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What must be paid attention to during bearing installation and use

wallpapers Tech 2020-07-29
1. Bearings installation must be carried out in a dry and clean environment. Before installing the bearings, please carefully check the processing quality of the shaft and bearings seat mating surface, shoulder end, groove and joint surface. All mating surfaces must be carefully cleaned and burrs must be removed. The rough surface of the casting must be cleaned with sand.
 
2. The bearings should be cleaned with gasoline or kerosene before installation, and then used after drying, and ensure good lubrication. Bearings are generally lubricated with grease or oil. When using grease lubrication, the characteristics of the grease, such as impurities, oxidation resistance, rust prevention, and extreme pressure, should be selected. The filling amount of the grease is the double row of the bearings capacity and 30%-60% of the sealing structure of the bearing box The tapered roller bearings and the water pump shaft bearings have been filled with grease and can be used directly by the user and cannot be cleaned again.
 
3. For the installation of the bearings, the ring must be pressed in with equal pressure on the circumference of the width of the ring, and the top tool cannot be used directly on the bearing surface to avoid damage. In the case of a small amount of interference, But at room temperature, use the sleeve pin to hit the end face of the bearing ring, and hit the sleeve with the d¨+ head. The sleeve ring is balanced. If a large number of installations, hydraulic press can be used. When pressing, make sure that the end face of the outer ring and the end face of the shell shoulder, and the end face of the inner ring and the end face of the shaft shoulder are tightly facing each other, and no gap is allowed.
 
4. When the interference is large, the bearing can be installed by oil bath heating or induction heating. The heating temperature ranges from 80°C to 100°C, and the maximum temperature cannot exceed 120°C. At the same time, tighten the bearing with a nut or other appropriate method to prevent the bearing from shrinking and cooling in the width direction and forming a gap between the ring and the shoulder.
 
5. At the end of the installation of single-row tapered roller bearings, the clearance should be adjusted. The clearance value should be determined according to different working conditions and the size of the interference fit, and if necessary, it should be determined through experiments. Double-row tapered roller bearings and water pump shaft bearings have been adjusted before leaving the factory, and no adjustment is required during installation.
 
6. After the bearing is installed, a rotation test should be carried out. First, it should be used for rotating shafts or bearing boxes, and can be delivered for use after normal operation tests.

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Tag: Bearings