**Detailed Analysis of the Failure Modes of Sliding Bearings**
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Many manufacturers have previously considered sliding bearings to be the main issue. However, modern motor factories have realized that the primary problem is often related to the insulation varnish. The real challenge arises when acidic substances from the varnish evaporate under certain temperature and humidity conditions, forming corrosive compounds that damage the sliding bearing.
To prevent this, it's essential to choose high-quality insulation varnish and ensure it is fully dried before installation. This step can significantly reduce the risk of corrosion and subsequent bearing failure.
One characteristic of paint-related rust is that it typically occurs in sealed motors. Initially, the motor may run smoothly after installation, but after being stored in a warehouse for some time, abnormal noise increases, and the sliding bearing shows severe signs of rust.
The lifespan of a sliding bearing depends heavily on the production process, installation, and operation. Every stage must be carefully managed. If proper attention is given at each step, the bearing can operate in optimal conditions, which helps extend its service life.
To ensure the sliding bearing remains in excellent working condition, regular maintenance and inspections are necessary. This proactive approach helps prevent unexpected failures, reduces downtime, and saves costs. Professional maintenance of sliding bearings requires a standardized work process, including monitoring operating conditions, using appropriate lubricants, scheduling disassembly, and checking for unusual noise or temperature changes.
Historically, the metallurgical quality of the bearing material was a key factor in early failures of rolling bearings. With advancements in metallurgy—such as vacuum degassing of bearing steel—the quality of raw materials has improved significantly. As a result, the proportion of material-related failures in sliding bearings has decreased. However, it remains one of the main factors affecting bearing failure. Choosing the right materials is still a critical element in analyzing and preventing sliding bearing failures.
When installing a sliding bearing onto the rotor, it’s easy to accidentally introduce iron filings generated during the dynamic balancing process into the bearing. Therefore, it's recommended to balance the sliding bearing before installation. Some manufacturers apply oil or grease to the housing to make the installation smoother, but this can be difficult to control. If too much oil or grease accumulates in the bearing chamber, it may be drawn into the bearing along the shaft during operation. The best practice is to avoid applying oil or grease unless absolutely necessary, and if not used, ensure there is no accumulation inside the bearing chamber.
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Detailed Analysis of the Failure Method of "Sliding Bearing"
Source: Bearing Network | Time: 2013-09-21
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Previous: Single-row angular contact ball bearing and double row angular contact ball bearing Next edit: Car abnormal sound – large mesh connecting rod bearing ring sweeping
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