Bearing damage is the main cause
The main cause of damage to the bearings due to cleanliness. The work of preventing damage due to poor cleanliness is multifaceted: ensuring the cleanliness of the parts during engine assembly is only one aspect, and on the other hand, the engine is in use. Operators and maintenance personnel must use timely and timely maintenance inspections, especially for engines that work in dusty and chemical raw materials for a long time. Measures must be taken to prevent the erosion of dust and chemical gases and to ensure the use of engines. life. The alloy layer on the surface of the main bearing bush and connecting rod in the engine is the softest, with the largest load and the most easy damage. Therefore, the surface damage of the main bearing bush and the connecting rod is analyzed below to avoid the recurrence of the fault after repair.
"Cross-fixed" fag bearing configuration
"Cross-fixed" refers to a bearing arrangement in which each bearing is unidirectionally positioned in the direction and in the opposite direction. This combination is mainly used for short axes. All radial bearings that can withstand at least one axial load are suitable, including deep groove and angular contact ball bearings, tapered roller bearings and NJ cylindrical roller bearings. When using angular contact ball bearings or tapered roller bearings, In some cases, a preload must be applied.
Extending the life of a bearing lubricant An important step in extending the life of a bearing lubricant is to implement a comprehensive lubricant analysis program that compares the results of the analysis with previous analysis reports to understand the trends in key wear characteristics. Such an analysis program can help identify problems with lubricant contamination, lubricant degradation, abnormal machine wear, and sampling operations. In addition, the analysis plan also changed the replacement of lubricants from on-time replacement to quality replacement, so as to avoid replacing the lubricant with good condition.
Installing the fag bearing process
For the installation of bearings with large interference, before the hot assembly, put the bearing or the ferrule of the separable bearing into the fuel tank and heat it evenly at 80-100 °C, then remove it from the oil and load it on the shaft as soon as possible to prevent cooling. The end face of the ring and the shoulder are not tightly attached, and the bearing can be axially tightened after cooling. When the outer ring of the bearing is tightly matched with the bearing seat made of light metal, the hot mounting method of the heated bearing seat can avoid the abrasion of the mating surface.