Failure analysis of plain bearings

In the cement plant machinery and equipment in the sliding bearing mainly have copper tile, pasteurized alloy tile, phenolic resin tile, sliding bearing main failure forms are heat, abnormal wear, burning tile. Sliding bearing failure form and scraping tile way and the corresponding lubrication mechanism has a close relationship.

Generally, the sliding bearing tiles in cement plants are shaved according to the wedge-shaped lubrication mechanism. Possible causes of heat roughly new tile replacement has not been completely break-in or run for some time due to the bearing bearing load suddenly changed, after a short period of time after the adjustment of the problem disappears, in the discovery of tile overheating should be closely monitor the tracking and do not rush to other processing operations.

Bearing abnormal wear will lead to a variety of mechanical failures, so abnormal wear to attract a high degree of attention, the occurrence of abnormal wear and tear is no more than bearing sliding bearing tile load is seriously exceeded or sliding bearing tile mixed into the hard particles, burning tile is in the absence of lubrication, sliding bearing tile dry wear caused by the bearing scrapped damage, once the occurrence of the burning tile in addition to the replacement or re-scraping tile has no other repair methods.

Cement machinery and equipment in the bearing and fault prevention and treatment methods, bearing lubrication, whether rolling bearings or plain bearings, lubrication is the normal operation of the bearing and extend the service life of the key links. Bearings in the installation and use of the process must choose high-performance lubricants uninterrupted lubrication of bearings, should be brought to attention is due to the special nature of the cement production chain, the environment will often have some hard foreign objects, in the lubrication operation, must be cleaned up the surrounding environment, to prevent the lubricant mixed with some hard foreign objects into the bearing, so as to the operation of the bearings to bring about abnormal wear and tear. The bearings belong to the wear and tear of machinery and equipment.

Bearings in mechanical equipment belongs to the wear parts, have its corresponding service life, in the bearing installation should be well documented, when the bearing into the predetermined period of use should be intensive testing, ready for replacement. In the usual use of the process to develop a set of perfect monitoring system, through the bearing temperature, color, depth of friction groove and other detailed data to timely discover the existence of hidden problems in the bearings, will be excluded at the primary stage of hidden problems. Choose the type of bearing that matches the strength of the demand, and choose those bearings produced by qualified big brand manufacturers to ensure that their design parameters are reasonable, and avoid the design defects of the selected bearings that may affect the normal service life of the bearings.

The bearings in the mechanical equipment in the cement plant are subject to more serious environmental corrosion than the bearings in other environments, which requires us to pay attention to minimize the corrosion of the bearings in the maintenance process of the bearings, and place the bearings in a closed environment as far as possible, to prevent the inflow of material in the production process. After the discovery of already corroded bearings, the liquid in the bearings should be excluded immediately to increase the airtightness of the bearings.

In the rolling bearing installation and replacement process, must strictly implement the installation of the operating procedures, to ensure that the balance of the bearing installation, as well as the correctness of the force point and the uniformity of the force. According to the importance of the first to correct the position of the bearing in the center, while ensuring that the bearing jacket in the installation process of the bearing jacket tapping the inner surface of the bearing jacket, and the various force points balanced advancement, and then the angular contact bearing mounting direction to maintain consistency.