The installation of tapered roller bearing and water pump shaft connecting bearing shall Water Pump Shaft Bearing pay attention to the following aspects:
The bearing must be installed under dry and clean environmental conditions. Before installation, carefully check the machining quality of the mating surface of the shaft and housing, the end face of the shoulder, the groove and the connecting surface. Water Pump Shaft Bearing All mating and connecting surfaces must be carefully cleaned and deburred, and the residual molding sand must be removed from the unprocessed surface of the casting.
The bearing shall be cleaned with gasoline or kerosene before installation, and used after drying, and good lubrication shall be ensured. The bearing is generally lubricated with grease or oil. When grease lubrication is used, grease with high Water Pump Shaft Bearing performance such as no impurities, oxidation resistance, rust prevention and extreme pressure shall be selected.
The filling amount of lubricating grease shall be 30% – 60% of the volume of bearing and bearing box, and shall not be too much. Double row tapered roller bearing with sealing structure and water pump shaft Water Pump Shaft Bearing connecting bearing have been filled with grease, which can be used directly by users and can not be cleaned.
During bearing installation, equal pressure must be applied on the circumference of the ferrule end face to press the ferrule in. It is not allowed to directly knock the bearing Water Pump Shaft Bearing end face with hammer and other tools to avoid damaging the bearing.
When the interference is small, press the end face of the bearing ring with the sleeve at room temperature, knock the sleeve with a hammer, and press the ring evenly through the sleeve. In case of mass installation, hydraulic press can be used. When pressing in, ensure that the end face of the outer ring and the end face of the housing shoulder, and the end face of the inner ring and the end face of the shaft shoulder are pressed tightly without clearance.
When the interference is large, the bearing can be installed by oil bath heating or inductor heating. The heating temperature range is 80 ℃ – 100 ℃, and the high temperature cannot exceed 120 ℃. At the same time, tighten the bearing with nuts or other appropriate methods Water Pump Shaft Bearing to prevent the gap between the ferrule and the shaft shoulder due to the shrinkage in the width direction after the bearing is cooled.
The clearance of single row tapered roller bearing shall be adjusted after installation. The clearance value shall be determined according to different service conditions and the interference of the fit. Water Pump Shaft Bearing If necessary, tests shall be carried out to determine. The clearance of double row tapered roller bearing and water pump shaft bearing has been adjusted at the factory, so it is not necessary to adjust it during installation.
After the bearing is installed, the rotation test shall be carried out. First, rotate the shaft or bearing box by hand. If there is no abnormality, it shall run at no-load and low speed with power, and then gradually increase the rotation speed and load according to the operation, and detect the noise, vibration and temperature rise. If any abnormality is found, stop the operation and check it. It can be delivered for use only after the operation test is normal.
When the bearing is to be used after removal, appropriate removal tools shall be selected. When removing the inner ferrule of interference fit, only the tension can be Water Pump Shaft Bearing added to the ferrule, and it is not allowed to transfer the removal force through the rolling element (outer ring), otherwise the rolling element and raceway will be crushed.
The selection of specifications, dimensions and accuracy according to the service parts, service conditions and environmental conditions, and the matching of appropriate bearings are the premise to ensure the service life and reliability of bearings.
1. Application position: tapered roller bearing is suitable for bearing the combined radial and axial load dominated by radial load. It is usually used in pairs with two sets of bearings. It is mainly used in the transmission parts of automobile, such as front and rear hub, driving bevel gear, differential, reducer and so on.
2. Allowable speed: under the condition of correct installation and good lubrication, the allowable speed is 0.3-0.5 times of the bearing limit speed. Under normal conditions, it is appropriate to use 0.2 times of the limit speed.
3. Allowable inclination angle: generally, tapered roller bearings do not allow the shaft to tilt relative to the housing hole. If there is any inclination, the maximum inclination shall not exceed 2 ‘.
4. Allowable temperature: under the condition of bearing normal load, high temperature resistance of lubricant and sufficient lubrication, the general bearing is allowed to work at the ambient temperature of – 30 ℃ — 150 ℃.