Separation of the bus alloy in the big end bearing of the reciprocating compressor rod

1. Material issues with the large-topped tiles； 2. Issues with the installation of large tiles. When assembling the head gasket, it is necessary to check both the contact area between the head gasket and the rod pin, as well as the contact area between the back surface of the head gasket and the surface where it fits into its seat ； 3. There are problems with the lubricating oil and the oil circuits ； 4. Issues with the clearance between the large-head tile and the connecting rod ； 5. Issues such as overload can cause the babbitt in the large end of the connecting rod to come loose.

There are issues with lubrication and cooling; it could be due to poor quality oil or an incorrect oil type. There may also be problems with the oil circuits, such as blockages. The oil pump in the lubrication system might be faulty and unable to circulate the lubricating oil. Additionally, there could be problems with the lubricating oil cooling system, which fails to perform its cooling function; as a result, the hot oil cannot be cooled, and this can lead to the sintering of the bearing materials； Assembly clearance, clearance and contact area between the big end bearing and the crank pin (with red lead applied), pre-tightening force of the big end bearing ； If the concentricity between the crank pin and the big end bearing is too poor, it will lead to uneven wear; similarly, if the crank pin is not perpendicular to the connecting rod, either lack of perpendicularity or misalignment will result in uneven wear.

If the lubricant issues can be ruled out, and if the problems with the bearing shells can be eliminated, it’s likely that there is an issue with the crankshaft’s camber or that the clearance between the bearing shells is too small, reaching the upper limit value