As sliding bearing spindle tiles and connecting rod tile, in use the most common fault is resistant alloy layer stripping or caustic, and bearing early wear.

Diesel engine after short-term operation , axle bush surface that is destroying or severe wear, its reason most bearing is not in itself, but is mainly due to the conditions of use or matching parts or bad condition of technology and cause.

A survey materials show, axle bush the cause of damage is caused by impurity 44.9%, 13.4% are assembly bad, 12.7% is the poor concentricity, 10.8% are bad lubrication, 9.5% are overload, the rest is corrosion and other factors. Diesel engine in starting, parking process, bearing often is in critical lubrication condition, can make the oil film discontinuous, direct contact friction surface. Even if the diesel engine in normal operation, as the load unstable factors, shaft neck and bearing also hard to keep uniform and continuous liquid lubrication.

 
In addition, the new diesel engines in assembling failed to completely remove sand and scrap iron, can be in during the running into the dust contamination, is also accelerate to wear, the cause and the main cause of the tile burning watts. Bearing is mainly due to fatigue spalling damage. Because the load bearing the size and direction changes over time, when the load is not stable, the bearing surface friction between the uniform couldn't keep continuous oil film, and the pressure of the oil film in pulsing to change. In the least oil film thickness, carrying the local area within the high temperature, and greatly reduce the resistance of the alloy coatings fatigue strength. In addition, bearing manufacturing and assembly itself bad, is the leading cause of the direct reason of spalling alloy.



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