The piston connecting rod group is the transmission part of the engine. It transmits the pressure generated by combustion gas to the crankshaft, which rotates and outputs power. Piston connecting rod group is mainly composed of piston, piston ring, piston pin and connecting rod.
Diesel engine connecting rod crankshaft journal and connecting rod between the big end of the installation of sliding bearings, because its shape like tiles, so called connecting rod bearing. The gap between the connecting rod crankshaft journal and the connecting rod bearing is fit, so that when the crankshaft rotates, the oil can form an oil film on the friction surface, thus reducing the friction and wear of the crankshaft journal.
The common damage of the connecting rod bearing of diesel engine is mainly the damage of the wear resistant alloy layer on the bearing bush. The main damage forms are: early wear and burning, corrosion, abrasion, fatigue crack and peeling, etc. In order to take effective preventive measures to reduce the occurrence of connecting rod bearing bush damage, the following analysis is made on the causes of the damage of connecting rod bearing bush.
The damage of connecting rod of diesel engine is seldom seen under normal operation. The shape of the diesel engine connecting rod body is mostly "work" shape, which can meet the strength requirements under normal circumstances.