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Bearings should be cleaned with gasoline or kerosene before installation
发布时间:2021-10-23浏览次数:0

NSK bearing installation must be carried out under the premise of dry and clean environment. Before installation, carefully check the machining quality of the mating surface of shaft and shell, the end face of convex shoulder, groove and connecting surface. All mating surfaces must be carefully cleaned and burrs removed, and the unprocessed surface of TIMKEN bearing castings must be cleaned of molding sand. Bearings should be cleaned with gasoline or kerosene before installation, and used after drying, and ensure good lubrication. TIMKEN bearings are generally lubricated with grease, but also can be lubricated with oil. When using grease lubrication, grease with no impurities, oxidation resistance, rust resistance, extreme pressure and other functions should be selected. The filling amount of grease is 30%-60% of the bearing and bearing box volume, not too much. Double row tapered roller bearings with sealed structure and pump shaft bearings have been filled with grease and can be used directly by users, not to be cleaned. When the bearing is installed, NSK bearing must apply equal pressure on the circumference of the end face of the ring, and press the ring into it. It is not allowed to directly knock the end face of the bearing with the first-class tool 𨱍 to avoid damage In the case of small interference, the end face of bearing ring can be pressed by a sleeve at room temperature, and the sleeve can be knocked by the sleeve to balance the ring If large quantities are installed, hydraulic presses can be used. When pressing in, it should ensure that the outer ring end face and shell shoulder end face, the inner ring end face and shaft shoulder end face are pressed tightly, no clearance is allowed. When the interference is large, the method of oil bath heating or inductor-heating bearing can be used to install. The heating temperature range of NSK bearing is 80℃-100℃, and the maximum cannot exceed 120℃. At the same time, the application of nuts or other appropriate methods to tighten the bearing, in order to prevent the bearing cooling after the width direction of contraction and the gap between the ring and the shaft shoulder. Clearance adjustment should be carried out at the end of installation of single row tapered roller bearings. The clearance value should be determined in detail according to different operating conditions and the size of interference. If necessary, tests should be carried out to determine. Double row tapered roller bearings and water pump shaft bearings have been adjusted at the factory clearance, installation need not be adjusted. Bearing installation should be carried out rotation test, first used for rotating shaft or bearing box, TIMKEN bearing if there is no abnormal, then no load, low speed operation by power, and then depending on the operation situation gradually improve the rotation speed and load, and detect noise, vibration and temperature rise, abnormal, should stop operation and check. We all know the principle of TIMKEN bearing, but when the bearing is removed and intended to be inherited for use, appropriate disassembly tools should be selected. When removing the interference fit ring, only the tension can be applied to the ring, and the disassembly force can not be transmitted through the movable body, otherwise the movable body and the raceway will be crushed.


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