One, bearing the maintenance of technical problems:


The bearing maintenance technology of the two complex issues: when oil. How much oil. If too little oil, the bearings will be early retirement; the oil too much, the bearing will be in trouble or long-term damage to the power coil and reel.


Two, bearing maintenance technology:


Decide when lubrication as well as when to stop oiling is very simple: to develop a baseline to develop the monitor when the observation schedule and oiling.


1.To develop a baseline


Bearing base line reflected in the normal operation, no video error, the decibel intensity sufficient lubrication conditions.
To establish the baseline of three ways:


1), Comparative Law: If there is the same type of bearings, these bearings can put them together. Using the same test method or from the same angle to look at each bearing. Analysis of the intensity in decibels and sound quality. If there is no essential difference (less than 8 dB), we can set it to each one bearing the basis of decibel intensity.
2), add the oil to set the baseline: when the lubricant is added, listening to the sound intensity and sound intensity decreased and then increased. At this time, do not add too much oil, and set it as the baseline.
3), the historical record: To observe the bearing dB intensity was recorded every day, and then record the results of comparison of 30 days. If the decibel intensity change little or no change (less than 8 dB), we can put this set to the baseline, and for later comparison value of the observed results.


2, set up observation schedules


Such as gross domestic product, environmental results, the operating results related to the device key is to choose and set up the assessment of mechanical systems. When the basis of observed line after the enactment of the month detection time is necessary. To lubricate high-decibel bearings should be the frequency of detection is more frequent, so you can observe its possible changes. If a bearing is to be destroyed by the state, then the oil can only temporarily mask the error. However, the db strength will soon be increased to show the error exists. In some cases, this phenomenon within a few minutes will be apparent, while others take a few days.


3, detected lubrication


If a bearing dB more than the baseline 8 db, we believe that the bearings need lubrication. When we realized that the bearings need lubrication, then know when to stop oiling will prevent over-lubrication. Follow these three steps to complete:
1), the guidance of the bearing manufacturer's calculated on the basis of usage, and then injected into the lubricating oil, not too much. This step is very subjective, and has nothing to do with the ultrasound, and this step is never failure.
2), when injected into the lubricating oil lubrication technician application of ultrasonic detection equipment bearings. Slowly oiling until the decibel intensity dropped to baseline.
3) If there is no baseline as a guide, the amount of the lubricant should be stopped when the sound lower and then rise. At this time, the technician should cease to continue to use lubricants.


4, the ultrasonic bearing inspection


Ultrasonic inspection or monitoring find that bearing damage early (the beginning) the most reliable way. When the temperature or low frequency vibration intensity strengthen, ultrasonic warning will be the first ring. Bearing when the bearing due to the use of excessive damage early, the lack of excess lubricating oil or lubricating oil, the use of such inspections is very useful.


5 found that the failure signal


Like a metal ball bearing track, such as roller or ball bearings, excessive use occurs slightly deformed. This situation will produce irregular surface, resulting in the dissemination of ultrasound to increase. The amplitude of the change from the initial reading that one to two conditions: early failures or lack of lubricant and early bearing failure. If the ultrasound is more than eight db baseline, accompanied by the continued impact of noise, the noise that the lubricant failed bearing surface (dry). If the ultrasound readings more than expected readings, 12 db is reached, there will be a collapse of the noise, this noise can be assumed to have entered for the bearing failure mode


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