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INA Bearing Failure Inspection

by:JNSN     2022-03-16
During the use of INA bearings, due to their own quality and external conditions, their carrying capacity, rotation accuracy and wear resistance will change. When the performance indicators of INA bearings are lower than the requirements for use and cannot work normally, INA bearings will occur. In case of failure or even failure, once the INA bearing fails and other unexpected situations, the machine and equipment will stop, and various abnormal phenomena such as loss of function will occur. Therefore, it is necessary to find out the cause in a short period of time and take corresponding measures. The INA bearing can maintain its proper performance under good conditions and be used for a long time. The INA bearing must be inspected and maintained. Inspection and maintenance are very important to prevent failures. During operation, it is necessary to focus on checking the rolling sound, Vibration, temperature and lubricant. 1. Rolling sound of INA bearing The noise of INA bearing is generated by the INA bearing itself, that is, the inherent noise of the INA bearing; the other is the noise generated after the INA bearing is installed, which is different from the INA bearing itself. Some problems can be analyzed by listening to the sound. a) Inherent noise: raceway sound 'Various INA bearings and rolling friction sounds (cylindrical roller INA bearings) are inherent sounds of rolling INA bearings.' The raceway sound is It is a continuous and smooth sound produced by the elastic characteristics of the rolling elements in contact with the raceway. When the INA bearing rotates, the rolling elements roll on the raceway and make a continuous and smooth sound; abnormal rolling friction sound can produce creaking, creaking, etc. Uncomfortable metal friction abnormal sound, such a sound will not be produced when the lubrication is good. Therefore, it is not a problem in general, and it is only necessary to pay attention when the noise increases. b) Noise related to the manufacture of INA bearings: including cage noise here And vibrato, cage noise mainly occurs in ball INA bearings and tapered roller INA bearings, when the INA bearing rotates due to the vibration of the cage and the collision between the cage and the rolling elements, there will be a sound. This sound is periodic. Tremolo (Various INA bearings) are sound with a certain frequency, which is caused by vibration caused by large waviness on the raceway surface. c) Noise caused by improper use: it exists for all kinds of INA bearings. When INA If the surface of the bearing raceway or rolling element is bumped, cratered, or corroded, noise and vibration with a certain period will be generated. When the INA bearing has dust intrusion during operation, it will generate dirt noise. This kind of noise is abnormal Periodic, also accompanied by vibration, the sound size is not fixed, and sometimes there is no. 2. The vibration of INA bearing The vibration of INA bearing has obvious influence on the failure of INA bearing. For example: peeling, indentation, corrosion, crack, Wear, etc. will be reflected in the INA bearing vibration detection, so by using a special INA bearing vibration measurement device (frequency analyzer and vibration meter, etc.), the magnitude of the vibration can be measured, and the specific situation of abnormal vibration can be inferred through the frequency distribution. The measured values u200bu200bare different due to the use conditions of the INA bearing or the installation position of the sensor, etc. Therefore, it is necessary to analyze and compare the measured values u200bu200bof each machine in advance to determine the judgment standard. 3. The temperature of the INA bearing usually increases slowly with the start of operation, and reaches a steady state after 1 to 2 hours. The normal temperature of the INA bearing varies with the heat capacity, heat dissipation, speed and load of the machine. If lubricated, installed If it is not suitable, the temperature of the INA bearing will rise sharply, and abnormally high temperature will occur. At this time, the machine must be shut down and necessary preventive measures must be taken. 4. Lubricant lubrication has an impact on the fatigue life and friction, wear, temperature rise, vibration, etc. of rolling INA bearings. Important influence, without normal lubrication, the INA bearing cannot work. Analysis of the damage causes of the INA bearing shows that about 40% of the damage of the INA needle roller bearing is related to poor lubrication. Therefore, the good lubrication of the INA bearing is to reduce the friction and friction of the INA bearing. Effective measures for wear and tear. In addition, the lubrication of INA bearings also plays a role in heat dissipation, rust prevention, sealing, mitigation of impact, etc. To ensure that the lubricant cannot expire and fail, the selection must be correct. The lubricating oil of the INA bearing of the harvester There are two kinds of lubrication and grease lubrication. The oil lubrication of the large model gear box is GL-5 80W90 gear oil; the grease lubrication is generally used with lithium molybdenum disulfide grease, and the lower part of the stepless transmission of the torque increaser must be lubricated with Mobil XHP222 or more. Good grease lubrication.
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