The most common failure in use as a sliding bearing, the main bearing and connecting rod watts, early wear of wear-resistant alloy layer peeling or burning, and bearings. Diesel engine after a short operation, the bearing surface that rapidly destroyed or badly worn, the reason is not so much the bush itself mainly caused due to the use of conditions or with the bad parts or technical state. An investigation materials showed that 44.9% of the Bearing Damage caused by impurities, 13.4% adverse assembly, 12.7% poor concentricity, 10.8% poor lubrication, 9.5% overload, and the rest are other factors such as corrosion.
The diesel engine in the process of starting, stopping, bearing always in the critical state of lubrication can film intermittent direct contact with friction surface. Even if the diesel engine during normal operation, since the load instability and other factors, the journal and the bearing is also difficult to maintain a uniform and uninterrupted liquid lubrication. In addition, the new diesel engine in the assembly has not been completely cleared of sand and iron filings into dust dirt during operation, but also accelerate the wear and tear caused Lava bush-burning main reason.
The peeling of the bearing is damaged due to fatigue. Change over time because of the size and direction of the bearing load applied, when the load is unstable, the surface of the bearing friction can not maintain a uniform continuous film, and the pressure of the oil film are also pulsation type changes. When the minimum film thickness, within the local region of the bearing surface to produce high temperature, which greatly reduces the fatigue strength of the alloy layer. Poor, bearing its own manufacturing and assembly, but also led to the direct cause of the alloy layer peeling off.
In addition to abrasion and spalling, and corrosion of the sliding bearing is also noteworthy, which depends primarily on the quality of oil, temperature, pressure, and bearing load. High load bearing parts most prone to corrosion, the lubricant deterioration at high temperatures generated organic acids and sulfide bearing corrosion is caused by the direct cause.
Bearing burning, usually called "bush-burning" The main reason is the gap is too small, poor lubrication and use operating.


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