The common faults of connecting rods in
diesel generator and internal combustion engines include the following:
1. Crack scrapping: The connecting rod is subjected to complex forces during operation, and may crack after long-term use, leading to the scrapping of the connecting rod.
2. Lateral bending: Lateral bending of the connecting rod can cause the centerline of the connecting rod's large and small head holes to be non parallel, resulting in piston deflection, increased friction, power loss, intensified wear of the piston and piston rings, increased exhaust gas from the crankcase, oil leakage, and other problems.
3. Twist: Twisting the connecting rod can cause the connecting rod and piston pin, as well as the piston pin and piston, to be trapped and unable to rotate properly. In severe cases, it can result in strong piston knocking on the cylinder.
4. Bending in the plane direction: The bending of the connecting rod in the plane direction will affect the strength of the connecting rod, causing abnormal coordination between the piston group and the cylinder, resulting in abnormal longitudinal wear.
5. Misalignment and taper of connecting rod end holes: Connecting rod end holes of different sizes may experience misalignment and taper, which can affect the normal operation of the connecting rod.
6. Damage to connecting rod bolts and nuts: Connecting rod bolts and nuts may be damaged during use, affecting the fixation and stability of the connecting rod.
Cause of malfunction and preventive measures:
Overload and explosion: One of the main causes of connecting rod bending and twisting is internal combustion engine overload and explosion, which can lead to a decrease in connecting rod strength and abnormal fit.
Inspection and calibration: During repair, it is necessary to carefully and accurately inspect and calibrate the bending and twisting of the connecting rod, and a connecting rod calibrator can be used for inspection and calibration.
