Tapered roller bearings are designed to bear heavy loads. At the same width, this kind of bearing has extremely high bearing capacity, small radial section, and can save space compared with the traditional type of belt cage bearing, but the speed is relatively low. In order to make bearings work normally, in the case of continuous operation, bearings must bear a certain minimum load, that is, C/P<25. Otherwise wear will be aggravated by insufficient lubrication and high speed operation. All multi-row cylindrical roller bearings have a lubrication groove and a lubrication hole on the outer ring.

Precautions for installation and use

1. The installation of bearings must be carried out in dry and clean environmental conditions. Before installation, carefully check the machining quality of the shaft and shell matching surface, the end face of the convex shoulder, the groove and the connecting surface. All fitting surfaces must be carefully cleaned and burr removed, and the raw surface of the casting must be cleaned of molding sand.

2. Bearings should be cleaned with gasoline or kerosene before installation, used after drying, and ensure good lubrication. Bearings are generally lubricated by grease, and can also be lubricated by oil. 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, which should not be too much. The double row tapered roller bearing with sealed structure and the bearing connected to the water pump shaft have been filled with grease, users can directly use, can not be cleaned.

3, bearing installation, it must be in the ring width on the circumference of a circle of equal pressure, to press the ring into, can not use ð ¨ +  top tools directly on bearing face, in order to avoid damage In the case of a small amount of interference, but at room temperature with the sleeve pin bearing ring end face, with a ð ¨ +  head banging on sleeve, through the sleeve ring is balanced If mass installation, can use hydraulic press. When pressing, it 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 are compressed, and no clearance is allowed.

4, when the interference is large, can use oil bath heating or inductor heating bearing method to install, heating temperature range of 80℃-100℃, 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 shaft shoulder.

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

6, bearings should be installed after rotation test, first used for rotating shaft or bearing box, if there is no abnormal, with power load, low speed operation, and then according to the operation condition gradually improve the rotation speed and load, and detect noise, vibration and temperature rise, abnormal, should stop running and check. After normal operation test, it can be delivered to use.