NTN bearing fault analysis and repair methods

Imported bearing fault according to different brand and different technology parameters, the fault also vary, the following will tell everyone about the the NTN bearing the main technical failure analysis: 1, tile surface corrosion: spectrum analysis found that non-ferrous metal element concentration anomaly; Iron spectrum appeared a lot of non-ferrous metal components in sub-micron wear particles; Lubricating oil excess moisture, acid value exceeds bid. 2, shaft neck surface corrosion: spectrum analysis found that iron concentration is unusual, there are a lot of iron in iron spectrum of submicron particles, water or high acid value oil paint. 3, a shaft neck surface strain: iron spectrum have iron series cutting grinding grain or black oxide particles, metal surface heat tint. 4, tile back micro wear: spectrum analysis found that iron concentration is unusual, there are a lot of iron in iron spectrum wear submicron particles, lubricating oil moisture and acid value anomalies. 5, a bearing surface strain: iron spectrum found cutting abrasive, abrasive ingredients for non-ferrous metal. 6, tile surface spalling, finds many large size iron spectrum fatigue spalling alloy wear particles, the layered grits. 7, bearing tile burning: there are more iron spectrum by means of large size, alloy and black metal oxides. For as long as possible in good condition to maintain NTN bearing state, originally need arrangement for maintenance overhaul in order to prevent accident, to ensure the reliability of operation, improve the productivity and economy. To maintain the best conditions of mechanical operation of the corresponding operation standard, on a regular basis. Content includes monitor running status, supplement or replacement of lubricants, remove the check on a regular basis. ( 1) Running state overhaul of NTN bearing rotary for the maintenance of sound, vibration, temperature and lubricant condition on the properties of the maintenance, judgment, supplement or replacement period of lubricant. ( 2) NTN bearing maintenance in making preventive maintenance and replacement of mechanical, fully to take out the bearing observation, of rail surface conditions and presence of lesions, can use to confirm again. Turning the sound of overhaul project includes bearing in operation, vibration, temperature, the condition of the lubricant, etc. ( 1) NTN bearing of rotary sound clinical hydrophone is used to survey the size of the noise and sound quality. Even if a few bearing fatigue spalling in a state of anomalies and irregular, if proficiency is also possible to listen to. The typical abnormal sound like page (shown in 2) NTN bearing vibration using the bearing vibration generator, quantitative analysis of the vibration amplitude, frequency, etc. , thus infer bearing damage condition. But due to different bearing conditions of use and the determination of location, it is necessary to use mechanical measurements, decided to determine the benchmark. ( 3) NTN bearing temperature of bearing temperature after operation began to slowly rise, usually for a period of time after the saturated state. Constant temperature of the bearing due to mechanical heat capacity, heat quantity, speed and load. Bearing temperature before the saturation state and abnormal rises, consider the following pages is shown in reason, stop and take the necessary measures. ( 4) Lubrication investigation of grease and lubricating oil in use for to understand the status of the bearing operation is effective. Of course from the moisture content, sundry, iron powder and so on to judge the grease or oil leakage, discoloration, and degradation. Believe that there is a lubricant leakage and iron powder, metal powder mixed with situations such as a foreign body, regular of leakage, bearing temperature and vibration and other quantitative observation, if think there are abnormal, early maintenance.