INA roller bearing in operation using some knowledge for inspection notice

INA bearings after installation, in order to check whether installed correctly, check for running. Small mechanical can rotate with the hand, to confirm whether to rotate smoothly. Check project has caused by foreign bodies, scars, creasing seized up, due to bad installation, installation of seat processing bad moment is not stable, because the clearance is too small, installation error, seal friction caused by the torque is too big, and so on. If there is no abnormal can start power operation. Large machinery from manual rotation, so after no-load start immediately cut off the power, machine idle, check whether there is presence of vibration, noise, rotating parts contact, etc. , confirmed after no abnormalities, into power operation. Dynamic operation, from the beginning of the no-load speed, slowly up to the rated operating conditions. Test run to check the items, whether there is abnormal sound, the change of wheel bearing temperature, lubricant leakage or discoloration, and so on. If discovery is unusual, should immediately stop, check machine, when it is necessary to remove the bearing inspection. 1. Bearing assembly method because of INA bearings are precision products, such as improper assembly channel, it is easy to damage koyo bearings, bearing damage. In the bearing assembly should have a special mould, can't play when axial pressure force is only a small circle, circle, only according to the stress cycle. Pneumatic or hydraulic assembly requirements, the use of pressure to the mold under the outside installed in a horizontal state, if inclined to bearing channel will lead to the damage caused by the power, and make the roller bearing produces sound. 2. The removal of bearing and install also carefully. Careful not to damage the INA bearing and various parts, especially interference fit the bearing down, and the operation is difficult. So, in the design stage to consider in advance to facilitate disassembly, designed and manufactured according to need remove the tools is also very important. When disassembling, according to the drawings the disassembly method, sequence, investigation of bearing with conditions, to ensure foolproof disassembly operations. 3. Imported bearing materials allows foreign hard particles in the lubricant pliers and prevent scratches or ( And) The ability of abrasive wear. For metallic materials with low hardness and elastic modulus, clamp in the sex is good, and the nonmetal material is not necessarily, carbon graphite, for example, low elastic modulus, but the clamp in the sex is bad. Roller bearing usually use soft material and hard material forming friction, usually made from soft material bearing shell. 4. Check INA bearings vibration in the working situation from peeling, indentation, rust, crack and wear will be in Sweden spherical roller bearing vibration measuring, switch bearing vibration roller bearing damage is very sensitive, therefore, by adopting special bearing vibration measuring device ( Frequency analyzer, etc. ) Can measure the size of the vibration, through frequency points cannot deduce the abnormal situation. Bearing temperature, average according to the external temperature of the bearing. But using the oil hole directly measuring the temperature of the bearing outer ring more accurate. The bearing temperature, starting operation gradually increases, usually 1 ~ 2 hours after the temperature stability. If the roller bearing installation, the temperature will rise sharply, abnormal high temperature. The reason such as lubricant, bearing clearance is too small, too much bad installation, excessive friction sealing device, etc. High-speed rotation, INA bearing structure, selection of lubrication method error is also the reason. Bearing the examination such as the rotation of the sound with a stethoscope, a strong metal noise, such as vision, irregular note that exception. Its reason has poor lubrication, shaft or precision bearing, bearing damage, foreign body intrusion, etc.