The stable working temperature of the bearing is the result of the common effect of various factors.
The main factor affecting the working temperature is:
Bearing type, lubrication type, operating factors, environmental conditions and maintenance levels of bearing type (roller, roller, sleeve, etc.), bearing installation method (sliding cooperation, adapter installation, pressure coordination, etc.), and auxiliary items (shells, sealing, sealing Pieces, protectives, oil rings, etc.) will affect the final working temperature.
For a set of given application conditions, a specific type of bearing will produce friction released in the form of heat.
For most industrial applications, the typical bearing temperature is 40 ° to 80 ° F (4 ° to 27 ° C). However, under extreme conditions, the bearing temperature can be observed as the ambient temperature is as high as 120 ° F (49 ° C).
It should be noted that when the bearing runs above the normal temperature, the service life may be affected due to the deterioration of the thickness and quality of the lubricating oil membrane. The selection of initial bearing should be selected for the number of hours with sufficient design life to reduce the life of compensation expected, or to choose a lubricant suitable for high-temperature operations.
The bearing may be exposed to abnormal high environmental temperatures or high-temperature equipment, such as furnaces, fans, ovens, blossoms, steel mills/casting foot wheels, rolling tables, dryers, motors, and generators. In many cases, the bearing is expected to operate above the limit of standard bearings.
If possible, measures to position the bearing outside the direct hot area or provide a measure to reduce bearing heat are the first choice for the best bearing service life performance.
This can be achieved through the insulation program to reduce radiation heat. In addition, the combination of the shaft heat sink or cooling wheel and heat-resistant shaft material can reduce the bearings' temperature.
The use of water-cooled or air-cooled bearing units is another method that reduces the bearing temperature to the scope of easier management.
When heat exposure cannot be avoided, the bearings can be specially modified to adapt to high-temperature applications. Bearing materials with optional components, special internal radial gaps, high-temperature lubricants, and special thermal treatment (if necessary) can be successfully operated at very high temperatures.
