Service environment of Koyo bearing: select the specifications, Skills Of Koyo Bearing dimensions and accuracy according to the service parts, service conditions and environmental conditions.
1. Application position: tapered roller bearing is suitable for bearing the combined radial and axial load Skills Of Koyo Bearing dominated by radial load. It is usually used in pairs with two sets of Koyo bearings. It is mainly used in the transmission parts of automobile, such as front and rear hubs, driving bevel gears, 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 limit speed of Koyo bearing. Under normal Skills Of Koyo Bearing conditions, it is appropriate to use 0.2 times of the limit speed.
3. Allowable inclination angle: Skills Of Koyo Bearing 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, general Skills Of Koyo Bearing Koyo bearing is allowed to work at the ambient temperature of – 30 ℃ – 150 ℃.
The installation of Koyo bearings must be carried out 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. All mating connection surfaces must be carefully cleaned and deburred, and the unprocessed surface of the casting must be cleaned of molding sand.
Koyo bearings shall be cleaned with gasoline or kerosene before installation and used after drying, and good lubrication shall be ensured. Koyo bearings are generally lubricated with grease or oil. When grease lubrication is used, grease with excellent properties 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 Skills Of Koyo Bearing connecting bearing have been filled with grease, which can be used directly by users and can not be cleaned.
During the installation of Koyo bearing, equal pressure must be applied on the circumference of the Skills Of Koyo Bearing ring end face to press the ring in. It is not allowed to directly knock the Koyo bearing end face with hammer and other tools to avoid damaging the Koyo bearing.
When the interference is small, press the end face of the Koyo bearing ring with the sleeve at room temperature, Skills Of Koyo Bearing 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 Skills Of Koyo Bearing shoulder are pressed tightly without clearance.
When the interference is large, the Koyo bearing can be installed by oil bath heating or inductor heating. The heating temperature range is 80 ℃ – 100 ℃, and the height cannot exceed 120 ℃. At the same time, the Koyo bearing shall be fastened with nuts or other appropriate methods 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. If necessary, tests shall be carried out to determine. The clearance of double row tapered roller bearing and water pump shaft connected Koyo bearing has been adjusted before delivery, so it is not necessary to adjust it during installation.
After the installation of Koyo bearing, the rotation test shall be carried out. First, it shall be used for the rotating shaft or Koyo bearing box. 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 Koyo bearing is to be used again after disassembly, appropriate disassembly tools shall be selected. When removing the interference fit ferrule, only the tension can be added to the ferrule, and it is not allowed to transfer the disassembly force through the rolling element, otherwise the rolling element and raceway will be crushed.