Installation of tapered roller bearings and water pump shaft bearings:

First of all, the installation environment of the bearing: the installation of the bearing must be carried out under dry and clean environmental conditions. Before installation, carefully check the processing quality of the shaft and shell matching surface, the end face of the shoulder, the groove and the connecting surface. All mating surfaces must be carefully cleaned and removed burrs, and the raw surface of the casting must be cleaned of molding sand.

Secondly, the bearing should be cleaned with gasoline or kerosene before installation, used after drying, and ensure good lubrication, bearings generally use grease lubrication, can also use oil lubrication. When using grease lubrication, grease with excellent performance such as no impurities, anti-oxidation, anti-rust and extreme pressure should be selected. The filling amount of grease is 30%-60% of the volume of bearings and bearing boxes, and should not be too much. The double row tapered roller bearing and the water pump shaft bearing with sealed structure have been filled with grease and can be used directly by the user and cannot be cleaned.

When the bearing is installed, equal pressure must be applied on the circumference of the ring end face, and the ring must be pressed into the bearing end face, and e¨± and other tools must not be used to directly hit the bearing end face to avoid damage to the shaft In the case of small interference, the sleeve can be pressed against the end face of the bearing ring at room temperature, and the sleeve can be beaten with the d ¨± head to balance the ring through the sleeve If large quantities of installation, can be used hydraulic press. When pressing in, it should be ensured that the outer ring end face and the shell shoulder end face, the inner ring end face and the shaft shoulder end face are pressed tightly, and no gap is allowed.

When the interference is large, it can be installed by oil bath heating or sensor heating bearing method, and the heating temperature range is 80℃-100℃, and the maximum can not exceed 120℃. At the same time, the bearing should be tightened by nuts or other appropriate methods to prevent the bearing from shrinking in the width direction after cooling, resulting in a gap between the ring and the shoulder.

The single row tapered roller bearing should be adjusted at the end of installation. The clearance value should be determined according to the different operating conditions and the size of the interference. If necessary, tests should be carried out to determine. Double row tapered roller bearings and water pump shaft coupling bearings have been adjusted before leaving the factory, and need not be adjusted during installation.

Bearings should be installed after the rotation test, first used for the rotating shaft or bearing box, if there is no abnormal, then the power to carry out no-load, low-speed operation, and then according to the operation condition gradually increase the rotation speed and load, and detect noise, vibration and temperature rise, found abnormal, should stop the operation and check. The operation test is normal before delivery.

Secondly, disassembly of bearings: when bearings are removed and intended to continue to be used, appropriate disassembly tools should be selected. Disassembling the ring of interference fit, only the tension can be applied to the ring, and the disassembling force must not be transmitted through the rolling body, otherwise the rolling body and the raceway will be crushed.

Third, the use of bearing environment: according to the use of parts and conditions of use and environmental conditions to select the size, accuracy, with the appropriate bearing is to ensure the bearing life and feasibility of the premise.

A, the use of parts: tapered roller bearings are suitable for bearing radial load mainly radial and axial combined load, usually with two sets of bearings used, mainly in the car front and rear wheels, active bevel gear, differential, reducer and other transmission parts.

B, allowable speed: in the correct installation, good lubrication environment, allowed for the bearing limit speed of 0.3-0.5 times. Under normal circumstances, 0.2 times the limit speed is the most appropriate.

C, allowed inclination Angle: tapered roller bearings generally do not allow the shaft relative to the shell hole tilt, if there is tilt, the maximum is not more than 2 ‘.

D, allowable temperature: under normal load, and the lubricant has high temperature resistance, and sufficient lubrication conditions, the general bearing is allowed to work at an ambient temperature of -30℃-150℃.