Experienced Identification Method for Rolling Bearings
Introduction
Rolling bearings, also known as rolling contact bearings, are important parts of modern machinery and equipment. The performance depends on their quality. Therefore, the systems in need of the rolling bearings should be required to select the qualified bearings on the production. However, there are many uncertain factors in the actual application of the rolling bearing, such as overload, vibration, excessive tension, and cavitation, which often cause damage to the rolling bearing and result in failure. Therefore, it is important to conduct an experienced identification of the rolling bearing in order to prevent the loss caused by the failure.
Method Overview
The experienced identification of rolling bearing is a method of testing the use of rolling bearings. The purpose is to judge the performance and working condition of the rolling bearing through its appearance, sound, and special characteristics. In general, it can be divided into 5 steps.
Appearance identification
Firstly, we should carefully observe the shape of the bearing by using naked eyes. If the rolling bearing is used for a long time, there will be overheating discoloration, scars, and leakage marks on its surface. This is the sign of bearing life being close to the end. In addition, it needs to be paired with the accuracy of components to see if the deformation is too large.
Sound identification
The second step is to check the bearings normal sound. It is necessary to understand the bearing sound when it is in a good condition. If there is any abnormal sound, it is necessary to identify what kind of sound it is, where it is, how much it is, and how long it can last. This can be determined by its character. For instance, a squeaking sound is a sign of poor installation while a knocking sound may indicate a dirty bearing.
Vibration identification
In the third step, it is necessary to check the vibration of the bearing. A small vibration means a good working condition, while a larger vibration indicates the bearing needs to be replaced. The vibration of rolling bearing is generally 0.5mm amplitude, if larger than it, there may be a problem.
Heat inspection
The fourth step for experienced identification is to measure the temperature of the rolling bearing. If the bearing is working in a normal condition, its heat will be about 30 degrees over environment temperature. If the temperature is higher than this normal temperature, it means the bearing is working in an overload condition.
Other inspections
The last step is to check the dust removal, lubricating oil, and pressure of the bearing. In particular, dust removal is important because it can indicate the bearing cleanliness. In order to ensure the good performance, the bearing should be cleaned once a week and the lubricant must be replaced regularly.
Conclusion
To sum up, the experienced identification method is a useful testing approach to judge the working condition of rolling bearings. Careful observations should be made and clear tests should be conducted in a timely manner in order to avoid any potential damage caused by the bearing failure.
