e) There is rust and damage on the raceway surface and rolling element;
(f) There are serious indentation and indentation on the raceway surface and rolling element;
(g) There is obvious creep on the inner diameter surface of the inner ring or the outer diameter surface of the outer ring;
(h) Obvious discoloration caused by heat;
(i) The bearing, sealing ring or dust cover sealed with grease is obviously damaged.
If there is no wrong selection and can be used correctly, it can be used for a long time before the end of the service life of fag bearing. In this case, the damage state of self-aligning roller bearing is peeling. On the other hand, there is an early injury that can not stand the use of accidental early injury as the cause of the early injury.
The specific reasons include insufficient consideration of use and lubrication, foreign matter intrusion, large bearing assembly error and shaft deflection, insufficient research on shaft and bearing housing, etc. it can be said that these reasons overlap with each other.
Therefore, we suggest that you choose the size of the bearing according to the service life formula of fag bearing, and on the basis of fully understanding the machine used by the self-aligning roller Outer Spherical Bearing bearing, the service conditions and the structure around the bearing,
if you can understand the situation before and after the accident, and then investigate the damage of the bearing and various reasons, you Outer Spherical Bearing can prevent the recurrence of similar accidents.