Different Diagnosis Methods Of Rolling Bearing Failure

As an important part of mechanical equipment, rolling bearings will directly affect the normal operation of mechanical equipment if there is a fault in the process of use.The bearing failure is one of the common problems. If the mechanical bearing initial failure occurs, we should judge it to find it as soon as possible and carry out the corresponding treatment as soon as possible, so as to prevent the normal process of mechanical equipment work.BMB Bearings brings you a way to determine the cause of bearing failure.

1. Analysis and diagnosis of abnormal rotating sound

First, the bearing makes a uniform and continuous "hissing" sound, which is generally shown as the lack of fat in the bearing and should be supplemented.Second, the bearing in the continuous "clatter" sound issued even periodic "ho lo" sound, this sound is caused by the rolling body and the inner and outer ring raceway scars, grooves, rust spots.The period of sound is proportional to the speed of the bearing.The bearing shall be replaced.Third, the bearing makes an irregular and uneven "scratching" sound, which is caused by the impurities such as iron filings and sand particles falling into the bearing.The sound intensity is small and has no connection with the number of revolutions.Bearings should be cleaned, refatted or oil changed.

2. Vibration signal analysis and diagnosis

Bearing vibration is very sensitive to bearing damage, such as peeling, indentation, rust, crack, wear and so on will be reflected in the measurement of bearing and vibration.Therefore, the size of vibration can be measured by using a special bearing vibration measuring device (frequency analyzer, etc.), and the specific situation of abnormal can be inferred through the frequency distribution.The measured values are different due to the use conditions of bearings or the installation position of sensors, etc., so it is necessary to analyze and compare the measured values of each machine in advance to determine the judgment standard.

3. Simple diagnosis of rolling bearing faults

In the process of simple diagnosis of rolling bearings by vibration, it is usually necessary to compare the measured vibration value with a predetermined standard, and judge whether the bearing has a fault according to whether the measured vibration value exceeds the limit given by the standard, so as to determine whether further precision diagnosis is needed.

4. Precision diagnosis of rolling bearing faults

The vibration frequency components of rolling bearings are very rich, including both low frequency components and high frequency components, and each specific fault should have a specific frequency component.The task of precision diagnosis is to isolate specific frequency components by appropriate signal processing methods to indicate the presence of a specific fault.

5.Bearing temperature analysis and diagnosis

Usually, the temperature of the bearing begins to rise slowly with the operation of the bearing and reaches a stable state after 1-2 hours.The normal temperature of the bearing is different due to the heat capacity, heat dissipation, speed and load of the machine.If lubrication and installation are not appropriate, the bearing temperature will rise rapidly and there will be abnormal high temperature. At this time, the operation must be stopped and necessary preventive measures should be taken.

BMB Bearings is the complete one-stop supplier of OEMs and wholesalers purchasing high-precision, miniature ball bearings, industrial ball bearing related products, as well as related professional services, including world-class engineering and design.BMB bearing reminds you that by applying the above test means to track and test the running state of the key equipment bearing parts, the hidden trouble of the equipment bearing parts can be effectively diagnosed, so that prevention can be made in advance to ensure the normal use of the equipment.