Metal,main

The main function of excavator engine crankshaft bearings is to protect the shaft neck and bearing hole, reduce friction and wear, and convert the gas force transmitted by the piston connecting rod group into torque for external output, driving the engine’s valve train and other auxiliary devices. The crankshaft bearings include connecting rod bearings and main bearings, which are used to protect the journal and bearing holes, reduce friction and wear. Convert the gas force transmitted from the piston connecting rod group into torque for external output, and also use it to drive the engine’s valve train and various other auxiliary devices.
The structure of crankshaft bearings is composed of upper and lower bearing shells, each of which is made up of a steel back and an anti friction alloy layer or a steel back, anti friction alloy layer, and a soft coating layer. This structure helps to disperse pressure, reduce wear, and ensure the stability and durability of bearings during operation.
The requirements for the use of crankshaft bearings include withstanding alternating loads and high-speed friction, therefore the bearing material must have sufficient fatigue resistance, low friction, wear resistance, and corrosion resistance. In addition, special attention should be paid to the installation and disassembly of bearings to avoid damage to parts such as retainers, sealing rings, dust covers, etc.