Tapered roller bearings, pump shaft bearing installation

First, the bearing installation: Bearing installation must be dry, clean environment conditions. Care should be taken before installation to check the mating surfaces of the shaft and housing sliding self-lubricating bearings, the end faces of the shoulders, the machined 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 oil-free composite bush dry use, and ensure good lubrication, bearings are 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 be in the ferrule end of the sliding oil-free bearing circumference to exert an equal pressure on the ferrule pressed into the first tool may not be used directly on the bearing end 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 so that the gap between the collar and the shoulder

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 box. If there is no abnormality, the bearing should be powered at no-load and low-speed. Then, the rotating 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.

Second, the bearing removal: After the bearing is removed to be continued to use, should use the appropriate removal tool. Remove the interference with the ferrule, tension can only be added to the ferrule, transmission of disassembly force will never be allowed through the rolling element, otherwise the rolling element and raceway will be crushed.

Third, the use of the bearing environment: According to the use of parts and the use of environmental conditions and the choice of size, precision, with appropriate bearings is to ensure the bearing life and reliability of the premise.

1, the use of parts: tapered roller bearings for radial load to bear the radial and axial joint load, usually two sets of bearings used in pairs, mainly in front and rear wheels of the car, driving bevel gear, differential Gear reducer and other transmission parts.

2, Allowable speed: In the installation of correct, well-lubricated environment, allowing the bearing speed limit of 0.3-0.5 times. Under normal circumstances, to 0.2 times the speed limit for the most appropriate.

3, to allow tilt angle: Tapered roller bearings generally do not allow shaft relative housing hole tilt, if tilt, the maximum does not exceed 2 '.

4, the allowable temperature: In the normal load, and the lubricant has high temperature performance, and lubrication conditions, the general bearing allows -30 ℃ -150 ℃ ambient temperature work.