It is increasingly important to check the condition of the running machine and prepare a thorough inspection plan. The imported bearing is the focus of attention. Because it is the most important rotating part of all machines, condition monitoring is an important part of preventive maintenance. Early detection of bearing damage prevented equipment downtime during unplanned maintenance due to bearing damage.
In particular, bearings in critical machines or harsh environments should be inspected frequently. There are quite a few systems and instruments on the market to monitor bearings. Most of these instruments are based on vibration measurements.
However, not all machines are equipped with this advanced instrument, in which case the operator or maintenance engineer of the machine must be highly alert to the [fault signal] of the bearing, such as noise, temperature and vibration. [Listening], [Touch], and [Observation] are three important factors. The following comments can be used as a reference.
listen:
The use of hearing to identify irregular movements is a very common method, such as the use of an electronic stethoscope to detect abnormal noise of a part is used by experienced operators. If the bearing is in good working condition, it will make a low humming sound. If it is a sharp hum, arpeggio and other irregular sounds, {TodayHot} usually indicates that the bearing is in poor working condition.
Sharp squeaking noise may be caused by improper lubrication. Improper bearing clearance can also cause metallic sound. The dents on the outer ring of the bearing cause vibration and cause a smooth and crisp sound. If the knocking damage caused by the installation is also caused by noise, the noise will vary with the speed of the bearing. If there is intermittent noise, it means that the rolling parts may be damaged. This sound occurs when the damaged surface is crushed. If there are pollutants in the bearing, it will often cause a squeak. Serious bearing damage will cause irregularities and Huge noise.
Bearing damage can be detected by hearing, but usually the bearing must be replaced immediately. Therefore, a better method, for example, uses an electronic condition monitoring instrument to pre-rupture the operation of the bearing.
Compared to the old method (using a wooden stick or screwdriver to the bearing housing and the other end to the ear), advanced equipment can be used to accurately predict the bearing condition.