Bearings must be installed in a dry and clean environment. Before installation, attention should be paid to checking the mating surface of the shaft and housing, the end face of the shoulder, the quality of the groove, and the connection surface. A surface must be carefully cleaned and removed to remove burrs. In addition to clean sand, the unprocessed surface must also be removed. Before using gasoline or kerosene for the first time, bearings should be installed, cleaned and dried after use, and ensure good lubrication of the shaft. Generally, lubricating grease can also be used for bearings. When using grease lubrication, it is recommended to use lubricating grease with excellent properties such as impurity free, antioxidant, anti sparsity, extreme pressure, etc. The filling capacity of lubricating grease should not be too much, with a capacity of 30% -60% of the volume of the bearing and bearing box. Double row tapered roller bearings and water pump sealing structure bearings have been filled with lubricating grease. Users can go straight and do not use cleaning. The bearing must be equipped with equal pressure on the circumference of the ring end face. Use a hammer and other tools to directly hit the bearing end to avoid damaging the bearing. In this case, with minimal interference, press the sleeve onto it at room temperature. Use a sleeve to press the sleeve through it. If installed in large quantities, hydraulic presses can be used. In the case of compression fit, the end face of the outer ring and the inner surface of the shell should be fixed, and the compression of the end face of the ring and the shoulder end face should not allow any gap. When using oil bath heating or sensor heating methods to install heating temperature, an interference fan can be used. The ambient temperature should be between 80 ℃ and 100 ℃, with a maximum of 120 ℃. Tighten the shaft with nuts or other suitable methods to prevent the direction of journal contraction and the gap between the shoulders after bearing cooling. The installation of single row tapered roller bearings should adjust the final clearance. The customs clearance value should be determined based on the usage of different workers and the specific size of interference. If necessary, testing should be conducted to determine. The clearance between the double row tapered roller bearing and the water pump shaft bearing has been adjusted and installed at the factory, so there is no need for adjustment. After installing the bearings, a rotation test should be conducted on the rotating shaft or bearing seat first. Force no-load operation, low-speed operation, and gradually increase the speed and load. Measure and detect noise, vibration, and temperature rise. If any abnormalities are found, stop running and inspect. The pre delivery running test is normal.
Using bearing environment
The selection of dimensions, accuracy, and appropriate bearings based on the components used, usage conditions, and environmental conditions is a prerequisite for consistent bearing life and feasibility.
1. Location of use
Conical roller bearings are suitable for radial and axial loads. Bearings are mainly used for driving moving parts such as front and rear wheel hubs, active bevel gears, differentials, and reducers.
2. Permissible speed
Under correct installation and good lubrication environment, the bearing speed limit is allowed to be between 0.3 and 0.5 times. Under normal circumstances, the maximum speed is most suitable at 0.2 times.
3. Allow tilt angle
Conical roller bearings generally do not allow the shaft to tilt or tilt relative to the housing hole, with a maximum of 2 '.
4. Permissible temperature
Under normal working conditions, normal loads and lubricants have high temperature resistance and sufficient lubrication, allowing for operation in ambient temperatures ranging from -30 ° C to 150 ° C.
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