(2) Installation and operation factors
(1) in bad
Shaft bearing requires a minimum of two fulcrum, and two sliding bearings in bad, concentricity error, the load on the bearing width of the distribution will be uneven, the appearance of edges, resulting in the lubricant film rupture, the occurrence of adhesive wear.
(2) the bearing and the bearing hole mismatch
Bearing and the bearing hole with properly, the bearing may be loose and cause fretting wear. With the loose or fretting wear unfavorable for heat transfer may cause the bearing friction surface temperature is too high.
Bearing and bearing with the surface of dirty particles and dirt, but also will enable the conduction bad.
In short, check the damage to the bearing surface, may provide important information of bearing failure, it should be seriously can not forget to check the bearing on the back.
(3) particle intrusion
Particle intrusion is an important reason for the failure of the sliding bearing particles invade the sliding bearing to the external, but also from the bearings within the bearing itself a product of wear and tear. External particles enter through the bearing clearance and by the lubricating oil into the sliding bearing operating environment cleanliness and seal structure is very important.
Lubricants can play a role in cleaning, can the particles into the bearing clearance, the key lies in filter, so the choice of the filter, use and maintenance is extremely important.
Usually bearing materials with the ability of certain particles are embedded, the deposition of particles over the bush material embedded in Tibet, the bearing friction surface grinding, abrasion and wear, the gap increases, the surface becomes rough. According to the environment of the bearing operation, the lubrication method, filter precision, the seal structure and the bearing material to match the sliding bearing designers must pay attention to the problem.
Only to determine the composition of the particles embedded bearing, in order to know their sources and to establish the elimination of the best method and times. Chemical separation techniques can be separated from the bearing surface of the embedded particles. For example: Lead electrodeposition coating of the bearing can be used acetic acid and hydrogen peroxide mixture separation; aluminum tin alloy bearing available sodium hydroxide separation; tin-antimony bearing alloys available acetic acid, peroxide of hydrogen and sodium hydroxide mixture separation.
(4) corrosion
Lubricating oil in the course of continuous oxidation, the oxidation product of the acid corrosion on the bearing material.
In addition, there are some special forms of corrosion attention, such as: oxygen corrosion of the bearing alloy of tin and antimony, sulfur bearing material containing silver and copper corrosion, water corrosion of copper-lead alloy.
(5) insufficient amount of lubricating oil and viscosity changes
Sliding bearing lubricant insufficient catastrophic accident. Dynamic pressure bearing, especially in the dynamic pressure bearing many heavy equipment, lack of lubrication caused by bearing damage due to startup, so when you start the device, in advance so that the circulation of lubricating oil to provide lubrication is very important.
The main advantage of the hydrostatic bearing is to start in the lubricant film, so the design uses the equipment of the hydrostatic bearing, must ensure that the first start of the hydrostatic bearing system boot device.
In the engine, especially when engine light load operation and cold running, fuel is often mixed with the lubricant. So that after the fuel is mixed with the lubricant viscosity decreased, reduced to a critical value, bearing early fatigue damage, drop too low, but also a catastrophic accident.



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