Combination of TIMKEN bearing failure of detection fault analysis

Use factors mainly refers to install, use, maintenance, maintenance, repair and so on meets the technical requirements. Installation condition is one of the primary factor of use factor, bearing is often caused by improper installation of a complete set of TIMKEN bearing stress changes between various parts, bearing in the abnormal state run and early failure. According to the combination of bearing installation, use, maintenance, maintenance of technical requirements, the operation of the bearing on the load, speed, temperature, vibration, noise and lubrication condition monitoring and inspection, found that abnormal immediately to find the reason, adjustment, so that it is back to normal. In addition, analyze the grease and the surrounding medium, the atmosphere quality inspection is also very important. The TIMKEN bearing condition monitoring and fault diagnosis of vibration analysis is practical method. Must pay attention to the signal acquisition is accurate, true and practical in the need to pay attention to choose the location of the measuring point and sampling method. To be truthful and accurate reflect the combination of bearing vibration state. So to where the nearest bearing arrangement of measuring points, the motor fan cover after generally have free end, the selecting the fan cover screw has good monitoring effect. In addition must pay attention to many times of the vibration signal acquisition and analysis, comprehensive to match. Ability to get accurate conclusion. Bearing on its use in the process of showing a strong regularity, temporary production condition monitoring. And the repeatability is very good. Normal high quality bearing, at the beginning of the use of vibration and noise are relatively small, but there are some scattered of spectrum amplitude is small, may be due to some defects in the process of manufacturing, such as appearance burr. Maintain a certain level of vibration and noise, movement after a period of time. Spectrum is very single, only one or two times the frequency. Rarely appear more than three times the power frequency spectrum, composite bearing condition is very stable, steady working period. TIMKEN bearing vibration and noise began to increase, continue to run after the late into use. Sometimes a different tone, but the change of vibration increase is relatively slow, at this point, the bearing kurtosis value began suddenly reaches a certain value. Think, this time the bearing is expressed as the early failure. Bearing raceway and roller contact surface appear uneven pits, TIMKEN bearings produce plastic deformation. The reason is bearing under static load or shock loading, local stress exceeds the yield limit of material on the surface of the work, this kind of situation usually happened in the low-speed rotation of the bearing. Retainers metal adhesion on the rolling body possible reason is that roller was stuck in a cage or insufficient lubrication. Cause crack of the bearing race may be combined bearing fit tight, foreign or loose inner ring, outer spherical bearing TIMKEN bearing deformation, inclusive of installation of bearing surface processing etc.