How to NSK cylindrical roller bearing used by sound judgment problem

Check the status of the operation of the machine and prepare thoroughly check program has been more and more important, and the NSK bearings as the focus, because it is the most important of all the machines rotating parts, cylindrical roller bearing condition monitoring is an important part of the preventive maintenance, early detection of NSK bearing damage in order to avoid because of the bearing damage caused by the unscheduled maintenance equipment during outage. Cylindrical roller bearing below I like to introduce you to listen to this method. Cylindrical roller bearing using the hearing to identify irregular operation is a very common method of examples with the aid of electronic stethoscope to check that a certain parts of abnormal noise was experienced operator use. If the bearing is in good operation condition will be low purring sound, if a sharp hissing sound cylindrical roller bearings, make sound, usually said bearings and other irregular in poor operation condition. 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, a shaft neck surface strain: iron spectrum have iron series cutting grinding grain or black oxide particles, metal surface heat tint. 3, 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. 4, surface strain: iron spectrum found cutting abrasive, abrasive ingredients for non-ferrous metal. 5, 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. In liquid lubrication condition, the sliding surface is lubricating oil without direct contact, also can greatly reduce the friction loss and wear of surface oil film also has a certain vibration absorbing ability high-pitched squeaky noise may be caused by improper lubrication. Improper NSK bearing clearance can cause metal sound. Cylindrical roller bearing outer ring grooves on the tracks can cause vibration, and lead to sound like the coo of a smooth, if because of the installation caused by the striking scar also can produce noise, the noise will NSK bearings with the rotational speed of high and low. If there is intermittent noise, said rolling parts may be damaged, cylindrical roller bearing this voice is happens when the damaged surface is rolled out, bearing inner if pollutants often causes hissing sound, serious damage of bearing can produce irregular and big noise. Bearing damage can be listening to check by sleep, but usually at this time has come to NSK bearings must be replaced immediately. Therefore, good methods such as using such as electronic condition monitoring instrument, the workings of the cylindrical roller bearing diagnostics bearing in advance.