The use and installation of bolt roller bearings should pay attention to six problems

Full complement cylindrical roller bearings are designed to withstand heavy loads. Under the same width, this kind of bearing has extremely high bearing capacity compared with the traditional bearing with cage, and the radial section is small, which can save space, but the speed is relatively low. All multi-row cylindrical roller bearings have a lubrication groove and lubrication holes in the outer ring. 1. The installation of the bearing must be carried out in a dry and clean environment. Before installation, the machining quality of the mating surfaces of the shaft and the housing, the end faces of the shoulders, the grooves and the connecting surfaces should be carefully checked. All mating surfaces must be carefully cleaned and deburred, and unmachined surfaces of castings must be free of sand. 2. Before the bearing is installed, it should be cleaned with gasoline or kerosene, used after drying, and ensure good lubrication. The bearing is generally lubricated with grease, but also can be lubricated with oil. When using grease lubrication, the grease with excellent performance such as no impurities, anti-oxidation, anti-rust and extreme pressure should be used. The filling amount of grease is 30%-60% of the bearing and bearing housing volume, and should not be too much. The double row tapered roller bearing with sealed structure and the water pump shaft bearing have been filled with grease, which can be directly used by the user and cannot be cleaned again. 3. When the bearing is installed, an equal pressure must be applied on the circumference of the end face of the ferrule, and the ferrule must be pressed in. It is not allowed to directly hit the end face of the bearing with tools such as a hammer to avoid damage to the bearing. In the case of a small amount of interference, the end face of the bearing ring can be pressed with a sleeve at room temperature, and the sleeve can be hit with a hammer head to press the ring evenly through the sleeve. If installed in large quantities, hydraulic presses can be used. When pressing in, it should be ensured that the end face of the outer ring and the end face of the shoulder of the shell, and the end face of the inner ring and the end face of the shaft shoulder are pressed tightly, and no gap is allowed. 4. When the amount of interference is large, oil bath heating or sensor heating bearing method can be used for installation. The heating temperature range is 80℃-100℃, and cannot exceed 120℃. At the same time, tighten the bearing with nuts or other suitable methods to prevent the bearing from shrinking in the width direction after cooling and causing a gap between the ring and the shaft shoulder. 5. The clearance of single row tapered roller bearings should be adjusted. The clearance value should be determined according to different operating conditions and the size of the interference. When necessary, tests should be carried out to determine. The double-row tapered roller bearing and the water pump shaft bearing have been adjusted for clearance at the factory, and do not need to be adjusted during installation. 6. After the bearing is installed, the rotation test should be carried out. First, it should be used for the rotating shaft or bearing box. If there is no abnormality, it will be operated with power without load and at low speed, and then gradually increase the rotation speed and load according to the operation conditions, and detect noise, vibration and If the temperature rises and an abnormality is found, the operation should be stopped and checked. It can be delivered for use only after the running test is normal.

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