Rolling bearings are used in various mechanical equipment. The conditions required for bearings are becoming increasingly strict, and the performance of bearings is becoming increasingly diversified.
To select the most suitable bearing from a large number of structures and sizes, different perspectives are required.
When selecting a bearing, it is generally considered that as a bearing, the difficulty of installation and disassembly is arranged, the bearing size and the bearing market, and other space allowable, generally determine the bearing structure.
A comparative study of the design life and limitations of various durable bearings used in various machinery while determining bearing size. When selecting bearings, bearings often tend to think that aging occurs in the grease life, the fatigue life of the grease, wear resistance, and low noise also need to be fully studied.
In addition, according to different uses, it is necessary to select specially designed bearings that have requirements in terms of accuracy, clearance, cage structure, grease, etc. However, there is no certain order or rule for selecting bearings. Priority should be given to the conditions, performance, and related matters required by the bearing, especially practicality. Just keep the original performance of the bearing as intact as possible.
Keeping and maintenance should be in the first place to prevent accidents, ensure operational reliability, improve productivity, and economy. Corresponding mechanical operation and maintenance work standards, regularly, and in the best possible conditions. This includes monitoring operating status, replenishing or replacing lubricants, and regular inspection and removal. As a matter of maintenance operations, the bearing rotation sound, vibration, temperature, lubrication conditions, etc.
Bearing cleaning: remove the bearing for repair, record the appearance of the bearing for the first time, confirm the remaining amount of lubricant, sample the lubricant used after inspection, and clean the bearing. As cleaning agents, gasoline and kerosene are generally used. Remove the bearing for cleaning, clean and finely clean the sub-thickness, place it in a container, and put the bottom of the metal mesh first so that the dirt in the container does not directly contact the bearing.
If the bearing rotates with dirt and damages the rolling surface of the bearing, you should pay attention. In crude oil cleaning, use a brush to remove grease, sticky materials, general cleaning, and wash into fines. Fine cleaning is to wash the oil on one side of the bearing while rotating it, and clean it carefully on the other side.
Note: The cleaning oil must be kept clean
Bearing maintenance and judgment: To determine whether the bearing can be disassembled and inspected after cleaning.
Check the raceway, raceway, surface condition, cage wear, bearing clearance and dimensional accuracy improvement, has nothing to do with damage, abnormalities. For non-separable small ball bearings, the bearing inner ring is supported horizontally with one hand and the outer ring is rotated to confirm smoothness.
For bearings such as tapered roller bearings and other separable bearings that can roll the body, the raceway surface of the outer ring was inspected. Because large bearings cannot be rotated by hand, pay attention to checking the appearance of the rolling elements, raceways, cages, and walls. The higher the importance of the bearing, the more carefully the bearing should be inspected.
