Bearing instllation


 Bearings must be installed in a dry, clean environment. Care should be taken prior to installation to check the mating surfaces of the shaft and housing, the end faces of the shoulders, the quality of the grooves and connecting surfaces. All mating surfaces must be carefully cleaned and deburred, castings must be cleaned of virgin surface sand.
Bearings should be installed before using gasoline or kerosene clean, dry use, and ensure good lubrication, the bearing is generally used for grease lubrication, oil lubrication can also be used. Grease lubrication, should be selected without impurities, anti-oxidation, rust, extreme pressure and other excellent performance grease. Grease filling capacity for the bearing and bearing box 30% -60%, not too much. Double row tapered roller bearings with sealed structure and pump shaft bearing have been filled with grease, the user can directly use, can not be cleaned.
Bearing installation, you must exert an equal pressure on the circumference of the ferrule end face, the ferrule pressed into, must not use the first head and other tools directly hit the bearing face, so as not to damage the bearings. In the case of a small amount of interference, the sleeve can withstand the bearing ring at room temperature with the end face, with the head tapping the sleeve, the sleeve through the ring into a balanced pressure. If the high-volume installation, hydraulic machine can be used. When pressed in, should ensure that the outer ring end face and the shell shoulder end face, the inner ring end face and the shaft shoulder end face compact, does not allow a gap.
When the interference is larger, the oil bath heating or sensor heating method can be used to install the heating temperature range of 80 ℃ -100 ℃, the maximum can not exceed 120 ℃. At the same time, the use of nuts or other appropriate method of fastening the bearing to prevent the bearing cooling shrinkage in the width direction between the ring and the shoulder gap.
Single row tapered roller bearing installation should finally be carried out clearance adjustment. Clearance value should be based on different conditions of use and the size of the interference with the specific to determine. When necessary, should be tested to determine. Double row tapered roller bearings and pump shaft bearings have been adjusted in the factory clearance, no need to adjust the installation. After installation, the bearing should be subjected to rotation test. First, it should be used on the rotating shaft or bearing housing. If there is no abnormality, the bearing should be powered at no-load and low-speed. Then, the rotation speed and load should be gradually increased depending on the operation condition. Noise, vibration and temperature rise , Found abnormal, should stop running and check. Operation test after normal delivery.