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First, the installation of spherical roller bearings
Spherical roller bearings must be installed in a dry, clean environment. The mating surface of the shaft and the outer casing, the end faces of the shoulders, the grooves and the joining surface must be carefully inspected before installation.
All mating joint surfaces must be carefully cleaned and burred removed. The unformed surface of the casting must be cleaned of sand.
Spherical roller bearings should be cleaned with gasoline or kerosene before installation, used after drying, and ensure good lubrication. Spherical roller bearings are generally greased or oil lubricated. Grease lubrication
When using grease with excellent properties such as no impurities, anti-oxidation, anti-rust and extreme pressure. The grease filling amount is 30%-60% of the volume of the spherical roller bearing and the spherical roller bearing housing, and should not be excessive.
When the spherical roller bearing is installed, it is necessary to apply equal pressure on the circumference of the end face of the ferrule to press the ferrule. Do not directly hit the end surface of the spherical roller bearing with a tool such as a boring head to avoid damage to the aligning roller.
In the case of a small amount of interference, the end face of the spherical roller bearing ring can be pressed with a sleeve at a normal temperature, the sleeve is tapped with a hammer, and the ring is evenly pressed through the sleeve. If you install in large quantities, you can A hydraulic press is used. When pressing in, ensure that the end face of the outer ring and the shoulder end face of the outer casing, the end face of the inner ring and the end face of the shoulder of the shaft are pressed tightly, and no gap is allowed.
When the interference is large, it can be installed by oil bath heating or inductor heating spherical roller bearing method. The heating temperature ranges from 80 °C to 100 °C, and the maximum temperature cannot exceed 120 °C. At the same time, apply the nut
Or other suitable method of fastening the spherical roller bearing to prevent the spherical roller bearing from shrinking in the width direction after cooling and causing a gap between the ferrule and the shoulder.
After the spherical roller bearing is installed, the rotation test should be carried out. Firstly, the shaft or the spherical roller bearing housing should be rotated. If there is no abnormality, the power will be run without load and at low speed, and then the rotation will be gradually increased depending on the operation.
Turn speed and load, and detect noise, vibration and temperature rise. If abnormality is found, stop operation and check. It can be used after the running test is normal.
Second, the disassembly of the spherical roller bearing
When the spherical roller bearing is removed and it is intended to continue to be used, the appropriate removal tool should be used. To remove the ferrule of the interference fit, only the tension can be applied to the ferrule, and the detachment force is never allowed to pass through the rolling element.
Otherwise, the rolling elements and raceways will be crushed.
Third, the use of spherical roller bearings
According to the use of parts and conditions of use and environmental conditions to select specifications and accuracy, with the appropriate spherical roller bearings is the premise to ensure the life and reliability of spherical roller bearings.
1, the use of parts
Spherical roller bearings are suitable for bearing radial and axial combined loads with radial loads. They are usually paired with two sets of spherical roller bearings, mainly for the front and rear hubs of the car, active conical teeth.
Wheels, differentials, reducers and other transmission parts.
2, allowable speed
In a properly installed and lubricated environment, it is allowed to be 0.3-0.5 times the limit speed of the spherical roller bearing. Under normal circumstances, it is best to use 0.2 times the limit speed.
3, allow the tilt angle
Spherical roller bearings generally do not allow the shaft to be tilted relative to the housing bore. If tilted, the maximum does not exceed 2'.
4, allow temperature
Under normal conditions, the lubricant has high temperature resistance and sufficient lubrication, the general spherical roller bearings are allowed to work at ambient temperature of -30 °C - 150 °C.