1. Oil problem: Insufficient oil or the presence of hard abrasives in the oil, as well as the deterioration of the oil containing acidic substances, can all lead to journal wear. Poor cleanliness of engine oil and excessive impurities can accelerate the wear of bearings and shafts.
2. Poor lubrication: Insufficient lubricating oil quantity, poor oil quality, low oil pressure, etc. can all lead to poor lubrication, resulting in excessive or insufficient clearance between the journal and the bearing shell, leading to dry friction and early wear.
3. Overload operation: Long term overload operation or working under overheating conditions of diesel engines can accelerate spindle wear.
4. Impurity influence: When the crankshaft rotates, mechanical impurities in the oil will be biased towards the oil hole side, becoming abrasives, causing uneven wear of the shaft neck and producing taper.
5. Design and manufacturing defects: Poor surface roughness of the journal, presence of indentations, scratches, corrosion and other defects can lead to stress concentration and easy cracking.
6. Improper use: Bending, twisting, and cylinder liner deviation of the connecting rod can cause uneven force distribution on the crankshaft and uneven wear of the shaft neck.
Preventive measures:
Regularly check and replace engine oil to ensure its cleanliness and quality.
Maintain appropriate oil level and pressure to avoid poor lubrication.
To avoid long-term overload operation of diesel engines, regularly inspect and maintain them.
Regularly clean impurities in the engine oil to ensure its purity.
