The usage methods of double row tapered roller bearings mainly include installation, use, and maintenance. The following is a detailed explanation of the usage method of double row tapered roller bearings:
1、 Installation method
Preparation stage:
Before installation, ensure that the work area is dry and clean, and prepare necessary installation tools.
Carefully inspect the machining quality of the bearings and their mating components, including the mating surfaces of the shaft and housing, the end faces of the shoulders, grooves, and connecting surfaces. These surfaces must be free of burrs, oil stains, and impurities.
For bearings that require lubrication, make sure to use the appropriate grease and fill it according to the specified amount. Double row tapered roller bearings are usually filled with lubricating grease before leaving the factory, and users can use them directly, but should avoid cleaning them again.
Installation steps:
When installing, ensure that the components of the bearing are installed in the correct order and orientation. For example, the inner ring, outer ring, and spacer should be installed in the bearing housing in sequence and cannot be interchanged arbitrarily.
When pressing the bearing, equal pressure should be applied on the circumference of the ring end face to avoid using tools such as hammers to directly strike the bearing end face, in order to avoid damaging the bearing.
For bearings with large interference fit, oil bath heating or sensor heating methods can be used for installation. The heating temperature should be controlled between 80 ℃ and 100 ℃, with a maximum of 120 ℃. After heating, the bearing should be quickly installed on the shaft and fastened with nuts or other methods to prevent the bearing from shrinking in the width direction and creating gaps after cooling.
Clearance adjustment:
Double row tapered roller bearings usually have the clearance adjusted before leaving the factory, and users do not need to adjust it again. But in some special cases, such as when the user needs to change the preload of the bearing or when the working conditions change, the clearance can be adjusted according to the actual situation. When adjusting, methods such as adjusting nuts, adjusting washers, or pre tightening springs can be used.
2、 Usage method
Load bearing capacity:
Double row tapered roller bearings can withstand radial loads and bidirectional axial loads. During use, it should be ensured that the load borne by the bearing does not exceed its rated load to avoid bearing damage.
Operating speed:
The operating speed of the bearing should be controlled within the allowable range. In general, the operating speed of a bearing should not exceed 0.3-0.5 times its limit speed (some say that a limit speed of 0.2 times is the most appropriate). The specific operating speed should be determined based on the model, specifications, and usage conditions of the bearing.
Usage environment:
Bearings should be used within the specified ambient temperature range. Under normal load conditions and with high temperature resistance and sufficient lubrication of the lubricant, bearings are generally allowed to operate at ambient temperatures ranging from -30 ℃ to 150 ℃. Beyond this range, the lifespan and reliability of the bearings may be affected.
3、 Maintenance and upkeep
Regular inspection:
Regularly inspect bearings, including checking their operation, lubrication, wear, etc. When abnormalities are discovered, timely measures should be taken to handle them.
Cleaning and lubrication:
For bearings that need to be cleaned, clean solvents and tools should be used for cleaning, avoiding the use of corrosive cleaning agents. After cleaning, an appropriate amount of lubricating grease should be reapplied.
For bearings that require lubrication, lubrication should be carried out according to the prescribed lubrication cycle and method. Ensure that the filling amount of lubricating grease is appropriate, avoiding too much or too little.
Disassembly and replacement:
If bearings need to be disassembled, appropriate disassembly tools should be selected and the disassembly steps should be carried out according to the regulations. Avoid using hammers or other tools to directly strike the bearings to avoid damaging them.
For bearings that are damaged or severely worn, they should be replaced in a timely manner. When replacing, choose bearings of the same model and specifications as the original bearings, and ensure correct installation.
In summary, the usage methods of double row tapered roller bearings include correct installation, reasonable use, and maintenance. During use, it is necessary to strictly follow the instructions and operating procedures to ensure the normal operation of the bearings and extend their service life.