The shaft diameter prevents direct adhesion and boundary lubrication when in direct contact with the bearing pads. The material factors that affect the frictional compatibility of the friction pair are:
(1) The degree of difficulty in forming an alloy by metallurgical materials.
(2) Affinity of materials and lubricants.
(3) The friction factor of the auxiliary material in the non-lubricated state.
(4) The microstructure of the material.
(5) Thermal conductivity of the material.
(6) The size of the surface energy of the material and the characteristics of the oxide film.
This part of the process is the main process of the imported bearing repair process, and is the main sign that the repair industry is different from the locomotive manufacturing industry. Whether the stainless steel bearings entering the process can continue to be used, how to meet the requirements of use, will be the central issue to be solved in this part of the process.
Before cleaning, first check the condition of the oil retaining pot to determine and judge the effectiveness of the current fueling and refueling system. Secondly, check the physical and chemical state of the oil and fat, to see if there are thousands, hard, agglomerated, oil, thin, discolored and other deterioration conditions, to determine and judge the rationality of the oil aging replacement cycle, adjust the oil change cycle and oil replenishment system.
Skf bearing cleaning is a necessary part of restoring the cleanliness of stainless steel bearings and measuring the bearing parts. Before cleaning, try to wipe off the old dirty grease. During the operation, be careful not to rotate the bearing at will, so as to avoid the intrusion of impurities in the process of disintegration and the rolling work surface; when handling the bearing, gently handle it to prevent bruises.
The cleaning work is generally carried out in the diesel pool. The diesel oil is heated to 80--90t, pressurized by the oil pump, and the bearings are circulated and circulated. Please have a metal mesh in the lower part of the sink to prevent the skf bearing from falling into the pool. The diesel in the pool should be regularly filtered, replenished with new oil, and cleaned up in the temple to keep the diesel clean.
It is forbidden to use a corrosive medium for the cleaning solution. The traditional washing or high temperature (spraying with a mixture of steam and water, the temperature slightly exceeds the dropping point of the grease) cleaning process, as long as it can meet the cleaning quality requirements, do not have to be renewed.
The cleaning quality of imported bearings is based on the performance of stainless steel bearings. After repeated research, real face and certain process of the railway vehicle department, the skf bearing is cleaned with thousands of net gasoline, filtered, dried and weighed with pool paper. The residual ash is not more than 20mg. In the railway maintenance department, it is easy to grasp.
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