Matters needing attention in the work of the bearing: listening

Source: China Bearing Network Time: 2013-03-22

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It is increasingly important to look at the situation of the machine at work and prepare a complete inspection plan; in the meantime, the bearing is the focus; because it is the most important rotating part of all machines; situation monitoring is an important part of preventing protection; early The detection of bearing damage to prevent the non-schema protection time of the device due to bearing damage is stopped.
Especially in important machines or in harsh environments, the bearings should be viewed frequently; the market has presented quite a number of systems and instruments; used to monitor bearings; most of these instruments are based on the measurement of oscillations.
However, not all machines are equipped with this leading instrument; in this case, it is necessary for the operator or protection engineer of the machine to be highly vigilant about the [error signal] of the bearing; for example, noise, temperature and oscillation. [Listening], [Contact] and [Investigation] are three important elements; the following views can be used as your reference.
listen:
It is a very general method to use auditory to identify irregular work; for example, if an electronic stethoscope is used to detect abnormal noise of a part, it is experienced by the operator. If the bearing is in outstanding work, it will be declared low. The humming sound; if a sharp voice, voice, and other irregular sounds are announced, {TodayHot} generally indicates that the bearing is in poor working condition.
Sharp å±å± noise can be caused by improper smoothness. Inappropriate bearing clearances can also form metal sounds. The dents on the outer ring of the bearing can cause oscillations; and form a smooth and loud sound; The resulting knocking flaw will also cause noise; this noise will be different from the bump of the bearing speed. If there is intermittent noise, it means that the rolling part can be damaged; this sound is the attack when the damaged surface is pressed Expired; if there are pollutants in the bearing, it often causes a voice; severe bearing damage will result in irregular and grand noise.
Bearing damage can of course be detected by hearing; however, it is now common that the bearing has to be replaced immediately. Therefore, better methods such as the use of electronic condition monitoring equipment; pre-rupture bearing work.
Compared with the old method (use a wooden stick or screwdriver to the bearing housing; the other end is attached to the ear); using the leading instrument can more accurately predict the bearing situation.

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