Check the cause of the problem analysis bearing during operation

Bearing inspection and fault handling in operation the rumbling of check project have bearing in operation, vibration, temperature, lubrication condition and so on, details are as follows: a, the rolling bearing noise sound device of bearing operation on the size of the rumbling and quality inspection, bearing even with slight stripping damage, such as would an exception and irregular, and with the sound of the measuring device can distinguish. Two bearing vibration, the vibration of the bearing is sensitive to bearing damage, such as peeling, indentation, rust, crack and wear will be reflected in the bearing vibration measurement, therefore, through the use of special bearing vibration tester ( Frequency analyzer, etc. ) Can measure the size of the vibration, through frequency points cannot deduce the abnormal situation. Measured values of bearing or sensor installation position and different using conditions, thus requiring prior to each machine is analyzed by the measured value of the determined after judgment standard. Three, the temperature of the bearing temperature of bearing, generally have a bearing on the surface of the outdoor temperature can be predicted, if using the oil hole can directly measure temperature of bearing outer ring, is more appropriate. Usually, the temperature of the bearing with operation began to slowly rise, 1 - After 2 hours to reach steady state. Four, lubrication, A) Imported bearing lubrication effect of lubrication on the fatigue life of rolling bearing, friction and wear, temperature rise, vibration and so on have important influence, not normal lubrication, bearing cannot work. Analyze the failure reasons of bearing show that about 40% of the bearing damage is related to bad lubrication. （ 2) The comparison of grease lubrication and oil lubrication bearing lubrication method is roughly divided into two kinds of grease lubrication and oil lubrication. In order to give full play to the function of the bearing, it is important to use according to the way and purpose, the lubrication method. Table 4 - 2 shows the advantages and disadvantages of grease lubrication and oil lubrication. （ 3) Grease lubrication grease is composed of base oil, thickener and additive of lubricants. When the choice, should choose is very suitable for bearing conditions of use of embellish grease, because the trademark is different, also there will be a very big difference on performance, so when the choice, must pay attention to. （ 4) The choice according to the working temperature of the grease, grease main indicators should be drop point, oxidation stability and low temperature performance, drop point generally can be used to evaluate the high temperature performance, imported bearing working temperature should be lower than 10 - drop point 20℃。 The use of synthetic grease temperature should be lower than 20 - drop point 30℃。 Based on choosing grease, bearing load of heavy duty should choose small grease penetration.